DET NORSKE VERITAS 1 SESAM Structure, pile, soil and DNV Software – Genie Jacket Integrated Analysis Revised 6 September 2011 wave analysis in GeniE SESAM User Course in integrated design analysis of jackets Genie Workshop: Model and analyse the jacket when subjected to wave loads • The purpose of this workshop is to guide the user in how to model a small 4-legged jacket with a simplified topside structure on top. The jacket is fixed with 4 piles for a given environment condition (the soil layers). Furthermore, the analysis also assumes a given wave load condition. • The workshop also addresses how to perform the integrated analysis including both the hydrodynamic analysis (running Wajac in the background), the non-linear pile-soil analysis (running Splice in the background) and finally the structure analysis using Sestra (also in the background). • Details on how to transfer data to Framework for code checking is also covered at the end of the workshop. • The objectives of this workshop is thus to steer the user through one way of doing integrated analysis. Other workshops focus more details on modelling aspects. • The workshop is accompanied with a pre- defined journal file. This file may be read into GeniE to recreate the same model as described herein. The journal file contains comments so it is easy to understand which commands create which parts of the model. Part 0 - General • This workshop should be viewed on-line or on colour print out to best see the property colour coding. • It is required that you have the following programs in addition to GeniE: Wajac, Splice, and Sestra. You should also have the program versions (or later) as found on the Sesam Download per March 2011 and the GeniE D6.0-00 (or later). A picture of the complete model – one wave load condition is shown
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DET NORSKE VERITAS 1
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
SESAM User Course in integrated design analysis of jackets
Genie Workshop:
Model and analyse the jacket when subjected to wave loads
• The purpose of this workshop is to guide the
user in how to model a small 4-legged jacket
with a simplified topside structure on top. The
jacket is fixed with 4 piles for a given
environment condition (the soil layers).
Furthermore, the analysis also assumes a given
wave load condition.
• The workshop also addresses how to perform
the integrated analysis including both the
hydrodynamic analysis (running Wajac in the
background), the non-linear pile-soil analysis
(running Splice in the background) and finally
the structure analysis using Sestra (also in the
background).
• Details on how to transfer data to Framework
for code checking is also covered at the end of
the workshop.
• The objectives of this workshop is thus to steer
the user through one way of doing integrated
analysis. Other workshops focus more details
on modelling aspects.
• The workshop is accompanied with a pre-
defined journal file. This file may be read into
GeniE to recreate the same model as described
herein. The journal file contains comments so it
is easy to understand which commands create
which parts of the model.
Part 0 - General
• This workshop should be viewed on-line or on colour print out to best see the property
colour coding.
• It is required that you have the following programs in addition to GeniE: Wajac, Splice, and
Sestra. You should also have the program versions (or later) as found on the Sesam
Download per March 2011 and the GeniE D6.0-00 (or later).
A picture of the complete model –
one wave load condition is shown
DET NORSKE VERITAS 2
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Please note:
• The pictures created by Genie are shown using
either a white background
(View|Options|General|Paper Background) or a
screen based background. These may be different
from your background.
• Any of the structures are fictitious.
• Any of the names referred to assumes
import of the pre-defined journal file. Depending on
how you model, the naming may be different. This
has no impact to the usefulness of the model.
• For further details on the commands, pulldown
menus etc. used in this tutorial:
Part 2, see Vol. 1 of the User Manual
Part 3-6, see Vol. 2 of the User Manual
Part 0 - General
Content of workshop:
• Part 1: Describes the main dimensions for the
jacket and deck, pile types, soil properties,
sections and materials and the wave loads
• Part 2: Gives hints on how to make the structure
• Part 3: Focuses on pile and soil modelling
• Part 4: The wave loads are modelled
• Part 5: Making basic loadcases and load
combinations
• Part 6: The integrated analysis is run
• Part 7: Some examples on how to present results
in GeniE
DET NORSKE VERITAS 3
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Main dimensions
• Main units are in meters, KN and
tonne – there is one material type
(see bottom of this page for details)
• The main dimensions of the jacket
is shown to the right.
• The jacket has 4 legs
• Notice the cone transition just
above elevation +75 meters
• The sections, thicknesses and
materials used are listed below
• A total of 7200 tonnes is distributed
as point masses on the topside
0
5
40
75
105
143 138
135
45 35
20
15
80
Cone
length
= 3
Part 1 - Dimensions
Name Diameter Thickness
Pipe06 0.6 0.01
Pipe12 1.2 0.03
Pipe16 1.6 0.03
Pipe21 2.1 0.08
Pipe22 2.2 0.08
Pipe32 3.2 0.09
Name Yield Density Young Poisson Thermal Damping
Steel 3.56E5 7.85 2.1E8 0.3 1.2E-5 0
Name Thickness
Th2 0.02
Th4 0.04
Th6 0.06
DET NORSKE VERITAS 4
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Pile details
• There are 4 piles
• Each pile extends from elevation -
100meters to bottom of leg at
elevation 0 meters
• The pile may very well be extended
above elevation +0 meters, i.e. to
be an inner pile of the leg.
Part 1 - Dimensions
Sublayers
1
1
1
3
15
3
0 -1.5
-14.5
-5.5 -3.5
-70
-100
-75
Pile diameter = 2.1 m
thickness = 0.08 m
Leg
Pile
Typ
e
Den
sity
of m
atte
r
insid
e p
ile
Pile
tip is
free
/fixe
d?
PileType1 1 *
*: Pile is assumed to be
infinitely long beneath the tip
DET NORSKE VERITAS 5
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Soil details
Part 1 - Dimensions
Soil Type Soil Data
Sand1 SoilData1
Sand1 SoilData2
Sand2 SoilData3
Clay3 SoilData4
Clay4 SoilData5
Sand5 SoilData6
0 -1.5
-14.5
-5.5 -3.5
-70
-100
-75
Pile
So
il Typ
e
An
gle
inte
rna
l
frictio
n
De
nsity
Op
en
ga
p?
Ove
r-co
nso
lida
tion
ratio
Resid
ua
l/peak
skin
frictio
n ra
tio
Sand1 40 1.99 No 1 1
Sand2 36 1.99 No 1 1
Sand5 37 2.04 No 1 1
So
il Typ
e
Su
z1
(0)
Su
z2
(10
0)
Den
sity
Stra
in a
t ha
lf ma
x
stre
ss
J-fa
cto
r
Op
en
ga
p?
Ove
r-co
nso
lida
tion
ratio
Resid
ua
l/peak
skin
frictio
n ra
tio
Clay3 200 100 1.94 0.01 0.5 No 1 1
Clay4 300 130 1.94 0.01 0.5 No 1 1
• Soil types - sand
• Soil types – clay
DET NORSKE VERITAS 6
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Soil details
• Soil curves:
p-y according to API 1987
t-z according to API 1993
q-z according to API 1993
• Scour
General scour = 0.5
Local scour around piles = 1
Slope of local scour = 20
• Soil data (skin friction and tip
resistance) as given below
Part 1 - Dimensions
So
il Data
Initia
l va
lue
of s
oil s
he
ar
mo
du
lus
So
il Po
isson
ratio
Skin friction Tip resistance
Pe
ak s
kin
frictio
n in
co
mp
ressio
n
Pe
ak s
kin
frictio
n in
ten
sio
n
Ratio
be
tw. d
ispl. to
rea
ch
pe
ak s
kin
frictio
n a
nd
pile
dia
m.
Pe
ak tip
stre
ss
Ratio
be
tw. d
ispl. to
rea
ch
pe
ak tip
stre
ss
an
d p
ile d
iam
.
SoilData1 -1 0.5 5 3 0.01 - -
SoilData2 -1 0.5 15 11 0.01 - -
SoilData3 -1 0.5 45 45 0.01 - -
SoilData4 -1 0.5 200 200 0.01 - -
SoilData5 -1 0.5 250 250 0.01 - -
SoilData6 -1 0.5 120 120 0.01 30000 0.05
DET NORSKE VERITAS 7
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Wave & wind load details
• Still water level at +124 meters
• Current always along with all wave
headings
• The waves to be used (for all loadcases calculate
maximum base shear and overturning moment)
• The marine growth (to be added to inertia force)
• Wind loads
Apply on topside constant wind force North 5 KPa (negative y-direction),
East 7 KPa (negative x-direction), South 6 KPa (positive y-direction),
North 9 KPa (positive X-direction)
• Make load combinations whereby all wave loads have factor 1.6, buoyancy has
factor 1.0, Gravity has factor 1,2 and wind loads have factor 1.6.
Part 1 - Dimensions
Sea Elevation Velocity
+30 m 1.1 m/s
0 m 1.1 m/s
-44 m 0.5 m/s
-124 m 0.5 m/s
Period (sec) Wave height (m) Phase (deg) Direction (deg) Wave theory
14 s 26 m -60 deg 270 deg (North) Airy
12 s 15 m -60 deg 180 deg (East) Stokes5
14 s 28 m -60 deg 90 deg (South) Stokes5
15 s 27 m -60 deg 0 deg (West) Stokes5
Calm Sea
Elevation Thickness (m) Roughness height (m) Density factor
0 m 0.1 m 0 1
-24 m 0.1 m 0 1
-124 m 0.01 m 0 1
DET NORSKE VERITAS 8
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 1: Define sections and
material
• Start GeniE and open new
workspace (Ctrl+N) with units:
m and kN (and hence tonne)
• Create pipe sections:
Edit > Properties
in Section tab click
and create sections:
• Create thicknesses: Edit >
Properties, in Material tab click
and create thicknesses:
• Create material in similar way:
Part 2 – Modelling the structure
Name Diameter Thickness
Pipe06 0.6 0.01
Pipe12 1.2 0.03
Pipe16 1.6 0.03
Pipe21 2.1 0.08
Pipe22 2.2 0.08
Pipe32 3.2 0.09
Name Yield Density Young Poisson Thermal Damping
Steel 3.56E5 7.85 2.1E8 0.3 1.2E-5 0
Name Thickness
Th2 0.02
Th4 0.04
Th6 0.06
DET NORSKE VERITAS 9
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 2: Define guideplanes at
top and bottom elevations
• Insert guiding planes at bottom and top
of legs:
Guiding Geometry|Planes| Guide Plane
Dialog
Plane at top og legs (LegTop) at
Z coordinate 138 with X and Y
spanning from (-10,-7.5) to
(10,7.5) Use 1 for spacings in x
and y
Plane at bottom of legs
(LegBottom) at Z coordinate 0
with X and Y spanning from
(-22.5,-17.5) to (22.5,17.5)
Use 1 for spacings in x and y
Part 2 – Modelling the structure
DET NORSKE VERITAS 10
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 3: Model the main legs
• In upper right area of GUI set defaults:
Section: Pipe32
Material: Steel
Like this:
• Create the 4 legs:
Insert|Beam|Straight Beam
(or press in the upper left of
the GUI)
Click lower and upper ends of
each leg
(notice highlighting of the snap
point)
• With ‘Default display’
(upper middle area of GUI)
the model is displayed
as shown to the right
Guiding planes are no longer
needed so change display type
to ‘Modelling - Structure’
Part 2 – Modelling the structure
DET NORSKE VERITAS 11
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 4: Using the journal file
• When modelling, GeniE will
automatically create a JavaScript log
(the journal file or the js-file).
• Notice the JavaScript log of commands
in the lower area of GUI:
• This log is also found in a file named
workspace-name.js
You may edit this file and use it
as a Command File in a new
session (File|Read Command
File)
• Alternatively to clicking menus and
buttons you may type commands.
Having typed a couple of characters hit
Tab key to get box with alternatives.
Help is provided as you continue
typing.
• The log file contains all actions you
perform. If you want a journal file
without any history (a “clean journal
file”) you may create such file by
File|Export|Genie journal file (JS file).
This file is ideal for backup
purposes and also when
recreating the model using
newer program versions of
GeniE.
Part 2 – Modelling the structure
DET NORSKE VERITAS 12
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 5: Make the lowest horizontal
elevation
• Add elevations for bracings by using
Snap Plane:
Change Snap Perpendicular to
Snap Plane
Press Snap Plane
Give Z-coordinate of lowest
elevation
• Set default section to Pipe16:
• Use snap points at intersection
between legs
and Snap Plane to create horizontal
bracing
• Close Snap Plane dialog and create
horizontal X-bracing
Part 2 – Modelling the structure
DET NORSKE VERITAS 13
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 6: Make the lowest elevations
• Create each diagonal bracing from
elevation 5 to 40 as follows:
Press beam button
and click
lower end (1)
Press Snap Plane and give Z =
40
Click upper end (2) and beam
appears
• Continue this process to create all X-
bracing (all with Pipe16) between
elevations 5 and 40 as well as between
elevations 40 and 75
• In this process open and close Snap
Plane when necessary
• Create horiz. X-bracing at elevations
40 and 75
• Model at this stage:
Part 2 – Modelling the structure
Elev. 5
Elev. 40
Elev. 75
DET NORSKE VERITAS 14
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 7: Make the upper elevations
• Set default section to Pipe12
• Use Snap Plane first at elevation 105
and then at 135 to create horizontal
bracing
• Close Snap Plane and create all X-
bracing between 75 and 105 and
between 105 and 135
• Create T-bracing between 105 and 135:
Change Snap Plane to
Snap Perpendicular
Press Snap Perpendicular
Click X-joint (end 1) and see
midpoint of horizontal bracing
highlighted as end 2:
Model at this stage
Lift Snap Perpendicular
Part 2 – Modelling the structure
Snap Plane
intersects leg
Elev. 75
Elev. 105
Elev. 135
DET NORSKE VERITAS 15
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 8: Change the upper leg
• Change section for legs by segmented
modelling
Double-click a leg
Select and use RMB to Divide
At 80 m
Select upper segment and
Divide At 3 m
Select upper segment and use
RMB and Properties to change
section from Pipe32 to Pipe22
Create a cone section in same
way as for other sections and
assign this to short middle
segment
Repeat for other legs
Part 2 – Modelling the structure
DET NORSKE VERITAS 16
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 9: Complete the jacket
structure
• Set default section to Pipe16
• Create horizontal X-bracing at
elevations 105 and 135
• Change default section to Pipe22
• Create vertical stub at top of leg:
Insert|Beam|Straight Beam
Dialog
Click in End 1 field to put focus
there
Click top of leg to insert this
point in End 1
Repeat for End 2
(or cut and pasted from End1
field)
Adjust End 2 by adding 5 m to
Z-coord.
Click OK to create stub
• Copy stub to other three leg tops
Select the vertical stub
Use RMB and Copy
Click Translation vector field
Click from-to points to
insert proper vector
Part 2 – Modelling the structure
DET NORSKE VERITAS 17
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 10: Make the conductors
• Set default section to Pipe16
• Use Snap Plane Y=3 to
create conductor support
• Copy the conductor support to all
elevations
Use X-joints as from-to points
to insert proper vertical
Translation vector in Copy
dialog
Part 2 – Modelling the structure
Horizontal X-bracings
only shown
‘From-point’
and ‘to-point’
gives vertical vector:
Vector3d(0 m,0 m,-30 m)
that creates proper copy
Snap Plane
intersects
X-bracing
Copy
DET NORSKE VERITAS 18
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 10: Make the conductors
• Set default section to Pipe06
• Create first conductor:
Insert|Beam|Straight Beam
Dialog
Give data:
• Copy first conductor 2m in X-dirextion
twice:
Use Preview to confirm
before Apply
(You may also specify this as
default appearance from
View|Options|General)
Part 2 – Modelling the structure
DET NORSKE VERITAS 19
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 10: Make the conductors
• Conductors contribute with hydrodynamic forces but no stiffness:
Edit|Properties, Beam Type tab, click Create/Edit Beam Type, Nonstructural
tab, create a non-structural beam type (name only with no data)
Select the three conductors
In Properties > Beam types folder select non-structural beam type name and
use RMB to Apply Beam type to selection
• The bottom part of the conductors need to be supported in order to avoid
singularity in analysis
You use Insert|Support|Support Point Dialoge
Part 2 – Modelling the structure
DET NORSKE VERITAS 20
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 11: Make the topside
• Create lower deck (Th6):
Insert|Plate|Flat Plate Dialog
Give coordinates
for 4 corner points:
» Click 1st entry
» Click points 1, 2, 3 and 4
» Click twice to edit entries, X-values as shown
Click Apply
Part 2 – Modelling the structure
4th corner point
DET NORSKE VERITAS 21
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 11: Make the topside
• Copy lower deck twice:
9 m up (middle deck) and 17 m
up (upper deck)
• Create wall (Th4) in YZ plane:
Insert|Plate|Flat Plate
(or press in the
upper left of the GUI)
Click 4 corner points:
• Copy first vertical wall three times
• Create wall (Th2) in XZ plane
where conductors hit lower deck
Part 2 – Modelling the structure
1 2
3 4
DET NORSKE VERITAS 22
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 11: Distribute the additional
topside mass
• This tutorial assumes distribution of
additional masses by means of point
masses.
• You insert the mass points by using
Insert|Mass
Click in the position field first
before you click on the position
on the model
• The rest of the point masses are added:
Part 2 – Modelling the structure
DET NORSKE VERITAS 23
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 11: Make sets for use in
hydrodynamic modelling and
code checking
• Select graphically the relevant parts,
RMB > Named Sets and make named
sets for
Jacket
Legs
Topside
Part 2 – Modelling the structure
DET NORSKE VERITAS 24
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 11: Control the mesh of the
topside
• GeniE will produce a default mesh of
the topside
Notice the node positions where
the conductors are connected
• You may decide to control it by using
Feature Edges
Insert|Feature Edge
• One way of doing it is as shown below
This is not necessary, but it
gives you an idea on how to
control the mesh
Click in the first input field and
then on the model where the
conductor intersect the bottom
plate. Subtract -10.5 meters in
the y-direction
Do the same for input field
number 2, but add 4.5 meters in
the y-direction
Copy the feature edge (select,
RMB, and copy) to the other
conductor intersections
Part 2 – Modelling the structure
DET NORSKE VERITAS 25
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 11: Control the mesh of the
topside
• Copy feature edges Fedge1-3 to the
decks above
• Add vertical feature edges as shown
• The finite element mesh now becomes
The yellow dots indicate point
masses on the FE model
Part 2 – Modelling the structure
DET NORSKE VERITAS 26
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 12: Define the piles
• Piles are basically the same as beamS, but they
need additional information – “pile
characteristics”
• Select Edit|Properties > Pile Characteristics,
define the PileType1 and give the input data as
shown
• You may change the properties from the browser
as shown (select PileType1 and RMB)
Part 3 – Modelling the pile & soil
Pile
Typ
e
Den
sity
of m
atte
r
insid
e p
ile
Pile
tip is
free
/fixe
d?
PileType1 1 *
*: Pile is assumed to be
infinitely long beneath the tip
DET NORSKE VERITAS 27
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 12: Define the piles
• Set section Pipe21 to default
• Switch modelling mode from beams to piles
• Make the first pile by the following sequence:
Click on the start point, in this case the
bottom part of the leg
GeniE will then ask you for the lower z-
elevation of the pile, please enter -75
meters
GeniE now expects you to define the
orientation of the pile. You move the
mouse over the beam as shown and when
clicking GeniE inserts the pile in it’s
correct position
» Notice the colour of the beam when moving the mouse over it.
• Select Pile1 and apply the PileType1 to it
• Define piles Pile2-4 in the 3 other corners by
following the same procedure as described
above.
Part 3 – Modelling the pile & soil
DET NORSKE VERITAS 28
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 12: Define the piles
• At this stage the model looks like
The section types are colour coded
View|Options > Colour Coding >
Category > Property
name > section
palette > default
Check the Enable color coding button:
Part 3 – Modelling the pile & soil
DET NORSKE VERITAS 29
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 13: Define the soil data
• Define the scour. Open the Environment tab in
the browser, select Soil, RMB and select New
Scour. The data are as follows
Scour
» General scour = 0.5
» Local scour around piles = 1
» Slope of local scour = 20
• Define sand types
Sand1, Sand2, Sand5
Select New Sand as shown above
Part 3 – Modelling the pile & soil
So
il Typ
e
An
gle
inte
rna
l
frictio
n
Den
sity
Op
en
ga
p?
Ove
r-co
nso
lida
tion
ratio
Resid
ua
l/peak
skin
frictio
n ra
tio
Sand1 40 1.99 No 1 1
Sand2 36 1.99 No 1 1
Sand5 37 2.04 No 1 1
DET NORSKE VERITAS 30
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 13: Define the soil data
• Define clay types
Clay3 and Clay4
Select New Clay as shown
on previous page
• Define the soil curve
p-y according to API 1987
t-z according to API 1993
q-z according to API 1993
Select New Soil Curve as
shown on previous page
Part 3 – Modelling the pile & soil
So
il Typ
e
Su
z1
(0)
Su
z2
(10
0)
Den
sity
Stra
in a
t ha
lf ma
x
stre
ss
J-fa
cto
r
Op
en
ga
p?
Ove
r-co
nso
lida
tion
ratio
Resid
ua
l/peak
skin
frictio
n ra
tio
Clay3 200 100 1.94 0.01 0.5 No 1 1
Clay4 300 130 1.94 0.01 0.5 No 1 1
DET NORSKE VERITAS 31
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 13: Define the soil data
• Define the soil data
The parameters for
SoilData1-6 are shown
below
Select New Soil Data
as shown on previous
page
• From the browser you have access to all
the soil parameters
You may change, rename, delete
and do graphical manipulations
like e.g. colour coding
Part 3 – Modelling the pile & soil
So
il Data
Initia
l va
lue
of s
oil s
he
ar
mo
du
lus
So
il Po
isson
ratio
Skin friction Tip resistance
Pe
ak s
kin
frictio
n in
co
mp
ressio
n
Pe
ak s
kin
frictio
n in
ten
sio
n
Ratio
be
tw. d
ispl. to
rea
ch
pe
ak s
kin
frictio
n a
nd
pile
dia
m.
Pe
ak tip
stre
ss
Ratio
be
tw. d
ispl. to
rea
ch
pe
ak tip
stre
ss
an
d p
ile d
iam
.
SoilData1 -1 0.5 5 3 0.01 - 0.05
SoilData2 -1 0.5 15 11 0.01 - 0.05
SoilData3 -1 0.5 45 45 0.01 - 0.05
SoilData4 -1 0.5 200 200 0.01 - 0.05
SoilData5 -1 0.5 250 250 0.01 - 0.05
SoilData6 -1 0.5 120 120 0.01 30000 0.05
DET NORSKE VERITAS 32
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 14: Define a location
• All the environmental data (air, soil, water)
needs to be assembled in a location
The location is defined by selecting
Environment and RMB.
The location name in this tutorial is
Location1.
• Air data: Use the default values provided by the
program. There will be no wind load
calculations.
Notice the on-line help function
• Water data: Use the default
values provided by the
program and use waterline
at elevation +124 m.
Part 3 – Modelling the pile & soil
DET NORSKE VERITAS 33
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 14: Define a location
• The soil data lists the connection
between soil type, soil curves
and soil data.
Part 3 – Modelling the pile & soil
0 -1.5
-14.5
-5.5 -3.5
-70
-100
-75
Pile
Soil Type Soil Data Sublayers
Sand1 SoilData1 1
Sand1 SoilData2 1
Sand2 SoilData3 1
Clay3 SoilData4 3
Clay4 SoilData5 15
Sand5 SoilData6 3
DET NORSKE VERITAS 34
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 14: Define a location
• The model now contains data for structure, pile
and the soil.
The soil is shown with colour codes
• You may change the data by selecting
Location1, RMB
Part 3 – Modelling the pile & soil
DET NORSKE VERITAS 35
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 15: Define the
hydrodynamics
• The following data will be defined
Current
Wave sets
Wave load conditions
Morison coefficients
Marine growth
Flooding parameters
• Notice that the data pertaining to the
structure is defined from Property >
Hydro browser, while the remaining
data are given from Environment >
Water browser. Use RMB in both
cases.
• Define the current CurrentProfile1
From browser Environment >
Water > New Current profile
The details are listed in Part 1
– Wave load details
Part 4 – Modelling the wave data
DET NORSKE VERITAS 36
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 15: Define the
hydrodynamics
• Define the wave set WaveSet1
From browser Environment >
Location and then choose
water
The details are listed in Part 1
– Wave load details
Part 4 – Modelling the wave data
DET NORSKE VERITAS 37
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 15: Define the
hydrodynamics
• Define the wave load condition
Condition1
From browser Environment >
Location1 > New Wave Load
Condition
The details are listed in Part 1
– Wave load details
Part 4 – Modelling the wave data
When selecting Waveset1
all data are filled in
Notice pulldown –
click the cell to access this feature
DET NORSKE VERITAS 38
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 16: Define hydro properties
applied to structure
• Define the Morison Coefficients
and apply to the jacket
From browser
Properties > Hydro >
Morison
Use default values
• Apply to named set
Jacket
Select the Jacket from
browser Utilities < Sets
Select the Morison coefficient
from browser Properties >
Hydro and apply to selection
Part 4 – Modelling the wave data
DET NORSKE VERITAS 39
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 16: Define hydro properties
applied to structure
• Define the marine growth parameters
and apply to complete jacket
From browser
Properties > Hydro >
Marine growth
Use full flooding
Use same procedure as
shown on previous
page to apply to the
named set Jacket
Part 4 – Modelling the wave data
DET NORSKE VERITAS 40
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 16: Define hydro properties
applied to structure
• Define the Flooding parameters
Flooding1 and apply to the named set
Legs1
From browser
Properties > Hydro >
New Flooding
Use full flooding
Use same procedure as
shown on previous
page to apply to the
named set Legs
• You may change the settings from the
browser Properties > Hydro
Part 4 – Modelling the wave data
DET NORSKE VERITAS 41
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 17: Define basic loadcases
• This model contains both basic
loadcases (manually applied), those
automatically created from the wave
load analysis and the load
combinations
• There are in total 4 basic loadcases
describing static wind loads and a
gravity loadcase
Gravity
WindN – pressure 5 KPa
WindE – pressure 7 KPa
WindS – pressure 6 KPa
WindW – pressure 9 KPa
• Insert a loadcase by defining the
loadcase and apply properties to it
• For the wind load cases the pressure
intensities are applied as shown on
next page. Before applying the
pressure loads, make sure you make
the right loadcase to be the current
loadcase
Example shows setting WindN
as current
Part 5 – Making the load cases
Select, RMB and choose Properties
DET NORSKE VERITAS 42
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 17: Define basic loadcases
• Add pressure load to loadcase WindN
Set loadcase WindN to current
Insert|Explicit Load|Surface
Load
Specify Normal pressure 5 KPa
Define explicit load name
Wind1
Notice the direction of pressure
load according to the right
hand rule
Click at first corner point
coordinate
Then click on actual point in
model (1) below
Continue with points 2, 3 and 4
Click OK
• To verify the load select loadcase
WindN from browser, RMB and
properties
Total force is Fy = -4080 KN
More details may be found
under the tab Loads
Part 5 – Making the load cases
1
2
3
DET NORSKE VERITAS 43
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 17: Define basic loadcases
• Add pressure load to loadcase WindE,
WindS, WindW as follows
Part 5 – Making the load cases
WindE, Fx= - 1785 KN
WindS, Fy= 4896 KN
WindW, Fx= 2295 KN
DET NORSKE VERITAS 44
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 18: Make an analysis activity
• Prior to making the wave load cases it
is necessary to define and activity
Select Activities from browser,
RMB and New Analysis
Specify the name Analysis1
and make sure you tick off
Wave Load Activity and
Pile Soil Analysis.
You are also prompted to
specify which wave load
condition to run
This predefined workflow
process will do all the
necessary steps to perform an
integrated structure – wave –
pile – soil analysis
Before the analysis can be run
it is necessary to add some
control data for the wave load
run.
Select the Wave Load Analysis
as shown to the right
Fill in the whole table as
shown on next page by
clicking Fill all
Part 5 – Making the load cases
DET NORSKE VERITAS 45
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 19: Define the wave load run
• Change details for step length, number of steps
Part 5 – Making the load cases
• A total of 9 wave load cases will be generated
Direction 270 deg WLC1 & 2 (max shear and moment respectively, north direction)
Direction 180 deg WLC3 & 4 (max shear and moment respectively, east direction)
Direction 90 deg WLC 5 & 6 (max shear and moment respectively, south direction)
Direction 0 deg WLC 7 & 8 (max shear and moment respectively, west direction)
Calm sea WLC9
and how many loadcases to be
exported to the structural
analysis
buoyancy calculations
only for calm sea
no design loads
for calm sea
DET NORSKE VERITAS 46
SESAM Structure, pile, soil and
DNV Software – Genie Jacket Integrated Analysis
Revised 6 September 2011
wave analysis in GeniE
Step 20: Make load combinations
• The load combinations are made as combinations from the various basic and
wave load cases, the table below explains the combinations
• You define a loadcombination from Insert|Load Combination