Stern A-Frame and Foundation - R/V Sikuliaq · padeye MPTs, as line tension held ... The calculations were performed assuming relative motions and accelerations as defined ... Stern

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)



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



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.



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.

3.2.3. UNOLS Research Vessel Safety Standards (RVSS), Appendix B: “Overboard Handling

Systems Design Standards Criteria for the Design and Operations of Overboard Handling Systems,” University National Oceanographic Laboratory System (UNOLS), March 2009.

3.2.4. R/V Sikuliaq A-Frame Replacement Concept, The Glosten Associates, Inc., Drawing No.

185-SK-01, March 2014.



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.



Table 2 Maximum Permissible Line Tensions When A-Frame in Secondary Outboard Position

All Load Cases


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


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).



Table 3 Index to Load Case Details

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Posit

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Page 8 Page 10 Page 12


Page 9 Page 11 Page 13


Page 14

Page 16

Page 18

Page 20


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

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SEC

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boar

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n Port Flag Block with Station Keeping Load

Page 36

Page 38

Page 40


Page 37

Page 39

Page 41


Page 42

Page 44

Page 46

Page 48


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



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



A-Frame in Primary Outboard Position, Port Flag Block, Towing on CL Padeye


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



Figure 2



A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on CP Padeye


DLT Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf



Lead-in Angle (A) 94° CP Padeye


Figure 3



A-Frame in Primary Outboard Position, Port Flag Block, Towing on CP Padeye







Figure 4



A-Frame in Primary Outboard Position, Port Flag Block, Station Keeping on LP Padeye


DLTw Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 20,000 lbf



Lead-in Angle (A) 87° LP Padeye


Figure 5



A-Frame in Primary Outboard Position, Port Flag Block, Towing on LP Padeye







Figure 6



A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on CL Padeye






Wrap Angle (W) 64° - 114° Starboard Flag Block

Figure 7



A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on CL Padeye







Figure 8



A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on CS Padeye





Lead-in Angle (A) 89° CS Padeye


Figure 9



A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on CS Padeye


Factor of Safety (FS) 1.5 FS to Yield Hydraulic capacity 30,000 lbf



Lead-in Angle (A) 60° - 120° CS Padeye


Figure 10



A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on FS Padeye





Lead-in Angle (A) 94° FS Padeye


Figure 11



A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on FS Padeye







Figure 12



A-Frame in Primary Outboard Position, Starboard Flag Block, Station Keeping on (LS) Padeye.





Lead-in Angle (A) 95° LS Padeye


Figure 13



A-Frame in Primary Outboard Position, Starboard Flag Block, Towing on LS Padeye







Figure 14



A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94 Station Keeping on CL Padeye





Lead-in Angle (A) 90° - 106° CL Padeye

Wrap Angle (W) 81° - 131° Portable Winch Forward of Frame 94

Figure 15



A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Towing on CL Padeye






Wrap Angle (W) 66° - 111° Potable Winch Forward of Frame 94

Figure 16



A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on CP/CS Padeye





Lead-in Angle (A) 85° - 102° CP/CS Padeye

Wrap Angle (W) 81° - 131° Potable Winch Forward of Frame 94

Figure 17



A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Towing on CP/CS Padeye





Lead-in Angle (A) 85° - 102° CP/CS Padeye


Figure 18



A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on LP/LS Padeye





Lead-in Angle (A) 75° - 93° LP/LS Padeye


Figure 19



A-Frame in Primary Outboard Position, Portable Winch Forward of Frame 94, Towing on LP/LS Padeye





Lead-in Angle (A) 75° - 93° LP/LS Padeye


Figure 20



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94 Station Keeping on CL Padeye






Wrap Angle (W) 92° - 142° Portable Winch Aft of Frame 94

Figure 21



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on CL Padeye







Figure 22



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on CS/CP Padeye





Lead-in Angle (A) 71°- 98° CS/CP Padeye


Figure 23



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on CS/CP Padeye







Figure 24



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on (FS) Padeye





Lead-in Angle (A) 86°- 111° FS/FP Padeye


Figure 25



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on (FS) Padeye







Figure 26



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on LS/LP Padeye





Lead-in Angle (A) 86°- 115° LS/LP Padeye


Figure 27



A-Frame in Primary Outboard Position, Portable Winch Aft of Frame 94, Towing on LS/LP Padeye







Figure 28



A-Frame in Secondary Outboard Position, Port Flag Block Station Keeping on CL Padeye







Figure 29



A-Frame in Secondary Outboard Position, Port Flag Block, Towing on CL Padeye







Figure 30



A-Frame in Secondary Outboard Position, Port Flag Block, Station Keeping on CP Padeye







Figure 31



A-Frame in Secondary Outboard Position, Port Flag Block, Towing on CP Padeye







Figure 32



A-Frame in Secondary Outboard Position, Port Flag Block, Station Keeping on LP Padeye







Figure 33



A-Frame in Secondary Outboard Position, Port Flag Block, Towing on LP Padeye







Figure 34



A-Frame in Secondary Outboard Position, Starboard Flag Block Station Keeping on CL Padeye







Figure 35



A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on CL Padeye







Figure 36



A-Frame in Secondary Outboard Position, Starboard Flag Block, Station Keeping on CS Padeye







Figure 37



A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on CS Padeye







Figure 38



A-Frame in Secondary Outboard Position, Starboard Flag Block, Station Keeping on FS Padeye







Figure 39



A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on FS Padeye







Figure 40



A-Frame in Secondary Outboard Position, Starboard Flag Block, Station Keeping on LS Padeye







Figure 41



A-Frame in Secondary Outboard Position, Starboard Flag Block, Towing on LS Padeye







Figure 42



A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94 Station Keeping on CL Padeye





Lead-in Angle (A) 90°- 102° CL Padeye


Figure 43



A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Towing on CL Padeye







Figure 44



A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on CP/CS Padeye





Lead-in Angle (A) 89°- 99° CP/CS Padeye


Figure 45



A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Towing on CP/CS Padeye





Lead-in Angle (A) 89°- 99° CP/CS Padeye


Figure 46



A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Station Keeping on LP/LS Padeye





Lead-in Angle (A) 77°- 92° LP/LS Padeye


Figure 47



A-Frame in Secondary Outboard Position, Portable Winch Forward of Frame 94, Towing on LP/LS Padeye





Lead-in Angle (A) 77°- 92° LP/LS Padeye


Figure 48



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94 Station Keeping on CL Padeye







This position might not be applicable due to interference with the A-Frame foot base!

Figure 49



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on CL Padeye








Figure 50



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on CS/CP Padeye








Figure 51



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on CS/CP Padeye








Figure 52



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on FS Padeye







Figure 53



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on FS Padeye







Figure 54



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Station Keeping on LS/LP Padeye







Figure 55



A-Frame in Secondary Outboard Position, Portable Winch Aft of Frame 94, Towing on LS/LP Padeye







Figure 56



5. Operational Figures

5.1. Load Geometry

Figure 57: Geometry Angle Definitions



Figure 58: A-Frame Stopped Position reference

Figure 59: A-Frame Padeye reference



5.2. A-Frame Image



Figure 68: A-Frame Picture

R/V Sikuliaq MCD – Stern A-Frame and Foundation, Rev. C


R/V SIKULIAQ

Maximum Capability Document Summary: A-Frame and Foundation Manufactured By: Allied Systems Co.

Reference Drawing Number: #76033

Prepared By: I.V. Kormishkin Maximum Permissible Tensions (MPTs)

A-F

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PRIM

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n Port Flag Block with Station Keeping Load

30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf

A-F

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SEC

ON

DA

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utbo

ard

Posit

ion Port Flag Block with

Station Keeping Load 30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf


30,000 lbf 30,000 lbf 20,000 lbf 20,000 lbf

This summary is provided for reference. It is the operator’s responsibility to understand

the limits and assumptions as presented in the full Maximum Capability Document.