Experimental study of freak wave impacts on a tension-leg platform

Luo, Min; Koh, Chan Ghee; Lee, Wei Xian; Lin, Pengzhi; Reeve, Dominic

doi:10.1016/j.marstruc.2020.102821

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Experimental study of freak wave impacts on a tension-leg platform

Min Luo

, Chan Ghee Koh, Wei Xian Lee, Pengzhi Lin, Dominic Reeve

Marine Structures, Volume: 74, Start page: 102821

Swansea University Authors: Min Luo , Dominic Reeve

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DOI (Published version): 10.1016/j.marstruc.2020.102821

Abstract

This study investigates the freak wave impinging on a tension-leg platform through wave flume experiments. The freak waves are generated using the focused wave theory. By adjusting the wave focusing location, different incident wave scenarios at the structure location are produced. Simultaneous meas...

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Published in:	Marine Structures
ISSN:	0951-8339
Published:	Elsevier BV 2020
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa55114
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first_indexed	2020-09-03T09:58:39Z
last_indexed	2020-11-04T04:08:36Z
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spelling	2020-11-03T13:09:33.5024513 v2 55114 2020-09-03 Experimental study of freak wave impacts on a tension-leg platform 91e3463c73c6a9d1f5c025feebe4ad0f 0000-0002-6688-9127 Min Luo Min Luo true false 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 2020-09-03 GENG This study investigates the freak wave impinging on a tension-leg platform through wave flume experiments. The freak waves are generated using the focused wave theory. By adjusting the wave focusing location, different incident wave scenarios at the structure location are produced. Simultaneous measurements of wave shape evolutions upon impingement, wave impact pressures on the platform deck, platform motions and tether forces are carried out for synchronized analyses of the wave kinematics/dynamics and structural responses. The variation of these parameters with the incident wave profile is studied. It is found that although applying less intensive local impact pressures as compared to the highly-breaking freak wave, the slightly-breaking or non-breaking freak wave imposes the same level of adverse effect on the platform's global stability in terms of motions and tether forces. In addition, the high-crest freak wave causes violent motions of the floating platform, which are likely to induce snap loads of large amplitude and high occurrence frequency in tethers. The published results would provide useful benchmarks for validating numerical and analytical models. Journal Article Marine Structures 74 102821 Elsevier BV 0951-8339 Freak wave, Tension-leg platform, Wave impact, Platform motion, Tether force 1 11 2020 2020-11-01 10.1016/j.marstruc.2020.102821 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2020-11-03T13:09:33.5024513 2020-09-03T10:55:06.5845091 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Min Luo 0000-0002-6688-9127 1 Chan Ghee Koh 2 Wei Xian Lee 3 Pengzhi Lin 4 Dominic Reeve 0000-0003-1293-4743 5 55114__18111__b08d4b75ff154b08a2047ca0113fa9a0.pdf 55114.pdf 2020-09-03T16:08:50.9592599 Output 1618299 application/pdf Accepted Manuscript true 2021-08-28T00:00:00.0000000 ©2020 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng https://creativecommons.org/licenses/by-nc-nd/4.0/
title	Experimental study of freak wave impacts on a tension-leg platform
spellingShingle	Experimental study of freak wave impacts on a tension-leg platform Min Luo Dominic Reeve
title_short	Experimental study of freak wave impacts on a tension-leg platform
title_full	Experimental study of freak wave impacts on a tension-leg platform
title_fullStr	Experimental study of freak wave impacts on a tension-leg platform
title_full_unstemmed	Experimental study of freak wave impacts on a tension-leg platform
title_sort	Experimental study of freak wave impacts on a tension-leg platform
author_id_str_mv	91e3463c73c6a9d1f5c025feebe4ad0f 3e76fcc2bb3cde4ddee2c8edfd2f0082
author_id_fullname_str_mv	91e3463c73c6a9d1f5c025feebe4ad0f_*_Min Luo 3e76fcc2bb3cde4ddee2c8edfd2f0082_*_Dominic Reeve
author	Min Luo Dominic Reeve
author2	Min Luo Chan Ghee Koh Wei Xian Lee Pengzhi Lin Dominic Reeve
format	Journal article
container_title	Marine Structures
container_volume	74
container_start_page	102821
publishDate	2020
institution	Swansea University
issn	0951-8339
doi_str_mv	10.1016/j.marstruc.2020.102821
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str	1
active_str	0
description	This study investigates the freak wave impinging on a tension-leg platform through wave flume experiments. The freak waves are generated using the focused wave theory. By adjusting the wave focusing location, different incident wave scenarios at the structure location are produced. Simultaneous measurements of wave shape evolutions upon impingement, wave impact pressures on the platform deck, platform motions and tether forces are carried out for synchronized analyses of the wave kinematics/dynamics and structural responses. The variation of these parameters with the incident wave profile is studied. It is found that although applying less intensive local impact pressures as compared to the highly-breaking freak wave, the slightly-breaking or non-breaking freak wave imposes the same level of adverse effect on the platform's global stability in terms of motions and tether forces. In addition, the high-crest freak wave causes violent motions of the floating platform, which are likely to induce snap loads of large amplitude and high occurrence frequency in tethers. The published results would provide useful benchmarks for validating numerical and analytical models.
published_date	2020-11-01T04:09:06Z
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score	11.01753

Experimental study of freak wave impacts on a tension-leg platform

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