Response based identification of critical wave scenarios
In the last years the identification and investigation of critical wave sequences regarding offshore structure responses became one of the main topics in the ocean engineering community. Thereby the area of interest covers the entire field of application spectra at sea - from efficient and economic...
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fttuhamburg:oai:tore.tuhh.de:11420/4472 2023-08-20T04:02:42+02:00 Response based identification of critical wave scenarios Clauss, Günther F. Klein, Marco Soares, Carlos Guedes Fonseca, Nuno 2012-12-01 http://hdl.handle.net/11420/4472 en eng Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 978-079184489-2 Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE (2): 547-557 (2012-12-01) http://hdl.handle.net/11420/4472 Conference Paper Other 2012 fttuhamburg 2023-07-28T09:22:19Z In the last years the identification and investigation of critical wave sequences regarding offshore structure responses became one of the main topics in the ocean engineering community. Thereby the area of interest covers the entire field of application spectra at sea - from efficient and economic offshore operations in moderate sea states to reliability as well as survival in extreme wave conditions. For most cases, the focus lies on limiting criteria for the design, such as maximum global loads, maximum relative motions between two or more vessels or maximum accelerations, at which the floating structure has to operate or to survive. These criteria are typically combined with a limiting characteristic sea state (Hs, Tp) or a rogue wave. For the investigation of offshore structures as well as the identification of critical wave sequences, different approaches are available - most of them are based on linear transfer functions as it is an efficient procedure for the fast holistic evaluation. But, for some cases the linear method approach implies uncertainties due to nonlinear response behavior, in particular in extreme wave conditions. This paper presents an approach to these challenges, a response based optimization tool for critical wave sequence detection. This tool, which has been successfully introduced for the evaluation of the applicability of a multi-body system based on the linear method approach, is adjusted to a nonlinear task - the vertical bending moment of a chemical tanker in extreme wave conditions. Therefore a nonlinear strip theory solver is introduced into the optimization routine to capture the nonlinear effects on the vertical bending moment due to steep waves acting on large bow flares. The goal of the procedure is to find a worst case wave sequence for a certain critical sea state. This includes intensive numerical investigation as well as model test validation. Copyright © 2012 by ASME. Conference Object Arctic TUHH Open Research (TORE - Technische Universität Hamburg) Volume 2: Structures, Safety and Reliability 547 557 |
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Open Polar |
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TUHH Open Research (TORE - Technische Universität Hamburg) |
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fttuhamburg |
language |
English |
description |
In the last years the identification and investigation of critical wave sequences regarding offshore structure responses became one of the main topics in the ocean engineering community. Thereby the area of interest covers the entire field of application spectra at sea - from efficient and economic offshore operations in moderate sea states to reliability as well as survival in extreme wave conditions. For most cases, the focus lies on limiting criteria for the design, such as maximum global loads, maximum relative motions between two or more vessels or maximum accelerations, at which the floating structure has to operate or to survive. These criteria are typically combined with a limiting characteristic sea state (Hs, Tp) or a rogue wave. For the investigation of offshore structures as well as the identification of critical wave sequences, different approaches are available - most of them are based on linear transfer functions as it is an efficient procedure for the fast holistic evaluation. But, for some cases the linear method approach implies uncertainties due to nonlinear response behavior, in particular in extreme wave conditions. This paper presents an approach to these challenges, a response based optimization tool for critical wave sequence detection. This tool, which has been successfully introduced for the evaluation of the applicability of a multi-body system based on the linear method approach, is adjusted to a nonlinear task - the vertical bending moment of a chemical tanker in extreme wave conditions. Therefore a nonlinear strip theory solver is introduced into the optimization routine to capture the nonlinear effects on the vertical bending moment due to steep waves acting on large bow flares. The goal of the procedure is to find a worst case wave sequence for a certain critical sea state. This includes intensive numerical investigation as well as model test validation. Copyright © 2012 by ASME. |
format |
Conference Object |
author |
Clauss, Günther F. Klein, Marco Soares, Carlos Guedes Fonseca, Nuno |
spellingShingle |
Clauss, Günther F. Klein, Marco Soares, Carlos Guedes Fonseca, Nuno Response based identification of critical wave scenarios |
author_facet |
Clauss, Günther F. Klein, Marco Soares, Carlos Guedes Fonseca, Nuno |
author_sort |
Clauss, Günther F. |
title |
Response based identification of critical wave scenarios |
title_short |
Response based identification of critical wave scenarios |
title_full |
Response based identification of critical wave scenarios |
title_fullStr |
Response based identification of critical wave scenarios |
title_full_unstemmed |
Response based identification of critical wave scenarios |
title_sort |
response based identification of critical wave scenarios |
publishDate |
2012 |
url |
http://hdl.handle.net/11420/4472 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 978-079184489-2 Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE (2): 547-557 (2012-12-01) http://hdl.handle.net/11420/4472 |
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Volume 2: Structures, Safety and Reliability |
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547 |
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557 |
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1774713310580572160 |