R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C Page 1 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue Stern A-Frame and Foundation R/V SIKULIAQ Maximum Capability Document Manufactured by: Allied Systems Co. Reference Drawing Number: # 76033 Prepared By: Allied Systems Co. Igor V. Kormishkin 11/11/2015 (rev.C)
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R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 1 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
Stern A-Frame and Foundation
R/V SIKULIAQ
Maximum Capability Document Manufactured by: Allied Systems Co.
Reference Drawing Number: # 76033
Prepared By: Allied Systems Co. Igor V. Kormishkin 11/11/2015 (rev.C)
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 2 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
1. Abbreviations
DLT Design Line Tension MCD Maximum Capability Document MPT Maximum Permissible Tension NBL Nominal Breaking Load NSF National Science Foundation UNOLS University-National Oceanographic Laboratory System
2. Purpose
This document sets the Maximum Permissible Tension (MPT) for the stern A-Frame installed onboard the vessel R/V Sikuliaq in accordance with the UNOLS Research Vessel Safety Standards (RVSS), Appendix B.
The tension member employed in the system is considered a component of the entire handling system and shall be used in accordance with Appendix A. The normal breaking load (NBL) of the tension member shall be less than the MPT with exceptions as outlined in RVSS Appendix B, Section B.4.
Associated MCDs for this component are:
x Port Flag Bock x Starboard Flag Block x Underdeck Winches x Additional wet gear rigging to be added as necessary
2.1. Deployment Types
This stern frame will potentially be used for the following types of deployments:
Towing – Surface Y
Towing – Mid-Water Y
Towing – Deep Water Y
Station Keeping – Surface Y
Station Keeping – Mid-Water Y
Station Keeping – Deep Water Y
See Reference 3.2.3, Section B.3.5 for descriptions of operations
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 3 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
3. General
3.1. Description and Limitations
This document is developed for the captain and crew of the R/V Sikuliaq to provide guidance on the acceptable loading conditions for the stern A-Frame. Due to the complex nature of oceangoing research and the highly variable loading conditions that may be encountered, a number of assumptions were made in order to develop this general purpose tool:
1. The maximum permissible tensions (MPT) are valid with the A-Frame resting in either of its two aft stop positions. Caution is advised for luffing operations near the limit of the padeye MPTs, as line tension held by winches located on the aft Main Deck can result in A-Frame overloading.
2. The geometry angles are defined per Section 4. All calculations were performed assuming zero initial heel and list. Any initial heel and list needs to be accounted for when monitoring the loaded cable angle into the water.
3. Vessel stability was not evaluated for any load cases; it is incumbent upon the captain and crew to insure that adequate stability exists in all loading conditions to conduct operations safely using the following permissible tensions.
4. The calculations were performed assuming relative motions and accelerations as defined below. It is incumbent on the ship’s captain to determine whether operations should continue based on ship’s motions in a seaway.
5. Two primary load cases are analyzed: station keeping and towing.
a. Station keeping load cases assume that the vertical or side angles into the water may be up to 30 degrees from the vertical. These assumptions account for the combined effects of ship and overboard package relative motions.
b. Towing load cases assume a vertical angle of 45 degrees and side angles of 30 degrees to port or starboard.
6. Since the A-Frame capabilities are inextricably linked to its structural condition, the Owner of the vessel is responsible for maintaining the A-Frame to the manufacturer’s specification.
7. The A-Frame’s hydraulic cylinders are the only mechanisms for resisting reaction vector forward components. Extra care is required when operating with cable leads forward of vertical because of this resultant forward vector. Should hydraulics fail during operations of this type, the A-Frame will rotate forward outboard till it hits the hard stops.
8. Maximum permissible tensions are calculated assuming that there is only a single load on the A-Frame at one time and the cable lead from the winch does not cross the vessel centerline. Portable winch load cases are symmetric about the centerline although only one side is shown.
9. The portable deck winches are assumed to have a levelwind lead 11" above the aft Main Deck. This is conservative for stern A-Frame loading and the assigned load case MPT is applicable to levelwind leads higher off the deck for that winch position.
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 4 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
10. For intermediate deck winch positions, reference the load case winch position further aft of the position in question for the applicable MPT.
11. For all heavy operations such as towing or coring where the cable tension will approach the MPT of the Stern A-Frame, the A-Frame must be positioned at one of the two
outboard stop positions. Primary supported by the cylinders and a Secondary by bearing against the structural hard stop.
3.2. Reference Documents
3.2.1. 46 CFR§189.35 “Wet Weight Handling Gear.”
3.2.2. UNOLS Research Vessel Safety Standards (RVSS), Appendix A: “Rope and Cable Safe Working Load Standards,” University National Oceanographic Laboratory System (UNOLS), March 2009.
Systems Design Standards Criteria for the Design and Operations of Overboard Handling Systems,” University National Oceanographic Laboratory System (UNOLS), March 2009.
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 5 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
4. Summary Capabilities and Index
Maximum capabilities meet the following requirements:
Table 1 Maximum Permissible Line Tensions When A-Frame in Primary Outboard Position
All Load Cases
Port Flag Block with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Port Flag Block with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Starboard Flag Block with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Starboard Flag Block with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Forward of Fr. 94 with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Forward of Fr. 94 with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Aft of Fr. 94 with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Aft of Fr. 94 with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Worst Case Load with two leads to Wing pad eyes (P and S)
N/A N/A
See Figure 57, Figure 58, and Figure 59 in Section 5.1 of this document for Angle, A-Frame Padeye, and Outboard Position definitions respectively.
A-Frame Secondary Outboard Position capabilities are listed in Table 2.
For load case details, please refer to Table 3 to find the specific load case page.
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 6 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
Table 2 Maximum Permissible Line Tensions When A-Frame in Secondary Outboard Position
All Load Cases
Port Flag Block with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Port Flag Block with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Starboard Flag Block with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Starboard Flag Block with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Forward of Fr. 94 with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Forward of Fr. 94 with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Aft of Fr. 94 with Station Keeping Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Deck Winch Aft of Fr. 94 with Towing Load
30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf
Worst Case Load with two leads to Wing pad eyes (P and S)
N/A N/A
A-Frame speed rate for all positions ___ ________________________________________ 1.5-2 deg/sec Approximate time to deploy from Inboard/Outboard and back (Primary) _________________ 37-50 sec Approximate time to deploy from Inboard/Outboard and back (Secondary) _______________ 71-96 sec
DLT=120,000 lbs (Breaking strength of the wire rope for cross beam) DLTw=20,000 lbs ( Breaking strength of the wire rope for wings) MPT – Maximum line tension that results in the Safe Working Load of a component (UNOLS RVSS B.2.12).
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 7 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
Table 3 Index to Load Case Details
A-F
ram
e in
PRIM
AR
Y O
utbo
ard
Posit
ion
Port Flag Block with Station Keeping Load
Page 8 Page 10 Page 12
Port Flag Block with Towing Load
Page 9 Page 11 Page 13
Starboard Flag Block with Station Keeping Load
Page 14
Page 16
Page 18
Page 20
Starboard Flag Block with Towing Load
Page 15
Page 17
Page 19
Page 21
Deck Winch forward of Fr. 94 with Station Keeping Load
Page 22
Page 24
Page 26
Deck Winch forward of Fr. 94 with Towing Load
Page 23
Page 25
Page 27
Deck Winch aft of Fr. 94 with Station Keeping Load
Page 28
Page 30
Page 32
Page 34
Deck Winch aft of Fr. 94 with Towing Load
Page 29
Page 31
Page 33
Page 35
A-F
ram
e in
SEC
ON
DA
RY
Out
boar
d Po
sitio
n Port Flag Block with Station Keeping Load
Page 36
Page 38
Page 40
Port Flag Block with Towing Load
Page 37
Page 39
Page 41
Starboard Flag Block with Station Keeping Load
Page 42
Page 44
Page 46
Page 48
Starboard Flag Block with Towing Load
Page 43
Page 45
Page 47
Page 49
Deck Winch forward of Fr. 94 with Station Keeping Load
Page 50
Page 52
Page 54
Deck Winch forward of Fr. 94 with Towing Load
Page 51
Page 53
Page 55
Deck Winch aft of Fr. 94 with Station Keeping Load
Page 56
Page 58
Page 60
Page 62
Deck Winch aft of Fr. 94 with Towing Load
Page 57
Page 59
Page 61
Page 63
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 8 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on Centerline (CL) Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 SF to Yield Hydraulic capacity 30,000 lbf|
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 98° CL Padeye
Wrap Angle (W) 66° - 116° Port Flag Block
Figure 1
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 9 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Port Flag Block, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity | 30,000 lbf |
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 45° Towing
Lead-in Angle (A) 98° CL Padeye
Wrap Angle (W) 50° - 95° Port Flag Block
Figure 2
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 10 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 94° CP Padeye
Wrap Angle (W) 66° - 116° Port Flag Block
Figure 3
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 11 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Port Flag Block, Towing on CP Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 45° Towing
Lead-in Angle (A) 94° CP Padeye
Wrap Angle (W) 50° - 95° Port Flag Block
Figure 4
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 12 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf
DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 87° LP Padeye
Wrap Angle (W) 57° - 101° Port Flag Block
Figure 5
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 13 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Port Flag Block, Towing on LP Padeye
Maximum Permissible Tension (MPT) 20,000 lbf
DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 45° Towing
Lead-in Angle (A) 87° LP Padeye
Wrap Angle (W) 42° - 87° Port Flag Block
Figure 6
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 14 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 86° CL Padeye
Wrap Angle (W) 64° - 114° Starboard Flag Block
Figure 7
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 15 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 45° Towing
Lead-in Angle (A) 86° CL Padeye
Wrap Angle (W) 49° - 94° Starboard Flag Block
Figure 8
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 16 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 89° CS Padeye
Wrap Angle (W) 64° - 114° Starboard Flag Block
Figure 9
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 17 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on CS Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 89° Towing
Lead-in Angle (A) 60° - 120° CS Padeye
Wrap Angle (W) 49° - 94° Starboard Flag Block
Figure 10
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 18 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf
DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 94° FS Padeye
Wrap Angle (W) 67° - 114° Starboard Flag Block
Figure 11
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 19 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on FS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf
DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 45° Towing
Lead-in Angle (A) 94° FS Padeye
Wrap Angle (W) 59° - 97° Starboard Flag Block
Figure 12
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 20 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on (LS) Padeye.
Maximum Permissible Tension (MPT) 20,000 lbf
DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
Maximum Side Angle (S) 30° Station Keeping
Maximum Vertical Angle (V) 30° Station Keeping
Lead-in Angle (A) 95° LS Padeye
Wrap Angle (W) 58° - 101° Starboard Flag Block
Figure 13
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 21 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on LS Padeye
Maximum Permissible Tension (MPT) 20,000 lbf
DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf
Maximum Side Angle (S) 30° Towing
Maximum Vertical Angle (V) 45° Towing
Lead-in Angle (A) 95° LS Padeye
Wrap Angle (W) 43° - 88° Starboard Flag Block
Figure 14
R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev.C
Page 22 of 68 ASC Job No. 2339, Date of 11/11/15 77/15Issue
A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94 Station Keeping on CL Padeye
Maximum Permissible Tension (MPT) 30,000 lbf
DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf