Structural behaviour of fully coupled spar-mooring system under extreme wave loading

Floating spar platform has been proven to be an economical and efficient type of offshore oil and gas exploration structure in deep and ultra-deep seas. Associated nonlinearities, coupled action, damping effect and extreme sea environments may modify its structural responses. In this study, fully co...

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Main Authors: Saiful Islam, A.B.M., Jameel, M., Ahmad, S., Jumaat, M.Z., Kurian, V.J.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.32473 /
Published: 2013
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892142884&doi=10.3846%2f13923730.2013.801899&partnerID=40&md5=8bd45c0cc36d550b0556d9025ce87111
http://eprints.utp.edu.my/32473/
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spelling utp-eprints.324732022-03-29T14:03:45Z Structural behaviour of fully coupled spar-mooring system under extreme wave loading Saiful Islam, A.B.M. Jameel, M. Ahmad, S. Jumaat, M.Z. Kurian, V.J. Floating spar platform has been proven to be an economical and efficient type of offshore oil and gas exploration structure in deep and ultra-deep seas. Associated nonlinearities, coupled action, damping effect and extreme sea environments may modify its structural responses. In this study, fully coupled spar-mooring system is modelled integrating mooring lines with the cylindrical spar hull. Rigid beam element simulates large cylindrical spar hull and catenary mooring lines are configured by hybrid beam elements. Nonlinear finite element analysis is performed under extreme wave loading at severe deep sea. Morison's equation has been used to calculate the wave forces. Spar responses and mooring line tensions have been evaluated. Though the maximum mooring line tensions are larger at severe sea-state, it becomes regular after one hour of wave loading. The response time histories in surge, heave, pitch and the maximum mooring tension gradually decreases even after attaining steady state. It is because of damping due to heavier and longer mooring lines in coupled spar-mooring system under deep water conditions. The relatively lesser values of response time histories in surge, heave, pitch and the maximum mooring tension under extreme wave loading shows the suitability of a spar platform for deep water harsh and uncertain environmental conditions. © 2013 Copyright © 2013 Vilnius Gediminas Technical University (VGTU) Press. 2013 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892142884&doi=10.3846%2f13923730.2013.801899&partnerID=40&md5=8bd45c0cc36d550b0556d9025ce87111 Saiful Islam, A.B.M. and Jameel, M. and Ahmad, S. and Jumaat, M.Z. and Kurian, V.J. (2013) Structural behaviour of fully coupled spar-mooring system under extreme wave loading. Journal of Civil Engineering and Management, 19 (SUPPL.). S69-S77. http://eprints.utp.edu.my/32473/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Floating spar platform has been proven to be an economical and efficient type of offshore oil and gas exploration structure in deep and ultra-deep seas. Associated nonlinearities, coupled action, damping effect and extreme sea environments may modify its structural responses. In this study, fully coupled spar-mooring system is modelled integrating mooring lines with the cylindrical spar hull. Rigid beam element simulates large cylindrical spar hull and catenary mooring lines are configured by hybrid beam elements. Nonlinear finite element analysis is performed under extreme wave loading at severe deep sea. Morison's equation has been used to calculate the wave forces. Spar responses and mooring line tensions have been evaluated. Though the maximum mooring line tensions are larger at severe sea-state, it becomes regular after one hour of wave loading. The response time histories in surge, heave, pitch and the maximum mooring tension gradually decreases even after attaining steady state. It is because of damping due to heavier and longer mooring lines in coupled spar-mooring system under deep water conditions. The relatively lesser values of response time histories in surge, heave, pitch and the maximum mooring tension under extreme wave loading shows the suitability of a spar platform for deep water harsh and uncertain environmental conditions. © 2013 Copyright © 2013 Vilnius Gediminas Technical University (VGTU) Press.
format Article
author Saiful Islam, A.B.M.
Jameel, M.
Ahmad, S.
Jumaat, M.Z.
Kurian, V.J.
spellingShingle Saiful Islam, A.B.M.
Jameel, M.
Ahmad, S.
Jumaat, M.Z.
Kurian, V.J.
Structural behaviour of fully coupled spar-mooring system under extreme wave loading
author_sort Saiful Islam, A.B.M.
title Structural behaviour of fully coupled spar-mooring system under extreme wave loading
title_short Structural behaviour of fully coupled spar-mooring system under extreme wave loading
title_full Structural behaviour of fully coupled spar-mooring system under extreme wave loading
title_fullStr Structural behaviour of fully coupled spar-mooring system under extreme wave loading
title_full_unstemmed Structural behaviour of fully coupled spar-mooring system under extreme wave loading
title_sort structural behaviour of fully coupled spar-mooring system under extreme wave loading
publishDate 2013
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892142884&doi=10.3846%2f13923730.2013.801899&partnerID=40&md5=8bd45c0cc36d550b0556d9025ce87111
http://eprints.utp.edu.my/32473/
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score 11.62408

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