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Engineering Dynamics, Inc. Training 2011
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Section 1 Starting a model In windows file explorer create a
directory called Training Project, and a subdirectory called
Structural Modeling. Launch SACS Executive and go to SACS
Settings\Units Settings and set default units to Metric KN Force.
Then click on the OK button. See picture below.
Set current working directory to Structural Modeling and launch
Precede program by clicking on Modelericon in Interactive window of
Executive (See picture below).
Click here to launch Precede
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Select Create New Model and click ok. Then select Start
Structure Definition Wizard and click ok.(See two pictures
below).
Section 2 Defining the jacket/pile and conductor model Define
the jack/pile based on the drawing 101 Elevations: Water depth 79.5
m Working point elevation: 4.0 m Pile connecting elevation: 3.0 m
Mudline elevation, pile stub elevation, and leg extension
elevation: -79.5m Other intermediate elevations: -50.0, -21.0, 2.0,
15.3 (cellar deck), 23.0m (main deck) (See picture below)
Click here to create the new model
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Keep Generate Seastate hydrodynamic data checked to create
hydrodynamic data, such as pile and w.b overrides. Legs: Click on
the Legs Tab to enter the data for the jacket legs. Number of legs:
4 Leg type: Ungrouted Leg spacing at working point: X1=15 m, Y1=10
m. Row Labeling: Define the Row label to match the drawing Pile/Leg
Batter: Row 1 (leg 1 and leg 3, 1st Y Row) is single batter in Y
Row 2 (leg 2 and leg 4, 2nd Y Row) is double batter (See picture
below for the details of the input)
Conductors: Click on the Conductors Tab and then click on
Add/Edit Conductor Data to enter the data for the conductors. One
conductor well bay that has four conductors The top conductor
elevation: 15.3m First conductor number: 5 Number of conductors in
X direction: 2 Number of conductors in Y direction: 2 The location
of first conductor (LL): X= -4.5m, Y= -1.0m (See drawing 102/104)
The distance between conductors: 2.0m in both X and Y directions.
Disconnected elevations: -79.5m, 3.0m, and 4.0m.
Click here to define leg spacing at the working point.
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(See picture below for the details of the conductor data
input)
Click-on Apply to create the leg/pile and conductor model as
shown below.
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Save model: Go to File/Save As, click O.K from prompted window
and give file name sacinp.dat_01. Define properties of leg members:
We can set up the User Defined Units as English Units for tubular
member diameters and wall thickness. On the Precede toolbar select
Property>Member Group. The Member Group Manage Window will show
up (See picture on the right). The Undefined Group window shows all
group IDs which are assigned to members, but their properties have
not been defined. The IDs will be moved to Defined Groups Window
after properties are defined. Click LG1 from Undefined Groups
window and then click on Add Tab to define the section and material
properties of LG1.This group is segmented and the data can be found
in Drawing 101. Segment 1: D =48.5in, T = 1.75in, Fy = 34.50
kN/cm2, Segment Length = 1.0 m Segment 2: D =47.0in, T = 1.0in , Fy
= 24.80 kN/cm2 Segment 3: D = 48.5in, T = 1.75in, Fy = 34.50
kN/cm2, Segment Length = 1.0 m Member is flooded The unit of each
input filed can be modified to use available data. In the pictures
below the unit of Outside Diameter and Thickness are changed to
English (in). The segment length will be designed later. See the
pictures below for the details of the LG1 group data input.
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Repeat above to define LG2 and LG3 group, the data can be found
in Drawing 101. Define groupLG4,DL6, DL7, CON, PL* and Wishbone
groups, find the section dimensions from Drawing 101. LG4 =
48.5x1.75 DL6 = 42x1.5 DL7 = 42x1.5 CON = 30x1 flooded PL* = 42x1.5
W.B. = 30x1 flooded To define those non-segmented groups click the
group ID from Undefined Group Window and then click on Add Tab;
enter the data and Apply. The picture on the right shows the LG4
data. All above groups have section type of Tubular, and both the
geometry and material data can be defined in Group Manage
window.
Click here to add segment Click here to add thethird
Click here after the last segment is defined to finish group
LG1
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Save model: File/Save As, and name the file to sacinp.dat_02.
Member groups defined at this time shall look like the following:
-------------------------------------------------------------------------------------------------------------
GRUP CON 76.200 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP
DL6 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP DL7
106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP LG1
48.500 1.750 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG1
47.000 1.000 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG1
48.500 1.750 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG2
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG2
119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG2
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG3
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG3
119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG3
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG4
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.8490 GRUP PL1
106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL2
106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL3
106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL4
106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL5
106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP W.B
76.200 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490
-------------------------------------------------------------------------------------------------------------
Section 3 Create the horizontal framings of the jacket Open file
sacinp.dat_02 or continue from last section. Step 1 Select the View
Go to Display> Plan and pick -79.5 to create the framing at the
mudline elevation.TheStructural plan can be found in Drawing
103Plan @ EL (-) 79 500. The model of the plan after built will be
shown in the model plot Plan at EL-79.5 Go to Display>Group
Selection to exclude Pile and Wishbone elements from the current
view. See picture below for details. You should only see the joints
on the jacket legs and conductors in the current view.
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Step 2 Add horizontal members to connect the legs Go to
Member>Add to get dialog box shown below. Click on 101L and 102L
and enter H11as group ID. Then click on Apply or Right-click to add
the member, see picture on the right. Repeat to create member
101L-103L, 102L-04L and 103L-104L.
Step 3 Divide the members by ratio The joint 1100, 1101 and 1102
can be added by divide member by ratio since the joints are at the
mid points of the beams.
Exclude selected groups from the view
Groups selected
Uncheck here to remove unattached joints
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To create joint 1100, go to Member> Divide>Ratio to get
the dialog box shown on the left. Click-on Member 103L-104L Enter
0.5 to Ratio from joint A Enter new joint name 1100 Check on Use
next available Leave others blank Click Apply to create the
joint
You will be getting a new joint and two new elements, the
original member 103L-104L has been replaced by two new created
members. Repeat this step to create joint 1101 and 1102. Step 4
Divide the member by length Joint 1103 and 1104 can be defined by
using Divide by Distance based on the available dimensions on
Drawing 101.
To create joint 1103, go to Member>Divide>Length to get
the dialog box shown on the left. Click to select member 101L-103L
Enter 11.35m to Length from Joint A New Joint name should be 1103
Keep Use next available name checked Leave others blank Joint 1004
can be added same way with distance=4.0m.
Step 5 Connect diagonal brace members Add a member connecting
Joint 1101-1100, and define group label as H12. Add the members
connecting Joint 1101-1102, 1102-1100, 1104-1100 and 1101-1103, and
define group ID as H13.
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Step 6 Create well head frame members Joint 1105 and 1106can be
defined by using Divide by Length based on the available dimensions
on Drawing 101, same as Joint 1103 and 1104.
To create joint 1105, go to Member>Divide>Length to get
the dialog box on the left. Click to select member 1101-1100 Enter
11.35m to Length from Joint A New Joint name should be 1105 Keep
Use next available name checked Leave others blank Joint 1006 can
be added the same way with distance=4.0m.
Add member 1104-1106 and 1103-1105, Group ID should be H13 Use
Member>Divide>Length to create Joint 1107, 1108, 1109 and
1110. The distances can be found in the drawing, see pictures below
for adding Joint 1107 and 1110.
Add Member 1107-1108 and 1109-1110 with Group ID H14. Step 7
Define member group properties Define the group properties to H11,
H12, H13 and H14, the dimensions and material can be found in the
drawing. The pictures below show the sample of H11 and H12
definition.
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Note that the unit of each input can be changed to match
available data. The following pictures show the diameter and
thickness being changed to an English Unit so the data from the
drawing can be input directly. *Make sure units chosen are
correct.
Repeat all the steps in Section 3 to create horizontal plans at
elevation -50.0m, -21.0m and 2.0m.All the data and dimensions
needed to build the model can be found in Drawings 102 and 103.The
joint name and group ID can be found in model plots Plan at EL-50,
Plan at EL-20 and Plan at EL+2 PDF files. Section 4 Create
conductor guide framing Use Plan at EL-50.0 as a sample: Step 1
Create the joints to connect the conductor guide Divide members
2107-2109, 2108-2110 by ratios to create joints 2111 and 2112; Add
members 2107-2108, 2109-2110, and 2111-2112 and then divide them by
ratios to create joint 2113, 2114, and 2115. Connect members
2113-2115 and 2115-2114. Step 2 Define member group for conductor
guide frame Use Property>Member Group to define the group
property for the conductor guide frame. The conductor and frame
connection model is shown in the picture below.
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Repeat the steps above to build the conductor connections at
elevation -21.0 and 2.0. Save the file to SACINP.dat_03. Section 5
Create diagonal members on jacket rows Step 1: Open sacinp.dat_03
with Precede and go to Display>Face and pick Row A. Step 2 Go to
Display>Group Selections to turn off the Pile and Wishbone
elements from the view. Step 3: Turn on the Joint and Group label
by clicking on the J and G icon on the toolbar. Step 4: Define the
X-brace between elevation - 79.5m and -50.0m.
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Go to Member>X-Brace to get the dialog box on the right, and
enter the data: Center joint name 101X Pick four joints 101L, 202L,
201L and 102L (Pick the joints diagonally) Enter BR1 as group ID of
through members (101L-202L) Enter BR2 as the group of other members
Use 0.9 as the K factor Click on Apply
Step 5: Define the X-brace between elevation -50.0m and -21.0m
Go to Member>X-Brace to get the dialog box on the right, and
enter the data: Center joint name 201X Pick four joints 202L, 301L,
302L, and 201L (Pick the joints diagonally) Enter BR3 as group ID
for through members (202L-301L) Enter BR4 as the group for the
other members Use 0.9 as the K factor Click on Apply Step 6 Repeat
Step 5 to build the X-brace between Elevation -21.0m and 2.0m.The
new center joint name should be 301X; group IDs should be BR5 for
through members and BR6 for others. The locations of center joints
101X, 201X and 301X are automatically calculated by the
program.
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Step 7 Repeat Step 1 to Step 6 to build X-braces on Row B, Row 1
and Row 2; use same Group IDs and the center joint ID starts from
102X on Row B, 103X on Row 1 and 104X on Row 2. Step 8 Define the
group properties for the X-brace members. BR1, BR3, and BR5 are
through members which are segmented. BR2, BR4, and BR6 are
non-segmented members. The dimensions of all members can be found
in Drawing 101. Save model and give a new name sacinp.dat_04.
Section 6 Creating deck frame Step 1 Cellar Deck (El +15.30m): Go
to File>Structure Definition and click on the Deck Girders Tab.
Then click on Add/Edit Deck Girder Data. You should see the
following window below. Deck elevation: select 15.30 Deck
extension: input 4.0m at structure North and South Click Apply to
apply the input information to the model.
Check-on here to add the deck extension beams
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Step 2 Main deck (El +23.0m) Click on Add/Edit Deck Girder Data
Deck elevation: select 23.00 Deck extension: input 4.0m at
structure North and South, 5.0m at structure East Click Apply or OK
to apply to model. By clicking ok it will apply to the model and
also
close out the structure definition box.
Step 3 Go to Display>Plan and select Plan at 15.3. Then go to
Display>Labeling>Special and turn off Show jacket rows to get
a larger view. Turn on the Joint and Group Label from Toolbar icon.
Step 4 Change the member group ID to W01 and W02 as shown in model
plot Plan at 15.3, go to Member > Details/Modify and select the
elements to change. Step 5
Check-on here to add the deck extension beams
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The Member divide feature can be used to simplify modeling.
Joint and group names should be defined as shown in the model plot
Plan at 15.3. The dimensions needed to build the model can be found
in Drawing 202. The functions recommended to build the frame model
are: Member>Divide>Distance Member>Divide>Ratio Member
>Divide>Perpendicular The new created joints naming should
start from 7100.All the distances and ratios can be found in the
drawing. The conductor guide should be connected to the deck using
dummy members. This is the same as the ones in the jacket. Step 6
Repeat Step 3 to Step 5 to build the frame in EL 23.00 plan, and
the modeling results are shownin the model plotPlan at 23.0. Step 7
Define the properties for group W01 and W02; the sections should be
selected from the AISC 9th edition Library.
The above three pictures is a sample of how to define W01 (From
Left to Right).Repeat it to define the properties for W02. Deck
member groups defined at this time shall look like thefollowing:
-------------------------------------------------------------------------------------------------------------
GRUP W01 W24X162 20.007.72224.80 1 1.001.00 7.8490 GRUP W02 W24X131
20.007.72224.80 1 1.001.00 7.8490
-------------------------------------------------------------------------------------------------------------
Click to select Section from the Library
Select wide flange only
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Save the model as sacinp.dat_05 Section 7 Joint connection
design Step 1 Include only the jacket in the current active window.
Exclude the deck, piles, conductors, and wishbone element from the
current view. Go to Display>Group Selections and exclude group
PL1-PL5, W01, W02, CON, DL6-DL7, and W.B. Check off show unattached
joints and then click on Apply. Refer to the picture below.
Step 2 Go to Joint> Connection > Automatic Design. Check
the box Offset braces to outside of chord. For Gapping option use
Move Brace, and for Brace Move use Along Chord. Set Gap = 5 cm and
Gap size option to Minimum only. Select Use existing offsets if gap
criteria is met.
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Under joint Can/Chord options select Update segmented groups can
lengths and set Can length option to API minimum requirements.
Select Increase joint can lengths only, seee above two pictures for
the detail options to be selected and click on Apply to create the
joint can model. The leg members segment lengths are automatically
updated and the member end offsets of each brace member are created
automatically. Step 3 Create dummy members to connect the guide
joint to the framing joint created in last step. The conductor and
frame connection model is shown in the picture below. DUM = 12.75 x
.375
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Repeat the steps above to build the conductor connection
elevation -21.0, 2.0 and 15.3. Save the model to sacinp.dat_06. The
final updated Can length for legs shall look like the following:
-------------------------------------------------------------------------------------------------------------
GRUP LG1 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84902.10
GRUP LG1 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP
LG1 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.76 GRUP
LG2 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84902.16 GRUP
LG2 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG2
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.63 GRUP LG3
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84902.33 GRUP LG3
119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG3
123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.60 GRUP LG4
123.19 4.445 20.007.72234.50 1 1.001.00 0.500 7.8490
-------------------------------------------------------------------------------------------------------------
Section 8 Define deck beam offsets Step 1 Go to Display>Plan and
select plan at 15.3m. Exclude group DUM, W.B and CON from current
view. Step 2
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Go to Member > Offsets and drag a window to pick all members
in current view (Selected members will be highlighted in red).
Change Offset Type to Top of Steel. Click on Apply to create the
offsets. Refer to picture on the right. Note: The deck beam
properties must be defined before you can define the offset type to
Top of Steel.
Step 3 Repeat above two steps to define the offset for the beams
at Plan EL 23.00m. Save the model to sacinp.dat_06. Section 9
Define member code check properties Define Ky/Ly for horizontal
framings: Use Property > K Factor > Ky to modify Ky factor
for H11 members in XY plane Z=-79.50 m and H21 members in XY plane
Z=-50.0 m Use Property > Effective Length > Ly to modify Ly
factor for H31 members in XY plane Z=-21.0 m and H41 members in XY
plane Z=2.0 m Section 10 Define deck weight (Area weight) Step 1
Add cellar deck surface weight ID (CELLWT1) Using Weight >
Surface Definition input CELLWT1 for Surface ID, pick up joint
71BD, 71ED, and 74BD for local coordinate joints. Input 0.5 for
Tolerance, and pick up71BD, 71ED, 74ED and 74BD by holding CTRL key
for Boundary joints. Select load direction to Members in local Y
and then click Apply to add this surface ID definition.
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Step 2 Add main deck surface weight ID (MAINWT1) Using Weight
> Surface Definition input MAINWT1 for Surface ID. Pick up joint
81BD, 81FD and 84BD for local coordinate joints, input 0.5 for
Tolerance, and pick 81BD, 81FD, 84FD and 84BD by holding CTRL key
for Boundary joints. Select load direction to Local Y and then
click Apply to add this surface ID definition.
Step 3 Add weight group AREA by adding surface weight for
deck
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Using Weight > Surface Weight input AREA as Weight Group and
AREAWT as Weight ID, input weight pressure of 0.5 kN/m2 for the
cellar deck and move CELLWT1 to Included Surface IDs and click
Apply. Then input a weight pressure of 0.75 kN/m2 for the main deck
and move MAINWT1 to Included Surface IDs and click Apply.
Step 4 Add weight group LIVE by adding surface weight Add weight
group LIVE by using surface weight feature as in step 3. Weight ID
MAINLIVE includes the main deck weight pressure of 5.0 kN/m2and ID
CELLLIVE includes the cellar deck weight pressure = 2.5kN/m2.
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The added surface IDs and surface weights shall look like
following:
-------------------------------------------------------------------------------------------------------------
SURFID CELLWT1 LY 71BD 71ED 74BD 0.500 SURFDR 71BD 71ED 74ED 74BD
SURFID MAINWT1 LY 81BD 81FD 84BD 0.152 SURFDR 81BD 81FD 84FD 84BD
SURFWTAREA 0.500AREAWT 1.001.001.00CELLWT1 SURFWTAREA 0.750AREAWT
1.001.001.00MAINWT1 SURFWTLIVE 2.500CELLLIVE 1.001.001.00CELLWT1
SURFWTLIVE 5.000MAINLIVE 1.001.001.00MAINWT1
-------------------------------------------------------------------------------------------------
Section 11 Define deck weight (Equipment weight) Step 1 Define
Skid1 Use Weight > Footprint Weight Weight group is EQPT and
Footprint ID is SKID1; Weight = 1112.05 kN; Footprint center (5.0,
2.0, 23.0); Relative weight center (0, 0, 3.0) Skid Length = 6 m;
Skid Width = 3 m; 2 skid beams in X direction (longitudinal)
Click Apply and the summation of forces will be shown on a
pop-up window. To save the input footprint weight select Keep. Step
2 Define Skid2 Weight group is EQPT and Footprint ID isSKID2 Weight
= 667.23 kN; Footprint center (-5.0, -7.0, 23.0); Relative weight
center (0, 0, 2.5)
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Skid Length = 6 m; Skid Width = 2.5 m; 2 skid beams in X
direction (longitudinal)
Step 3 Define Skid4 Weight group ID is EQPT and Footprint ID is
SKID4 Weight = 155.587 kN; Footprint center (10.0, 6.0, 23.0);
Relative weight center (0, 0, 4.0) Skid Length = 6 m; Skid Width =
3 m; 3 skid beams in X direction (longitudinal)
Step 4 Define Skid3
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Weight group is EQPT and Footprint weight ID is SKID3 Weight =
444.82 kN; Footprint center (5.0, 0.0, 15.3); Relative weight
center (0, 0, 2.0) Skid Length = 6 m; Skid Width = 2.5 m; 2 skid
beams in X direction
The added EQPT footprint weights shall looks like following:
-------------------------------------------------------------------------------------------------------------
WGTFP EQPT1112.05SKID1 5.000 2.00023.000R 3.0006.0003.000 2 WGTFP2
1.001.001.00.152L WGTFP EQPT667.230SKID2 -5.000-7.00023.000R
2.5006.0002.500 2 WGTFP2 1.001.001.00.152L WGTFP EQPT155.587SKID4
10.000 6.00023.000R 4.0006.0003.000 3 WGTFP2 1.001.001.00.152L
WGTFP EQPT444.820SKID3 5.000 15.300R 2.0006.0002.500 2 WGTFP2
1.001.001.00.152L
-------------------------------------------------------------------------------------------------------------
Section 12 Define misc weight on the deck and the jacket Step 1
Walkway on the main and cellar decks Go to Weight > Member
Weight and hold control key to select all members on the east side
of the decks, and enter the following data:
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Weight group: MISC Weight ID: Walkway Weight Category:
Distribute Coordinate system: Global Initial weight value: 2.773
kN/m Final weight value: 2.773 kN/m Load dir. factors: Defaults
Click on Apply and keep the weight.
Step 2 Enter crane weight Go to Weight > Joint Weight and
pick up joint 804L and enter the data: Weight Group: MISC Weight
ID: CRANEWT Weight: 88.964kN Load dir. Factors: Defaults Click on
Apply then select Keep, see pictures on the right.
Step 3 Enter the Firewall weight Go to Weight > Member weight
and select the following members: 703L-74BD, 7102-7103, 7106-7107,
and then enter the following data:
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Weight Group: MISC Weight ID: FIREWALL Weight Cate.:
concentrated Coord system: Global Concen. Weight: 15.0kN Distance:
1.5m Load factors: Defaults Click on Apply and select to Keep the
weight, see pictures on the right for details.
Step 4 Enter Padeye weight on the jacket Go to Weight > Joint
Weight and pick up joint 501L, 502L, 503L and 504L, and enter the
following data: Weight group: LPAD Weight ID: PADEYE Weight: 2.0kN
Check on Include buoyancy Density: 7.849 ton/m^3 Click on Apply and
Keep, see pictures on right for details.
Step 5 Enter the walkway weight at boat landing elevation (EL
2.0m) Go to Weight > Member Weight and pick all the members at
EL 2.0 plan except the wellbay members and then enter the data as
following: Group ID: WKWY Weight ID: WLKWAY Weight Category:
Distributed Coord. System: Global Initial weight: 1.5kN/m
Final weight: 1.5kN/m Load dir. Factors: Defaults Include
buoyancy: Yes & wave load: Checked Density: 1.5ton/m^3
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Click on Apply and Keep the data. See picture on the right for
details.
Step 6 Define Anode weight Go to Display > Volumes and select
Type of volume to Volumes to include. Select joint 101L to get the
min. Z-coordinate and select joint 301X to get the max.
Z-coordinate, and then click Apply. This will display only the part
of jacket with anode protection. Go to Display > Group selection
to exclude group DUM, PL1-PL5, W.B, CON, H13-H14, H23-H24 and
H32-H33.This will exclude the wishbone, conductor, pile, and
horizontal elements from the current view. Go to Weight > Anode
Weight and drag a window to select all the members in the current
view and enter the data as following: Weight group ID: ANOD Weight
ID: Anode Anode weight: 2.5kN # Anodes: 2/Member Anode space: Equal
Include Buoyancy: On Density: 2.70tonne/m^3
Click on Apply and Keep the weight, see picture on right for
details.
Save the mode to Sacinp.dat_07. Part of jacket weights shall
look like following:
-------------------------------------------------------------------------------------------------------------
WGTMEMANOD101L101X 6.040 2.500 1.001.001.00GLOBCONC 2.700ANODE
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WGTMEMANOD101L101X 12.080 2.500 1.001.001.00GLOBCONC 2.700ANODE
WGTMEMANOD103L102X 6.040 2.500 1.001.001.00GLOBCONC 2.700ANODE
WGTMEMANOD103L102X 12.080 2.500 1.001.001.00GLOBCONC 2.700ANODE
WGTJT LPAD 2.000PADEYE 501L 7.849 1.0001.0001.000 WGTJT LPAD
2.000PADEYE 502L 7.849 1.0001.0001.000 WGTJT LPAD 2.000PADEYE 503L
7.849 1.0001.0001.000 WGTJT LPAD 2.000PADEYE 504L 7.849
1.0001.0001.000 WGTMEMWKWY401L4101 1.500 1.5001.001.001.00GLOBUNIF
1.500WLKWAY WGTMEMWKWY4101402L 1.500 1.5001.001.001.00GLOBUNIF
1.500WLKWAY WGTMEMWKWY401L4103 1.500 1.5001.001.001.00GLOBUNIF
1.500WLKWAY
-------------------------------------------------------------------------------------------------------------
Section 13 Deck Loads To create inertia loads from various weights
defined on deck structure three steps need to be performed: Step 1
Define the center of the acceleration: Go to Weight> Center of
Roll, and define center ID CEN1 at (0.0, 0.0, 0.0) location. Then
select Apply
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 30
Step 2 Define the accelerations: Use Environmental>
Loading> Weight: Check off Acceleration and define 1.0g in Z
direction for load condition AREA, EQPT, LIVE and MISC. Picture on
the right shows the sample of load case AREA.
Step 3 Use the weight groups to create the loads:
Environmental> Loading> Weight: Check off Include weight
group. select weight group AREA, EQPT, LIVE and MISC to be included
in load case. Use Load condition AREA, EQPT, LIVE and MISC
respectively. Note: EQPT, LIVE, and MISC will already have
acceleration defined from above, but included weight group needs to
be added also. The picture shows the load case AREA definition.
Save the model to Sacinp.dat_08 Weights defined on the jacket
will be added to the environmental load conditions to account
forthe possible buoyancy and possible wave loads. The added inertia
load cases shall look like following:
-------------------------------------------------------------------------------------------------------------
LOAD LOADCNAREA INCWGT AREA ACCEL 1.00000 N CEN1
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 31
LOADCNEQPT INCWGT EQPT ACCEL 1.00000 N CEN1 LOADCNLIVE INCWGT
LIVE ACCEL 1.00000 N CEN1 LOADCNMISC INCWGT MISC ACCEL 1.00000 N
CEN1
-------------------------------------------------------------------------------------------------------------
Section 14 Environmental Loading Step 1 Define drag and mass
coefficients Use Environmental> Global Parameters> Drag/Mass
Coefficient to define the data (Shown in the picture). Cd=0.6 and
Cm=1.2 for both clean and fouled members. All the members have same
Cd and Cm.
Step 2 Define marine growths Go to Environment>Global
Parameters>Marine growth to enter the data shown in the picture
on the right.
The added marine growth override lines shall look like
following:
-------------------------------------------------------------------------------------------------------------
MGROV MGROV 0.000 60.000 2.500 1.400 MGROV 60.000 79.500 5.000
1.400
------------------------------------------------------------------------------------------------------------
Step 3 Hydrodynamic modeling
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 32
Go to Environment>Global Parameters>Member Group Overrides
Override the jacket leg members with group ID LG1-LG3 That need to
take into account the load increase due to the appurtenant
structures like J-tubes and Risers. Highlight groups LG1-Lg3 that
the overrides need to be added to. The picture on the right
indicates that the drag and mass coefficients have been factored by
1.5 to account for the load increases.
The hydrodynamic model data should look like following:
-------------------------------------------------------------------------------------------------------------
GRPOV GRPOV LG1 F 1.501.501.501.50 GRPOV LG1 F 1.501.501.501.50
GRPOV LG1 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG2
F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG3 F
1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOV LG3 F
1.501.501.501.50 GRPOVAL PL1NN 0.001 0.001 0.001 GRPOVAL PL2NN
0.001 0.001 0.001 GRPOVAL PL3NN 0.001 0.001 0.001 GRPOVAL PL4NN
0.001 0.001 0.001 GRPOV W.BNF 0.001 0.001 0.001 0.001 0.001
-------------------------------------------------------------------------------------------------------------
Step 4 Environmental loading Operating Storm (three directions
considered: 0.00, 45.00, 90.00): load case P000, P045, P090 Jacket
weight groups ANOD and WKWY should be included in all three load
cases by using Environment > Loading > Weight > Include
Weight Group to account for weight, buoyancy and wave/current
loads. Go to Environment> Loading> Seastate to define the
wave, current, wind and dead/buoyancy load parameters. The data can
be found in the design specification, and the pictures below show
the details of load case P000.
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 33
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 34
The 3 operating storm load case lines shall look like following:
-------------------------------------------------------------------------------------------------------------
LOADCNP000 INCWGT ANODWKWY WAVE WAVE1.00STRE 6.10 12.00 0.00 D
20.00 18MS10 1 WIND WIND D 25.720 0.00 AP08 CURR CURR 0.000 0.514
0.000 -5.000BC LN CURR 79.500 1.029 DEAD DEAD -Z M BML LOADCNP045
INCWGT ANODWKWY WAVE WAVE1.00STRE 6.10 12.00 45.00 D 20.00 18MS10 1
WIND WIND D 25.720 45.00 AP08 CURR CURR 0.000 0.514 45.000 -5.000BC
LN CURR 79.500 1.029 DEAD DEAD -Z M BML LOADCNP090 INCWGT ANODWKWY
WAVE WAVE1.00STRE 6.10 12.00 90.00 D 20.00 18MS10 1 WIND WIND D
25.720 90.00 AP08 CURR CURR 0.000 0.514 90.000 -5.000BC LN CURR
79.500 1.029 DEAD DEAD -Z M BML
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 35
-------------------------------------------------------------------------------------------------------------
Extreme Storm (three directions considered: 0.00, 45.00, 90.00):
load case S000, S045 andS090 Extreme storm load cases can be
defined similar as the operating storm load cases, except 100-year
storm criteria are used to generate the environmental forces.
Jacket weight groups ANOD and WKWY should be included in all three
load cases. The water depth should be overridden to consider the
high tide. The following pictures show the detailed input data from
the Specification.
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 36
The 3 extreme storm load case lines shall look like following:
-------------------------------------------------------------------------------------------------------------
LOADCNS000 INCWGT ANODWKWY WAVE WAVE1.00STRE 12.19 81.00 15.00 0.00
D 20.00 18MS10 1 WIND WIND D 45.170 0.00 AP08
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 37
CURR CURR 0.000 0.514 0.000 -5.000BC LN CURR 81.000 1.801 DEAD
DEAD -Z 81.000 M BML LOADCNS045 INCWGT ANODWKWY WAVE WAVE1.00STRE
12.19 81.00 15.00 45.00 D 20.00 18MS10 1 WIND WIND D 45.170 45.00
AP08 DEAD DEAD -Z 81.000 M BML CURR CURR 0.000 0.514 45.000
-5.000BC LN CURR 81.000 1.801 45.000 LOADCNS090 INCWGT ANODWKWY
WAVE WAVE1.00STRE 12.19 81.00 15.00 90.00 D 20.00 18MS10 1 WIND
WIND D 45.170 90.00 AP08 CURR CURR 0.000 0.514 90.000 -5.000BC LN
CURR 81.000 1.801 90.000 DEAD DEAD -Z 81.000 M BML
-------------------------------------------------------------------------------------------------------------
Section 15 Load combination and code check options Step 1 Load
combination Six load combinations OPR1, OPR2, OPR3, STM1, STM2 and
STM3 will be added into the model. Three of them are corresponding
to operating storms and the other three are corresponding to
extreme storms. Load factor of 1.1 will be used for environmental
loads. The live load will be included with a factor of 0.75 in
extreme storm load combinations. Go to Load>Combine load
conditions to define the load combinations. The following two
pictures show the combinations of operating and extreme storm
conditions.
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 38
The load combination lines shall look like following:
-------------------------------------------------------------------------------------------------------------
LCOMB LCOMB OPR1 AREA1.0000EQPT1.0000LIVE1.0000MISC1.0000P0001.1000
LCOMB ORP2 AREA1.0000EQPT1.0000LIVE1.0000MISC1.0000P0451.1000 LCOMB
ORP3 AREA1.0000EQPT1.0000LIVE1.0000MISC1.0000P0901.1000 LCOMB STM1
AREA1.0000EQPT1.0000LIVE0.7500MISC1.0000S0001.1000 LCOMB STM2
AREA1.0000EQPT1.0000LIVE0.7500MISC1.0000S0451.1000 LCOMB STM3
AREA1.0000EQPT1.0000LIVE0.7500MISC1.0000S0901.1000
-------------------------------------------------------------------------------------------------------------
Step 2 Analysis load case selection Go to Options> Load
condition selection to select all the load combinations to analyze
and report. The picture on the right shows the input.
Step 3 Allowable stress modification factor (AMOD) Allowables
can be increased by 1/3 based on API code, and this should be
entered using the AMOD line. Go to Options > Allowable
stress/Mat Factor and enter the data as shown in the picture
below.
Add unity check partition line (UCPART). Go to Options>Unity
Check Ranges and enter the data as shown in the picture below.
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Engineering Dynamics, Inc. Training 2011
Structural Modeling Page - 39
The LCSEL, UCPART and AMOD lines shall look like following:
-------------------------------------------------------------------------------------------------------------
LCSEL ST OPR1 ORP2 ORP3 STM1 STM2 STM3 UCPART
0.5000.5001.0001.000300.0 AMOD AMOD STM1 1.330STM2 1.330STM3 1.330
-------------------------------------------------------------------------------------------------------------
Save the model to Sacinp.dat_09
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Engineering Dynamics, Inc. Training 2011
Linear Static Analysis - 1
Linear Static Analysis
Section 1 Create the static analysis directory and separate the
model file. Step 1 Create the directory for static analysis Under
Training Project, create Static subdirectory; copy sacinp.dat_09 to
the directory, and make this directory current. Step 2 Separate the
model Open sacinp.dat_09 with Precede and then go to File/Save As
and select Model data only, and click-on OK to save the model file
to sacinp.dat. See picture below.
Step 3 Separate the Environmental load Go to File/Save As and
select Seastate data only, click on OK to save the separated
seastate input file to seainp.dat. See picture below.
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Engineering Dynamics, Inc. Training 2011
Linear Static Analysis - 2
Section 2 Create a Joint Can input file Step 1 Using Datagen to
create file Click on datagen and select to create a new file. Then
click on Joint Can and click select. See picture to right. Under
Joint Can Options select API. Select R for Allowable Limit. Minimum
gap allowed should be 5 cm. Leave the rest as default. Under
Reports tab select max as UC Order and Joint Can Output Report
Options. See pictures below.
Save as jcninp.inp Joint Can File will appear as the following:
-------------------------------------------------------------------------------------------------------------------
JCNOPT API MN 5. C NID MAMX END
-------------------------------------------------------------------------------------------------------------------
Section 3 Create the static analysis run file Step 1 Select the
analysis type and sub-type Click on Analysis Generator from the
Executive window and select Static for Type and Basic Static
Analysis for Subtype. See below picture for details.
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Engineering Dynamics, Inc. Training 2011
Linear Static Analysis - 3
Step 2 Select the Seastate analysis option Check and click on
Edit Environmental Loading Options to active the Seastate program
and get the Seastate Analysis Options shown on right. Select the
option to match the definition in the picture below. Click on O.K
to save the option.
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Engineering Dynamics, Inc. Training 2011
Linear Static Analysis - 4
Step 3 Select member code check option Click on Edit Element
Check Options to get the code check option window and set the
options Detailed as following: Use Post input file: No Code
criteria: API 21st edition Stress/code check location: 2/2 Report
option: Override the model Following report should be turned on:
Joint deflection Joint reaction Member end forces UC range Click on
OK to save the options.
Step 4 Select Tubular Joint Check Options Check and click on
Edit Tubular Joint Check Options to get the tubular joint check
window shown below. For joint can input file select jcninp.inp
file. See Picture.
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Engineering Dynamics, Inc. Training 2011
Linear Static Analysis - 5
Section 4 Run the analysis and review the results Step 1
Define/change the result file extension name Change the file ID to
DAT and click on ID icon to apply. Step 2 Select model input file,
the model file is saved in step 2 of Section 1. Step 3 Select or
check the Seastate input file. Step 4 Select or check the Joint Can
input file Step 5 Run the analysis. See below picture for the
location of above options.
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Engineering Dynamics, Inc. Training 2011
Linear Static Analysis - 6
Step 6 Check results.
Type in or select the file ID here
Click here to apply
Click here to run the analysis
Check here for the file extension change Click here to
select
model input file
-
Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 1
Static Analysis with Non-Linear Foundation
Section 1 Create a PSI input data file
Step 1 Create a new folder and name it Static PSI, and then make
it the current folder.
Copy SACINP.DAT and SEAINP.DAT files from Static directory to
current folder.
Step 2 Create PSI input data file
Click-on Data file icon to launch Datagen program, and select
Create new data file and click-on OK to get the second window
pop-up, as shown below; select Pile Soil Interaction as the
analysis type and make sure the unit is Metric KN. Click-on Select
and skip the Title and get next step to define the analysis
options..
Step 3 Define analysis options
Leave default options for both General and Output Options, and
click Next.
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 2
Step 4 Select the results to plot
Click-on No to LCSEL and PILSUP cards. Click on Yes to PLTRQ
card to get Plot Option window and select the options shown
below.
Click-on Next and select Include all piles in plot, select all
load cases to be plotted. Do not define plot size and specify pile
section data until get Pile Group definition.
Step 5 Define pile group
Define two pile groups and one conductor group, the pile group
ID =PL1 and PL2; conductor group ID =CND. The first pile group
segment length is 10m and second segment has length of 30m with
available end bearing area of 0.656m^2.
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 3
Click-on More to add the segments or groups, and click-on Next
to finish the pile group definition.
Step 6 Define the piles
Define the pile head joint, batter joint, pile group ID and soil
ID as shown in following picture for the four piles, and repeat to
define conductors.
Click-on More to add a pile and click-on Next to finish the pile
definition and get to next step.
Clickheretoaddmoregroups Clickheretogettonext
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 4
Step 7 Define T-Z data type
The picture on right shows the type of axial data can be defined
in SACS system. The data for the training is T-Z data. Select User
Defined T-Z Curves and click-on Next to get next step.
Step 8 Define T-Z axial header data
The header data defines the total number of soil strata,
Z-factor, Soil ID and the maximum data point of any T-Z curves. The
data should be got from the Design Specification for this training,
and is shown in following picture.
Click-on next to get to next step.
Step 9 Define T-Z soil stratum data
-
Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 5
This step defines the soil stratum information followed by soil
data of each stratum (Step 10), the data needs to be defined is
number of point of the curve, stratum location and T factors;
following picture shows the stratum definition of the top soil.
Step 10 Define the soil data of the stratum
The data is from the spec document, the picture on right shows
the soil at 0.0m location.
Repeat Step 9 and 10 to enter all 8 soil T-Z curves.
Step 11 Define end bearing data
The picture below will show up when finish the step 10. Click-on
Yes to enter the Q-Z axial header data.
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 6
Define the Q-T axial header data shown in below picture,
click-on Next to accept the data and get to soil stratum data.
Define the soil stratum data as shown in following two pictures
and repeat it for all the stratums.
Step 12 Torsional data
The torsional stiffness of the soil can be defined as linear
spring, following two pictures gives the detail of the input.
Step 13 P-Y data input
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 7
The P-Y data input is similar to Axial T-Z data, follow the
direction of Step 7 to 10 and get the data from the soil report to
finish the input.
Following two pictures show the soil type selection and P-Y
header definition.
Following two pictures show the stratum and soil data definition
at 0.0m location, repeat the input to define all the P-Y soils at
rest locations.
Save the file and name it PSIINP.DAT.
Section 2 Static analysis with PSI
Your current directory should have three input files: SEAINP.DAT
containing the loading condition, SACINP.DAT containing the model
information includes the weight definition and PSIINP.DAT
containing the pile model information.
Step 1 Select analysis type and options
File ID: dat
Analysis type: Static
-
Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 8
Analysis subtype: Static analysis with Pile/Soil Interaction
Analysis options: selections are shown in the picture below
Step 2 Edit analysis options
Click-on to get the window shown below and make selections as
shown in the window, click-on OK when finish; Click-on to define
the code option shown in below window on right: Code option: API RP
2A 21th edition/AISC 9th edition
Segment to be checked: 2 for both segmented and non-segmented
member
Override the report to include Joint deflection, Joint reaction,
Member end forces and the UC range report.
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 9
Step 3 Define input files and run the analysis
Select the input files as shown in below window and check the
output file names, click-on Run Analysis Tab to run the
analysis.
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 10
Section 3 Check the analysis results
Member code check results can be checked from post listing file
or Postvue database, see below.
---------------------------------------------------------------------------------------------------------------
PSI SAMPLE ANALYSIS DATE 12-FEB-2011 TIME 16:10:54 PST PAGE
158
SACS-IV MEMBER UNITY CHECK RANGE SUMMARY
GROUP III - UNITY CHECKS GREATER THAN 1.00 AND LESS
THAN*****
MAXIMUM LOAD DIST AXIAL BENDING STRESS SHEAR FORCE
SECOND-HIGHEST THIRD-HIGHEST
MEMBER GROUP COMBINED COND FROM STRESS Y Z FY FZ KLY/RY KLZ/RZ
UNITY LOAD UNITY LOAD
ID UNITY CK NO. END N/MM2 N/MM2 N/MM2 KN KN CHECK COND CHECK
COND
102P-202P PL1 1.438 STM1 0.0 -77.40 -114.13 111.13 -144.24
165.19 81.9 81.9 0.694 STM2 0.632 STM3
103P-203P PL1 1.396 STM3 0.0 -84.84 -134.10 13.98 -18.21 187.41
81.5 81.5 0.751 STM2 0.733 STM1
104P-204P PL1 1.636 STM2 0.0 -97.92 -140.61 -12.02 15.35 199.60
81.9 81.9 1.454 STM1 1.179 STM3
803L-8104 W01 1.065 OPR3 0.0 -5.42 -137.51 15.34 -5.14 230.24
18.9 64.6 1.002 OPR2 0.948 OPR1
804L-83FD W01 1.215 OPR3 0.0 0.01 -173.57 8.95 -3.79 241.85 18.9
64.6 1.189 OPR2 1.150 OPR1
8102-8103 W01 1.083 OPR3 5.0 -4.86 146.66 -7.75 -0.03 160.83
18.9 64.6 1.078 OPR2 1.077 OPR1
8103-802L W01 1.633 OPR1 5.0 -5.18 -221.15 -14.97 -5.99 -503.52
18.9 64.6 1.557 OPR2 1.489 OPR3
8104-8105 W01 1.327 OPR3 5.0 -5.42 182.97 -7.23 0.08 204.19 18.9
64.6 1.302 OPR2 1.280 OPR1
8105-804L W01 1.902 OPR1 5.0 -5.29 -265.76 -8.28 -3.11 -609.48
18.9 64.6 1.863 OPR2 1.821 OPR3
802L-804L W02 1.758 OPR3 10.0 -2.24 -178.44 -6.55 -1.14 -606.56
38.5 132.5 1.724 OPR2 1.613 OPR1
---------------------------------------------------------------------------------------------------------------
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 11
Pile check results are listed in psi listing file.
---------------------------------------------------------------------------------------------------------------
PSI SAMPLE ANALYSIS DATE 12-FEB-2011 TIME 16:10:51 PSI PAGE
465
PSI SAMPLE ANALYSIS
* * * P I L E M A X I M U M U N I T Y C H E C K S U M M A R Y *
* *
PILE GRUP LOAD ******* PILEHEAD FORCES ******* * PILEHEAD
DISPLACEMENTS * *********** STRESSES AT MAX. UNITY CHECK
************
JT. CASE AXIAL LATERAL MOMENT AXIAL LATERAL ROTATION DEPTH AXIAL
FBY FBZ SHEAR COMB. UNITY
KN KN KN-M CM CM RAD M ---------------- N/MM2 -------------
CHECK
101P PL1 OPR1 -2045.22 173.63 386.2 0.16 1.90 0.001688 0.0
-25.00 18.47 -1.67 4.22 -43.54 0.268 OPR2 -1233.30 196.10 430.6
0.10 2.18 0.001947 10.4 -9.24 -26.42 -0.09 1.11 -35.66 0.219 OPR3
-2139.58 289.73 730.6 0.16 3.44 0.002927 0.0 -26.15 35.07 1.07 7.13
-61.23 0.365 STM1 3125.92 886.34 4514.2 -0.23 30.98 0.014261 0.0
38.20 216.77 2.46 20.44 254.99 1.071 STM2 5852.36 841.32 3848.9
-0.43 24.92 0.012223 0.0 71.52 184.68 7.58 18.66 256.36 1.110 STM3
2729.80 811.41 3849.2 -0.20 23.74 0.011847 0.0 33.36 184.85 0.85
18.91 218.21 0.917 102P PL2 OPR1 -4660.75 156.22 375.3 0.35 1.70
0.001471 0.0 -56.96 17.99 -1.04 3.89 -74.98 0.480 OPR2 -2774.74
183.64 411.1 0.21 2.04 0.001816 0.0 -33.91 19.71 -1.03 4.51 -53.65
0.334 OPR3 -703.99 263.77 615.9 0.06 3.11 0.002723 10.4 -5.38
-37.39 -0.04 1.52 -42.77 0.257 STM1 -9529.89 792.77 4871.0 0.71
30.61 0.015049 0.0 -116.47 233.62 -11.84 22.86 -350.39 1.536 STM2
-3152.27 775.31 3967.1 0.24 24.19 0.012492 0.0 -38.53 190.50 -2.44
19.83 -229.04 0.966 STM3 3864.15 793.62 3584.8 -0.28 21.89 0.011275
0.0 47.23 172.13 2.72 18.20 219.38 0.936
103P PL1 OPR1 -1876.81 176.84 395.9 0.14 1.93 0.001709 0.0
-22.94 -18.91 -1.95 4.30 -41.95 0.256 OPR2 -3830.00 198.40 499.9
0.29 2.14 0.001790 0.0 -46.81 -23.97 -1.22 4.91 -70.81 0.444 OPR3
-5919.23 255.29 688.1 0.44 2.95 0.002458 0.0 -72.34 -33.01 1.48
6.50 -105.39 0.664 STM1 3287.87 888.94 4526.0 -0.24 31.12 0.014285
0.0 40.18 -217.34 2.02 20.44 257.54 1.083 STM2 -3354.38 801.30
4291.3 0.25 26.45 0.013078 0.0 -41.00 -206.01 -5.25 20.58 -247.07
1.042 STM3 -10445.87 724.51 4122.7 0.78 23.08 0.012172 0.0 -127.66
-197.98 0.60 20.79 -325.65 1.446 104P PL2 OPR1 -4773.04 159.44
384.3 0.36 1.74 0.001498 0.0 -58.33 -18.43 -0.99 3.97 -76.79 0.491
OPR2 -5510.91 164.94 420.3 0.41 1.76 0.001470 0.0 -67.35 -20.18
0.18 4.13 -87.54 0.561 OPR3 -4560.62 249.15 641.6 0.34 2.89
0.002458 0.0 -55.74 30.72 -2.29 6.26 -86.55 0.540 STM1 -9635.55
793.07 4892.1 0.72 30.75 0.015100 0.0 -117.76 -234.65 -11.59 22.92
-352.69 1.546
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Engineering Dynamics, Inc. Training 2011
Static analysis with PSI- 12
STM2 -12057.11 724.89 4315.2 0.90 24.80 0.013054 0.0 -147.36
-207.23 -1.10 21.56 -354.59 1.583 STM3 -8787.05 717.25 3853.9 0.66
21.46 0.011596 0.0 -107.39 184.87 -8.78 19.98 -292.47 1.292 PSI
SAMPLE ANALYSIS DATE 12-FEB-2011 TIME 16:10:51 PSI PAGE 480 * * * P
I L E M A X I M U M A X I A L C A P A C I T Y S U M M A R Y * * *
PILE GRP ********* PILE ********* ************** COMPRESSION
************* **************** TENSION *************** JT PILEHEAD
WEIGHT PEN. CAPACITY MAX. CRITICAL CONDITION CAPACITY MAX. CRITICAL
CONDITION *MAXIMUM* O.D. THK. (INCL. WT) LOAD LOAD LOAD SAFETY
(INCL. WT) LOAD LOAD LOAD SAFETY UNITY LOAD CM CM KN M KN KN KN
CASE FACTOR KN KN KN CASE FACTOR CHECK CASE 101P PL1 106.68 2.50
177.4 40.0 -57792.1 -2139.6 -2139.6 OPR3 27.01 58144.3 5852.4
5852.4 STM2 9.94 0.15 STM2 102P PL2 106.68 2.50 177.4 40.0 -57772.9
-9529.9 -9529.9 STM1 6.06 58125.1 3864.2 3864.2 STM3 15.04 0.25
STM1 103P PL1 106.68 2.50 177.4 40.0 -57792.1 -10445.9 -10445.9
STM3 5.53 58144.3 3287.9 3287.9 STM1 17.68 0.27 STM3 104P PL2
106.68 2.50 177.4 40.0 -57772.9 -12057.1 -12057.1 STM2 4.79 58125.1
0.0 0.0 OPR1 100.00 0.31 STM2
---------------------------------------------------------------------------------------------------------------
-
Engineering Dynamics, Inc. Training 2011
Ship Impact Analysis - 1
Ship Impact Analysis Section 1 Create a ship impact analysis
directory and a collapse input file Step 1 Create the directory for
ship impact analysis Under Training Project, create Ship Impact
subdirectory; copy the model file sacinp.dat, seastate input file
seainp.dat, and psi input file psiinp.dat to the directory, and
make this directory current. Step 2 Modify model file and seastate
input file for collapse analysis Modify the model file: Divide the
member 402L-304X by add a joint IMPC at Z = -5.0 m; Add load case
SHIP w load ID SHIPIMPC: apply a 100.0 kN concentrated load at
joint IMPC in
the ()X direction.
Modify the seastate input file: Delete LCSEL and AMOD lines;
Delete all operating storm load cases and extreme storm load case
P000~P090 and S000~S090; Delete all load combinations; Add DEAD
load condition with selected weight groups for ANOD and WKWY.
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Engineering Dynamics, Inc. Training 2011
Ship Impact Analysis - 2
Step 3 Create the collapse input file CLPINP.CLP The unit of the
collapse input file: There is no place to define the unit for the
collapse input file. The program will use the same unit as whatever
defined in the structural model file. Collapse options: Member
segments 8 will be chosen along with 80 iterations allowed for both
load increment and
member iterations; Member local buckling check with API Bulletin
LRFD method will be included; Joint flexibility and joint strength
will be included; Pile plasticity will be included; Collapse
maximum deflection = 500 cm will be used with .005 strain hardening
ratio.
Collapse analysis report selections: Joint deflections and
member stresses will be printed out in the listing file for each
load
increment by selecting P1 for joint deflection print option and
M1 fore member stress print option;
Collapse and member summary report will be included in the
output listing file. Define load sequence: One Load sequence AAAA
defined for applying vertical loads and then ship impact loads;
Load case DEAD, EQPT, MISC, AREA will be added in one step; Load
case SHIP will be added in 50 steps for load factor of 50.0.
Elastic member groups can be defined using GRPELA line for
member groups W01, W02, DL6, DL7, DUM, and W.B.
Define the ship impact loads and energy: Add an IMPACT line to
define 1) the ship impact joint is IMPC: 2) the impact load case is
SHIP;
3) member denting is calculated per Ellinas formula and the
member dent B ratio is 8. Add an ENERGY line to define the ship
mass and velocity: Ship mass is 1100 tones with an
added mass coefficient of 1.4, and ship velocity is 1.2m/sec.
Collapse program will calculate the ship impact energy per API RP
2A Section C18.9.2a.
Collapse input file defined shall looks like following:
-------------------------------------------------------------------------------------------------------------
CLPOPT 80 8 80 LBJFPPJS LR 0.100.001 0.01 500. .005 CLPRPT P1 M1
SMMS LDSEQ AAAA DEAD 1 1.00EQPT 1 1.0MISC 1 1.0 LDSEQ AREA 1
1.00LIVE 1 0.75SHIM 50 50.0 GRPELA W01 W02 DL6 DL7 DUM W.B IMPACT
SHIP IMPC EX E 402L IMPC 8. ENERGY 1100. 1.4 1.2 END
-------------------------------------------------------------------------------------------------------------
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Engineering Dynamics, Inc. Training 2011
Ship Impact Analysis - 3
Section 2 Create the collapse analysis run file Step 1 Select
analysis type and sub-type Click Analysis Generator from Executive
window and select Statics for Type and Full Plastic
Collapse/Pushove for Subtype. The file Id of clp is chosen in the
analysis. Step 2 Select Analysis Options Check options for
Environmental Loading, Solve, Foundation, and Non-Linear /
Plastic.
Step 3 Select input files See below picture for the selected
options:
Section 3 Run the analysis and review the results Check the
results from collapse view:
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Engineering Dynamics, Inc. Training 2011
Ship Impact Analysis - 4
After a collapse analysis is finished, a collapse view file
clprst.clp will be created. Double click the file name, collapse
view program will open the file and many results can be checked on
the screen. Several reports, such as analysis history report, joint
report, member report, and work done report can be generated.
Collapse view also can show the structural damage graphically, see
the following pictures.
The parts of results also can be viewed by graphic curves.
Select the Total Energy Absorbed by structure as the output
parameter for X axis, the load step as the output parameter for Y
axis, and omit the final load increment from the graph, see the
followings.
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Engineering Dynamics, Inc. Training 2011
Ship Impact Analysis - 5
The curve is shown as below.
Check collapse output listing file: The listing file reports the
selected outputs, such as joint deflections and member stresses. It
also includes the total ship impact energy, and the energy absorbed
by structure at each load increment. Listing file also indicates
the structure damages.
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Engineering Dynamics, Inc. Training 2011
Ship Impact Analysis - 6
The following are parts of the listing file.
-----------------------------------------------------------------------------------------------------------------------
SHIP IMPACT SETTINGS 1. Impact energy calculated from ENERGY line:
1.11 (MJ) 2. Impact load condition: SHIM 3. Indentation joint: IMPC
4. Impact force X : -0.1000 (MN) Y : 0.0000 (MN) Z : 0.0000 (MN) 5.
Ship indentation curve: (none specified) 6. Automatic unloading:
OFF 7. Member for which denting energy is calculated :402L-IMPC 8.
Denting energy calculated using Ellinas formula . . ** SACS
COLLAPSE IMPACT ENERGY ABSORPTION ** INCREMENT 25 LOAD FACTOR
20.000 Aggregate Incremental (MJ) (MJ) Energy absorbed by structure
= 0.8649 0.3358 Energy absorbed by member = 0.0485 0.0000 * Limited
by B ratio Total absorbed impact energy = 0.9134 0.3358 % of total
energy absorbed = 82.3693 (%) 30.2828 (%) Member indentation =
0.0572 (M) 0.0000 (M) *** PLASTICITY OCCURRED ON MEMBER 402L-404L
AT LOAD STEP 25 *** PLASTICITY OCCURRED ON MEMBER 4100-404L AT LOAD
STEP 25 *** PLASTICITY OCCURRED ON MEMBER 4101-402L AT LOAD STEP 25
**** WARNING - EXCEEDED MAXIMUM ALLOWED DISPLACEMENT OR ROTATION
**** WARNING - STRUCTURE COLLAPSED ********
-----------------------------------------------------------------------------------------------------------------------
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse1
Extreme wave response
Get ready
1. Under Training Project create a Extreme wave response
subdirectory 2. Under Extreme wave response create Foundation SE,
Modes and Wave response
subdirectories. 3. Copy the Seastate file SEAINP.DAT, model file
SACINP.DAT and soil data PSIINP.DAT
from \Static PSI directory to Extreme wave response directory.
4. Copy SEAINP.DAT from \Static PSI directory to Extreme wave
response \Modes
directory 5. Copy Sacinp.dat from \Static PSI directory to
Extreme wave response\wave response
directory 6. Copy jcninp.inp from \Static directory to Extreme
wave response\wave response
directory 7. Set current directory to \Extreme wave
response.
Section 1 Create pile head super element
Step 1 Check the model
1. Check if the weight combination MASS has been created. If not
create the weight combination MASS with the basic weight groups
MISC, EQPT, AREA, and LIVE. The weight factors should be 1.0
2. If the weight combination MASS already exists, check the
weight factor for LIVE. If it is not 1.0 change it to 1.0.
3. Open seainp.dat file, and modify the file to contain only
operating conditions a. Remove load combination STM1, STM2 and STM3
b. Modify LCSEL line to contain only OPR1, OPR2 and OPR3 load cases
c. Remove AMOD lines d. Comments out Load Combination STM1, STM2
and STM3 e. Save the file
Step 2 Create the run file 1: Select analysis type
1. Change current directory to \Foundation SE 2. Analysis type:
Static 3. Analysis subtype: Create Pilehead Super Element 4. The
picture below shows the window after the analysis type is selected.
Please check the
default File ID and if it is not dat change it to dat.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse2
Step 3 Create the run file 2: Set Environmental Load Option
1. Check on Edit Environmental Loading Options and click to
change the options 2. Change Seastate Input in Model file to No 3.
Pick the ..\seainp.dat file in Seastate Input File field 4. See
below picture for the window after options are defined. Click OK to
save the
options.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse3
Step 4 Create the run file 3: Set PSI option
1. Click Edit Foundation Options to define the analysis options
for the pile head super element creation:
2. Pick ..\PSIINP.DAT file from PSI Input File field 3. Change
Foundation Superelement Option to Override - Create Pilehead SE 4.
Enter OPR1 and OPR3 to 1st X and 1st Y load cases respectively 5.
Change Pilehead Load/Defl. Option to Max load and deflection 6.
Keep other options unchanged 7. See below picture for the windows
after the options are defined. Click OK to save
the options.
Step 5 Select the input file(s) and run the analysis
1. Pick the model file ..\SACINP.DAT in Input File field and
Click-on Run Analysis to run the analysis. This analysis will
create the dynsef.dat file and this is the pile head super element
file needed for dynamic characteristic analysis.
2. See below picture for the Analysis Generator Window after the
options are defined.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse4
3. Click-on Run Analysis to run the analysis and check the
results. The summary of results are shown below
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse5
Seastate basic load case summary report for spectral fatigue:
-----------------------------------------------------------------------------------------------------------------------------------
****** SEASTATE BASIC LOAD CASE SUMMARY ****** RELATIVE TO MUDLINE
ELEVATION LOAD LOAD FX FY FZ MX MY MZ DEAD LOAD BUOYANCY CASE LABEL
(KN) (KN) (KN) (KN-M) (KN-M) (KN-M) (KN) (KN) 1 AREA 0.00 0.00
-405.00 0.0 674.9 0.0 0.00 0.00 2 EQPT 0.00 0.00 -2379.69 1513.0
6004.1 0.0 0.00 0.00 3 LIVE 0.00 0.00 -2474.99 0.0 4499.6 0.0 0.00
0.00 4 MISC 0.00 0.00 -233.79 -737.3 1553.0 0.0 0.00 0.00 5 P000
1476.51 -0.03 -8581.62 1.6 90919.3 0.3 14131.80 5513.30 6 P045
1074.28 1096.02 -8595.18 -62958.2 67540.8 547.9 14131.80 5506.54 7
P090 -3.53 1553.57 -8624.70 -89766.7 6266.1 806.7 14131.80 5513.45
8 S000 4960.04 -0.13 -8362.77 7.6 285640.6 0.5 14131.80 5706.54 9
S045 3595.07 3661.21 -8399.70 -207524.7 208737.9 2139.7 14131.80
5707.80 10 S090 -15.76 5199.34 -8506.35 -296081.1 5851.1 2838.2
14131.80 5708.30
-------------------------------------------------------------------------------------------------------------------------------------
Seastate combined load case summary report for spectral fatigue:
-----------------------------------------------------------------------------------------------------------------------------------
***** SEASTATE COMBINED LOAD CASE SUMMARY ***** RELATIVE TO MUDLINE
ELEVATION LOAD LOAD FX FY FZ MX MY MZ CASE LABEL (KN) (KN) (KN)
(KN-M) (KN-M) (KN-M) 11 OPR1 1624.16 -0.04 -14933.25 777.5 112742.9
0.3 12 OPR2 1181.70 1205.62 -14948.17 -68478.4 87026.5 602.6 13
OPR3 -3.88 1708.93 -14980.63 -97967.7 19624.3 887.3
-------------------------------------------------------------------------------------------------------------------------------------
Pile head superelement created for joint 101P for spectral
fatigue:
-----------------------------------------------------------------------------------------------------------------------------------
*** PILEHEAD STIFFNESS FOR JOINT 101P *** UNITS - (KN,M) FOR
SUPERELEMENT NO. 1 RX RY RZ DX DY DZ RX 0.557862E+06 -0.118292E+03
0.118292E+02 0.175698E+02 0.683788E+05 -0.683788E+04 RY
-0.118292E+03 0.568122E+06 -0.563122E+05 -0.707156E+05
-0.173959E+02 0.173959E+01 RZ 0.118292E+02 -0.563122E+05
0.106312E+05 0.707157E+04 0.173959E+01 -0.173959E+00 DX
0.175698E+02 -0.707156E+05 0.707157E+04 0.154072E+05 0.826751E+01
-0.826751E+00 DY 0.683788E+05 -0.173959E+02 0.173959E+01
0.826751E+01 0.275135E+05 0.132169E+06 DZ -0.683788E+04
0.173959E+01 -0.173959E+00 -0.826751E+00 0.132169E+06 0.133599E+07
-------------------------------------------------------------------------------------------------------------------------------------
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse6
Section 2 Create the mode shape and mass files Change the
current directory to Extreme wave response\Modes Step 1 Modify the
seainp.dat file for dynamic characteristic analysis
1. Remove LCSEL lines 2. Remove AMOD lines 3. Remove
HYDRO/HYDRO2 lines 4. Remove all the load cases and combinations 5.
Change Cd/Cm value for fatigue condition 6. Add DYNMAS line to
include weight combination MASS 7. Save As the file to Seainp.dyn
and file should look like following:
-------------------------------------------------------------------------------------------------------------
LDOPT NF+Z1.0280007.849000 -79.500 79.500GLOBMN FILE B CENTER CEN1
CDM CDM 2.50 .5 2.0 .8 2.0 CDM 250.00 .5 2.0 .8 2.0 MGROV MGROV
0.000 60.000 2.500 2.5400-4 1.400 MGROV 60.000 79.500 5.000
2.5400-4 1.400 GRPOV GRPOV LG1 F 1.501.501.501.50 GRPOV LG1 F
1.501.501.501.50 GRPOV LG1 F 1.501.501.501.50 GRPOV LG2 F
1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG2 F
1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOV LG3 F
1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOVAL PL1NN 0.001
0.001 0.001 GRPOVAL PL2NN 0.001 0.001 0.001 GRPOVAL PL3NN 0.001
0.001 0.001 GRPOVAL PL4NN 0.001 0.001 0.001 GRPOV W.BNF 0.001 0.001
0.001 0.001 0.001 DYNMAS MASS LOAD END
-----------------------------------------------------------------------------------------------------------
Step 2 Create the Dynpac input file (Use Datagen program)
1. In DYNOPT line select the following options: a. Number of
modes: 50 b. Mass calculation option: CONS c. Added mass
coefficient: 1.0 d. Leave other options default
2. In DYNOP2 line select the following weight contingency
factors: a. Dynpac calculated structural mass: 1.0 b. SACS load
mass: 1.0 (This doesnt apply to this training model) c. SACS IV
included weight mass: 1.0
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse7
3. Below is the content of this input file 4. Save as
dyninp.dyn
----------------------------------------------------------------------------------------------------------------------
DYNOPT +ZMN 50CONS7.84905 1.0 +X DYNOP2 1.0 1.0 1.0 END Step 3
Select the Retained Degrees of Freedoms
1. Change the directory to \Extreme wave response and open
SACINP.DAT file with Precede to define the retained DOFs for each
Plan:
2. Plan at -79.5: Retain X, Y, and Z translational DOF to joints
101L, 102L, 103L, 104L 1100, 1101, 1102, 1103, and 1104. The joint
fixity of 2 means retained degree of freedom. Go to Joint/Fixities
and select the above joints, then set new fixity to 222.
3. Repeat the same pattern to the Plan at -50.0, -21.0, and 2.0.
4. Plan at 15.3: Select joints 71BD, 7104, 71ED, 701L, 702L, 703L,
704L, 74BD, and 74ED.
Set the joint fixities to 222 5. Plan at 23.0: Set joint
fixities 222 for 801L, 802L, 803L, 804L, 81BD, 81FD, 84FD, and
84BD. 6. Save the model file after user has defined the retained
degree of freedoms.
Step 4 Run the analysis 1: Select analysis type
1. Change current directory to \Extreme wave response\Modes 2.
Change File ID to dyn 3. Analysis type: Dynamic 4. Analysis
Subtype: Extract Mode Shapes
Step 5 Run the analysis 2: Select environmental load option
1. Check Edit Environmental Loading Options and set the options
2. Set Seastate Input File In Model File to No 3. In Seastate Input
File field pick Seainp.dyn 4. Leave other options unchanged and
click-on OK. See picture below for details.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse8
Step 6 Run analysis 3: Select Solve option to pick up pile head
super element
1. Click Edit Solve Options to define analysis options 2. Change
Include Super element file to Yes 3. In Super element file field
pick pile heads super element file: this file is created in
last
Section and should be located in \Extreme wave
response\Foundation SE folder. 4. Leave other options unchanged and
click-on OK. 5. See picture below.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse9
Step 7 Run the analysis 4: Select Modal Extraction Options
1. Click on Edit Modal Extraction Options to define the options
for dynpac 2. Option 1: Use dynpac input file
a. Make sure Use Dynpac Input file option is Yes b. In Dynpac
Input File filed pick the dyninp.dyn . c. See picture below.
3. Option 2: User Analysis Options: a. Change Use Dynpac Input
File option to No b. Number of Modes: 50 c. Leave other options
unchanged and click on OK. d. See picture below.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse10
Step 8 Run the analysis 5: Select Graphical output options
1. Check on Graphical Post Processing to create the Postvue
database 2. Include Only Joint Displacements: Yes 3. Use OCI File
as Model Input: No 4. Click on OK when finished. 5. See picture
below.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse11
Step 9 Run the analysis 7: Select the model file and run the
analysis
1. In SACS Model File field pick SACINP.DAT file. This file is
located in \Extreme wave response folder.
2. See picture below for details.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse12
3. Click Run Analysis to run the analysis
Step 10 Check the results
1. Open Dynlst.dyn file to check the results. The summary is
listed below. 2. Double click-on PSVDB.DYN folder to open the
Postvue database. Go to Display/Shape to
view mode shapes graphically.
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse13
Dynpac weight summary report for spectral fatigue:
-----------------------------------------------------------------------------------------------------------------------------------
************* WEIGHT AND CENTER OF GRAVITY SUMMARY *************
************ ITEM DESCRIPTION ************ ************** WEIGHT
************** ******** CENTER OF GRAVITY ******** X Y Z X Y Z KN
KN KN M M M MEMBER ELEMENTS 13578.944 13578.944 13578.944 1.087
0.000 -33.155 MEMBER ELEMENT NORMAL ADDED MASS 8419.222 8348.488
2259.828 1.133 0.000 -54.331 FLOODED MEMBER ELEMENT ENTRAPPED FLUID
4599.347 4599.347 4599.347 0.615 0.000 -39.497 USER DEFINED WEIGHTS
IN DYNPAC 5493.467 5493.467 5493.467 2.443 -0.159 22.121
************ TOTAL ************ 32090.982 32020.248 25931.588 1.263
-0.027 -24.415
-------------------------------------------------------------------------------------------------------------------------------------
Dynpac first 10 modal periods and frequencies report for
spectral fatigue:
-----------------------------------------------------------------------------------------------------------------------------------
SACS IV-FREQUENCIES AND GENERALIZED MASS MODE FREQ.(CPS) GEN. MASS
EIGENVALUE PERIOD(SECS) 1 0.351679 9.6068325E+02 2.0480859E-01
2.8435048 2 0.409671 6.3659168E+02 1.5092797E-01 2.4409830 3
0.644671 3.7780218E+02 6.0948721E-02 1.5511799 4 0.734067
1.1268858E+03 4.7007686E-02 1.3622735 5 0.787909 4.6873639E+02
4.0802655E-02 1.2691825 6 0.983778 1.6494253E+03 2.6172574E-02
1.0164900 7 1.260474 2.7890749E+02 1.5943101E-02 0.7933526 8
1.484429 1.1532678E+03 1.1495324E-02 0.6736596 9 1.517697
1.0385447E+03 1.0996888E-02 0.6588928 10 1.725554 1.0121775E+02
8.5071294E-03 0.5795240
-------------------------------------------------------------------------------------------------------------------------------------
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse14
Section 3 Extreme wave response Step 1 Define analysis type
1. Change current directory to \Wave response 2. Change File ID
to Dat 3. Analysis type: Dynamic 4. Subtype: Extreme wave 5.
Check-on Foundation, Element Check, Tubular Joint Check and
Graphical Processing
from Analysis Options window. Step 2 Edit environmental loading
options
1. Seastate input in model file: No 2. Seastate input file:
\seainp.dat 3. Make load combinations basic: Yes 4. Leave others
unchanged and hit OK, see picture below
Step 3 Edit Dynamic wave options
1. Use wave response input file: No 2. Percent damping: 5.0 3.
Number of Iteration: 10 4. Number of modes: 20 5. Plot base
shear/overturning moment: Yes 6. Keep other unchanges and hit
O.K
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse15
7. See below picture for details
Step 4 Edit Foundation options
1. PSI input file: \psiinp.dat 2. Leave other option unchanged
and click-on O.K, See below for details:
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse16
Step 5 Edit element check options
1. Use Post Input file: No 2. Code Criteria: WSD AICS 9th/API
21st 3. Cb method: Calculate Cb based on end moments 4. Cm method:
Include Moment Magnification 5. Redesign option: No 6. Stress/code
check locations:
a. Non-segmented elements: 4 b. Segmented elements: 2
7. Report option: a. Joint Deflection: Yes b. Element details:
Yes c. End forces: Yes d. UC Ranges: Yes
8. Keep other options unchanged and click-on O.K, see below
picture for details.
Step 6 Edit Tubular check options
1. Use joint can input file: Yes 2. Joint Can input file:
Jcninp.dat 3. Click-on OK
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse17
Step 7 Select input files
1. SACS Model file: \sacinp.dat 2. Dynpac mode shape file:
\Modes\dynmod.dyn 3. Dynpac mass file: |Modes\dynmas.dyn 4.
Click-on Run Analysis to run, seen below picture
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EngineeringDynamics,Inc. Training2011
ExtremeWaveResponse18
Step 8 Check results
1. Check base shear/overturning moment response curves for
dynamic effect 2. Check Wave response results and compare with the
loads used for the pile head super
element 3. Check PSI results 4. Check Member code check results
5. Check Joint Can Code check results
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Engineering Dynamics, Inc. Training 2011
Tow Fatigue - 1
Tow Fatigue Get Ready
1. Under Training Project directory create a sub-directory and
name it to Tow Fatigue 2. Copy SACINP.DAT model file from Spectral
Fatigue directory to Tow Fatigue directory.
Section 1 Modifying Model file Step 1 Modify the structure and
only leave the jacket structure in the model file Delete all
structural members above EL (+) 3.0, keep joints 501L, 502L, 503L,
and504L. Delete all piles, conductors, w.b and dummy members in
conductor framing. Use Misc/Check Model to check the model and
delete unused joints and member groups and sections. Step 2 Modify
the applied weights Delete weight group EQPT from DataGen. Only
leave weight group ANOD, WKWY, and LPAD in the model. Step 3 Rotate
the structure and add transportation support cans Use Display/Zoom
Box/Translate and Rotate to rotate the structure around Row 1 (-)
90 degrees. The type of translate and rotate is About a Line, the
selection criteria is All, click Apply to rotate the structure,
then move the structure up with Z = 81.25 m and in X direction with
X = 7.5 m, see the following pictures.
The structure now is in a horizontal position.
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Engineering Dynamics, Inc. Training 2011
Tow Fatigue - 2
Add joints S111, S113, S121, S123, S131, S133, S141, and S143
1.75m below the joints 101L, 103L, 201L, 203, 301L, 303L, 401L, and
403L. The fixities of added joints are 111000. Add members with
group name of CAN to connect the joints S111 to 101L, S113 to 103L,
S121 to 201L, S123 to 203L, S131 to 301L, S133 to 303L, S141 to
401L, and S143 to 403L; Define the group property as OD = 30 and
WTHK = 1.0; Input the member offset as Z = -61.60 cm at the top of
the member. The revised jacket structure is shown as below.
Section 2 Create a Tow Input file and Perform the Tow Analysis
Step 1 Create a file containing RAOs Eight (8) direction RAOs will
be input at center of motion X = -38.00 m, Y = 0.25 m and Z = 0.0
m. There RAOs are corresponding to direction 000, 045, 090, 135,
180, 225, 270 and 315. The part of added RAO lines is shown below:
-------------------------------------------------------------------------------------------------------------
RAO HEAD -38.0 0.25 0.00 R000 DP RAO DP40.0 0.798-90.5 0.008-1.6
0.32 6.42 0.0130.02 0.367-84.6 0.03398.7
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Engineering Dynamics, Inc. Training 2011
Tow Fatigue - 3
RAO DP39.0 0.796-90.4 0.006-2.4 0.3186.58 0.013-1.07 0.348-85.4
0.03397.8 RAO DP 6.0 0.025-68.1 -70.0 -56.1 -71.5 0.016-65.9
0.003113.0 RAO DP 5.0 0.007-7.08 -7.9 175.0 -9.95 0.007-6.25 173.0
RAO HEAD 45.