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Keywords: fatigue
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Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A020, June 5–10, 2022
Paper No: OMAE2022-79151
.../startup conditions, those elbows are subjected to bending under internal pressure, which may cause either plastic collapse or fracture due to low-cycle fatigue. On the other hand, the response of externally pressurised thick-walled elbows used in subsea systems, has received much less attention. The main...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 8: Ocean Renewable Energy, V008T09A015, June 5–10, 2022
Paper No: OMAE2022-78352
... framework to aid in deciding the most sustainable end-of-life solution for offshore wind turbines. offshore wind turbine marine renewable energy wind turbine fatigue damage and life extension monopile scour fatigue Proceedings of the ASME 2022 41st International Conference on Ocean, Offshore...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 8: Ocean Renewable Energy, V008T09A028, June 5–10, 2022
Paper No: OMAE2022-79124
... of the structural and geometrical arrangement on the modal turbine behaviour. floating wind turbines structural mechanics fatigue modal analysis Proceedings of the ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering OMAE2022 June 5-10, 2022, Hamburg, Germany OMAE2022-79124...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 8: Ocean Renewable Energy, V008T09A002, June 5–10, 2022
Paper No: OMAE2022-79114
... realised and results between both methods have been compared. Finally, the fatigue life, in operational condition, has been evaluated with the recent fatigue methodology, based on a ply-by-ply approach, developed by Bureau Veritas. Several design optimisations including glass fibres plies have also been...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 1: Offshore Technology, V001T01A002, June 5–10, 2022
Paper No: OMAE2022-78395
... Abstract This paper presents a method of assessing fatigue life due to slamming on the structural components inside drillship moonpools with a recess. The effect of free surface deformation in the moonpool, the resulting slamming pressure on the moonpool’s bulkheads, and the resulting stresses...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A053, June 5–10, 2022
Paper No: OMAE2022-78650
... Abstract The effect of out-of-plane bending (OPB) on the fatigue life of moorings has been the focus of extensive study over the last 15 years. Classification societies now require it to be considered in mooring chain fatigue life calculations. A fatigue analysis of the mooring for a North Sea...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A051, June 5–10, 2022
Paper No: OMAE2022-78468
... Abstract Fatigue life calculation of slender marine structures, such as risers and mooring lines, usually requires a high computational cost. This cost comes from using finite element-based numerical models to predict the stress response of such structures under the action of many fatigue...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A033, June 5–10, 2022
Paper No: OMAE2022-78431
... Abstract Thermal cut edges can be found in most maritime structures, e.g. in window openings or hatch corners on ships. It is very common to treat free plate edges by grinding or sandblasting due to fatigue and coating requirements. The aim of this study is to review the fatigue behavior...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 7: CFD and FSI, V007T08A032, June 5–10, 2022
Paper No: OMAE2022-79509
... Abstract For an installed submarine power cable, fatigue is one of the main causes of failure. For static power cables there are cases such as free spans, spans between touch-down point (TDP) and J/I-Tube bell mouth and repair/sea joint procedures that may lead to failure due to fatigue...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A032, June 5–10, 2022
Paper No: OMAE2022-79084
... tension and concern over fatigue performance. This paper aims to search for the global optimal solution of a riser system through the application of genetic algorithm (GA) and finite element analysis. The process method will, in turn, automate the design process, with the implementation of an optimisation...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T03A010, June 5–10, 2022
Paper No: OMAE2022-78556
... Abstract Large bolts are used in applications which are subjected to fatigue loads, such as the M72 bolts used in ring flanges of wind turbine towers. Pretension is used as a means of protecting bolts against fatigue loading. Design standards require particular levels of pretension...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A029, June 5–10, 2022
Paper No: OMAE2022-78590
... in the analyses; various cases with different riser design margins are investigated. steel lazy wave riser (SLWR) fatigue flowline steel catenary riser (SCR) flowline walking Proceedings of the ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering OMAE2022 June 5-10, 2022...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A039, June 5–10, 2022
Paper No: OMAE2022-81441
... Abstract DNV is currently running a Joint Industry Project, “NorMoor JIP”, which is now approaching the end of phase 3. In this phase the fatigue limit state (FLS) of mooring line studless chains for permanent units has got the main attention. Phases 1 and 2 covered the ultimate (ULS...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A038, June 5–10, 2022
Paper No: OMAE2022-81275
... to regular tank inspections intervals as an LNG carrier. The challenge is how to assess this equivalence. A definition of the reference vessel and trade is required. This paper addresses a new proposed methodology to quantify the relative pump tower fatigue. It is built up of several steps...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A038, June 5–10, 2022
Paper No: OMAE2022-81380
... load value (ΔMo) determined by water depth and operational mode. Finally, to outline quantified advice on maximum and cyclic load reduction potential that can be extracted from the underlying studies. NORSOK wellheads templates drilling loads fatigue Proceedings of the ASME 2022 41st...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T03A012, June 5–10, 2022
Paper No: OMAE2022-79102
... Abstract Steel wire ropes can be used as mooring lines for Floating Offshore Wind Turbines. Swell induces tension and bending in the line. Investigating the effects of combined loads on rope lifetime is necessary. In these cases, fretting-fatigue damage is considered to be one of the main...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A037, June 5–10, 2022
Paper No: OMAE2022-80511
... system to achieve optimum performance. Associated safety risks may be high and one of the damage modes of concern is structural fatigue. Fatigue accumulation may be driven by ship motions and wind gusts. The paper describes the process of how a pragmatic design formula has been derived to find a gust...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A030, June 5–10, 2022
Paper No: OMAE2022-78905
... Abstract It is very-well known that fatigue is a primary driver and challenge for steel catenary risers (SCRs) and potentially for steel lazy wave risers (SLWRs) as well. This challenge can be overcome in several ways, some better than others. However, the first step is to predict the fatigue...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 8: CFD and FSI, V008T08A017, June 21–30, 2021
Paper No: OMAE2021-63918
... screening based on widely used industry guidelines indicates a susceptibility to FIV fatigue failure for the steel piping in the TCP jumper assembly. A comprehensive screening based on structural finite element analysis and computational fluid dynamics shows that the vibration levels and stress cycling due...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 8: CFD and FSI, V008T08A018, June 21–30, 2021
Paper No: OMAE2021-64060
... for the direct estimation of vibration levels, stress, or fatigue damage. The third-tier assessment is termed a comprehensive screening and relies on computational fluid dynamics (CFD) to predict the flow-induced forcing, coupled to a structural finite element model to obtain the response of the piping...