A numerical analysis of the response and air gap demand for semi-submersibles
This paper examines the effects of viscous damping on the prediction of air gap demand for semi-submersibles. This is illustrated by a case study of a typical six-column, double pontoon semi-submersible in irregular waves. Linear responses of the platform and free-surface elevations at selected loca...
Published in: | Volume 6: Materials Technology; C.C. Mei Symposium on Wave Mechanics and Hydrodynamics; Offshore Measurement and Data Interpretation |
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Main Authors: | , , , , , , , |
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Language: | English |
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2009
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Online Access: | https://vbn.aau.dk/da/publications/55215ebb-9496-4ad1-8ac0-005863246673 https://doi.org/10.1115/OMAE2009-79163 http://www.scopus.com/inward/record.url?scp=77953108377&partnerID=8YFLogxK |
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ftalborgunivpubl:oai:pure.atira.dk:publications/55215ebb-9496-4ad1-8ac0-005863246673 2023-05-15T14:23:45+02:00 A numerical analysis of the response and air gap demand for semi-submersibles Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin 2009-12-01 https://vbn.aau.dk/da/publications/55215ebb-9496-4ad1-8ac0-005863246673 https://doi.org/10.1115/OMAE2009-79163 http://www.scopus.com/inward/record.url?scp=77953108377&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Kurniawan , A , Huang , Z , Li , J , Liu , C , Wang , X , Hao , Z , Tan , S K & Nah , E 2009 , A numerical analysis of the response and air gap demand for semi-submersibles . in Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering 2009, OMAE2009 . vol. 6 , pp. 355-363 , 28th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2009 , Honolulu, HI , United States , 31/05/2009 . https://doi.org/10.1115/OMAE2009-79163 contributionToPeriodical 2009 ftalborgunivpubl https://doi.org/10.1115/OMAE2009-79163 2023-01-12T22:45:46Z This paper examines the effects of viscous damping on the prediction of air gap demand for semi-submersibles. This is illustrated by a case study of a typical six-column, double pontoon semi-submersible in irregular waves. Linear responses of the platform and free-surface elevations at selected locations are computed using WAMIT, in which viscous damping effects are included through the use of a linear damping matrix. The spectra of the platform's response and of the relative free-surface elevation at the selected locations, as well as the probability distributions of air gap minima obtained using different damping matrices are compared. It is demonstrated that correct modelling of viscous damping is important for an accurate prediction of air gap demand of a floating platform, especially if the peak frequency of the wave spectrum is close to the heave, roll, and pitch natural frequencies of the platform. Other Non-Article Part of Journal/Newspaper Arctic Aalborg University's Research Portal Volume 6: Materials Technology; C.C. Mei Symposium on Wave Mechanics and Hydrodynamics; Offshore Measurement and Data Interpretation 355 363 |
institution |
Open Polar |
collection |
Aalborg University's Research Portal |
op_collection_id |
ftalborgunivpubl |
language |
English |
description |
This paper examines the effects of viscous damping on the prediction of air gap demand for semi-submersibles. This is illustrated by a case study of a typical six-column, double pontoon semi-submersible in irregular waves. Linear responses of the platform and free-surface elevations at selected locations are computed using WAMIT, in which viscous damping effects are included through the use of a linear damping matrix. The spectra of the platform's response and of the relative free-surface elevation at the selected locations, as well as the probability distributions of air gap minima obtained using different damping matrices are compared. It is demonstrated that correct modelling of viscous damping is important for an accurate prediction of air gap demand of a floating platform, especially if the peak frequency of the wave spectrum is close to the heave, roll, and pitch natural frequencies of the platform. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin |
spellingShingle |
Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin A numerical analysis of the response and air gap demand for semi-submersibles |
author_facet |
Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin |
author_sort |
Kurniawan, Adi |
title |
A numerical analysis of the response and air gap demand for semi-submersibles |
title_short |
A numerical analysis of the response and air gap demand for semi-submersibles |
title_full |
A numerical analysis of the response and air gap demand for semi-submersibles |
title_fullStr |
A numerical analysis of the response and air gap demand for semi-submersibles |
title_full_unstemmed |
A numerical analysis of the response and air gap demand for semi-submersibles |
title_sort |
numerical analysis of the response and air gap demand for semi-submersibles |
publishDate |
2009 |
url |
https://vbn.aau.dk/da/publications/55215ebb-9496-4ad1-8ac0-005863246673 https://doi.org/10.1115/OMAE2009-79163 http://www.scopus.com/inward/record.url?scp=77953108377&partnerID=8YFLogxK |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Kurniawan , A , Huang , Z , Li , J , Liu , C , Wang , X , Hao , Z , Tan , S K & Nah , E 2009 , A numerical analysis of the response and air gap demand for semi-submersibles . in Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering 2009, OMAE2009 . vol. 6 , pp. 355-363 , 28th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2009 , Honolulu, HI , United States , 31/05/2009 . https://doi.org/10.1115/OMAE2009-79163 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1115/OMAE2009-79163 |
container_title |
Volume 6: Materials Technology; C.C. Mei Symposium on Wave Mechanics and Hydrodynamics; Offshore Measurement and Data Interpretation |
container_start_page |
355 |
op_container_end_page |
363 |
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1766296251122319360 |