Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy

Coupled dynamic analyses of a deep-water Semi-submersible platform, in the South China Sea region, is carried out under postulated damage of the restraining system for both 10 and 100-years return period events. Under the combined action of wind, wave, and current loads, motion responses of Semi-sub...

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Main Authors: Chandrasekaran, S., Uddin, S.A., Wahab, M.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23713 /
Published: Korean Society of Steel Construction 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091732349&doi=10.1007%2fs13296-020-00420-7&partnerID=40&md5=138367b385e6667a5f2628a4850ac08e
http://eprints.utp.edu.my/23713/
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spelling utp-eprints.237132021-08-19T09:40:41Z Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy Chandrasekaran, S. Uddin, S.A. Wahab, M. Coupled dynamic analyses of a deep-water Semi-submersible platform, in the South China Sea region, is carried out under postulated damage of the restraining system for both 10 and 100-years return period events. Under the combined action of wind, wave, and current loads, motion responses of Semi-submersible at 1500 and 2000 m water depths are analyzed in time-domain. Dynamic tension variations in the mooring lines are investigated for a fatigue failure using the S�N curve approach. Inclusion of a submerged buoy in the mooring system resulted in a marginal increase of the response due to a reduction in the restoration force of the mooring lines; submerged buoy also resulted in additional damping. The results of numerical studies showed an increase in tension in the mooring lines, which are adjacent to the damaged ones, causing reduced fatigue life. With the inclusion of submerged buoy in the mooring system, there is a considerable decrease in tension variation in mooring lines, increasing fatigue life. Failure of a mooring line causes an increase in tension of the adjacent mooring line, but not valid under all circumstances. It is seen from the studies that despite the postulated failure induced in a mooring, the adjoining line remains unaffected due to a steady coupling motion of the platform. © 2020, Korean Society of Steel Construction. Korean Society of Steel Construction 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091732349&doi=10.1007%2fs13296-020-00420-7&partnerID=40&md5=138367b385e6667a5f2628a4850ac08e Chandrasekaran, S. and Uddin, S.A. and Wahab, M. (2021) Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy. International Journal of Steel Structures, 21 (1). pp. 118-131. http://eprints.utp.edu.my/23713/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Coupled dynamic analyses of a deep-water Semi-submersible platform, in the South China Sea region, is carried out under postulated damage of the restraining system for both 10 and 100-years return period events. Under the combined action of wind, wave, and current loads, motion responses of Semi-submersible at 1500 and 2000 m water depths are analyzed in time-domain. Dynamic tension variations in the mooring lines are investigated for a fatigue failure using the S�N curve approach. Inclusion of a submerged buoy in the mooring system resulted in a marginal increase of the response due to a reduction in the restoration force of the mooring lines; submerged buoy also resulted in additional damping. The results of numerical studies showed an increase in tension in the mooring lines, which are adjacent to the damaged ones, causing reduced fatigue life. With the inclusion of submerged buoy in the mooring system, there is a considerable decrease in tension variation in mooring lines, increasing fatigue life. Failure of a mooring line causes an increase in tension of the adjacent mooring line, but not valid under all circumstances. It is seen from the studies that despite the postulated failure induced in a mooring, the adjoining line remains unaffected due to a steady coupling motion of the platform. © 2020, Korean Society of Steel Construction.
format Article
author Chandrasekaran, S.
Uddin, S.A.
Wahab, M.
spellingShingle Chandrasekaran, S.
Uddin, S.A.
Wahab, M.
Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy
author_sort Chandrasekaran, S.
title Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy
title_short Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy
title_full Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy
title_fullStr Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy
title_full_unstemmed Dynamic Analysis of Semi-submersible Under the Postulated Failure of Restraining System with Buoy
title_sort dynamic analysis of semi-submersible under the postulated failure of restraining system with buoy
publisher Korean Society of Steel Construction
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091732349&doi=10.1007%2fs13296-020-00420-7&partnerID=40&md5=138367b385e6667a5f2628a4850ac08e
http://eprints.utp.edu.my/23713/
_version_ 1741196719886958592
score 11.62408

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