A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves

The effect of the short-crested waves on the motions of moored semi-submersible platform is demonstrated from the results of the model tests and has been compared with the theoretical calculations to validate the numerical simulations. The model tests were performed in the wave tank located in the O...

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Main Authors: Kurian, V.J., Ng, C.Y., Liew, M.S.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.31413 /
Published: Krishtel eMaging Solutions Pvt. Ltd 2015
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953854181&partnerID=40&md5=2d79bd26f7793de435ce7e8f05a7d193
http://eprints.utp.edu.my/31413/
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spelling utp-eprints.314132022-03-26T03:19:08Z A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves Kurian, V.J. Ng, C.Y. Liew, M.S. The effect of the short-crested waves on the motions of moored semi-submersible platform is demonstrated from the results of the model tests and has been compared with the theoretical calculations to validate the numerical simulations. The model tests were performed in the wave tank located in the Offshore Laboratory of UniversitiTeknologi PETRONAS. In the tests, the model was moored in the head sea with four linear springs fore and aft, and the motion responses subjected to multi-directional waves were measured. The responses in three degrees of freedom (DOF) (surge, heave and pitch) are presented. Two time domain numerical MATLAB codes incorporated with the long-crested wave and short-crested wave effect were developed. In the code, the mass, and stiffness matrices were calculated for each time step. The diffraction effect of long-crested and short-crested waveson circular cylinder was considered, and the equation of motion was solved by the Newmark Beta method. Responses in term of Response Amplitude Operator (RAO) are presented and compared. Good agreement between numerical and experimental results was achieved. The validated short-crested wave results were compared with the long-crested wave results. It was observed that the short-crested waves gave smaller responses in all DOF compared to the long-crested waves. Krishtel eMaging Solutions Pvt. Ltd 2015 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953854181&partnerID=40&md5=2d79bd26f7793de435ce7e8f05a7d193 Kurian, V.J. and Ng, C.Y. and Liew, M.S. (2015) A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves. Journal of Vibration Engineering and Technologies, 3 (3). pp. 331-344. http://eprints.utp.edu.my/31413/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The effect of the short-crested waves on the motions of moored semi-submersible platform is demonstrated from the results of the model tests and has been compared with the theoretical calculations to validate the numerical simulations. The model tests were performed in the wave tank located in the Offshore Laboratory of UniversitiTeknologi PETRONAS. In the tests, the model was moored in the head sea with four linear springs fore and aft, and the motion responses subjected to multi-directional waves were measured. The responses in three degrees of freedom (DOF) (surge, heave and pitch) are presented. Two time domain numerical MATLAB codes incorporated with the long-crested wave and short-crested wave effect were developed. In the code, the mass, and stiffness matrices were calculated for each time step. The diffraction effect of long-crested and short-crested waveson circular cylinder was considered, and the equation of motion was solved by the Newmark Beta method. Responses in term of Response Amplitude Operator (RAO) are presented and compared. Good agreement between numerical and experimental results was achieved. The validated short-crested wave results were compared with the long-crested wave results. It was observed that the short-crested waves gave smaller responses in all DOF compared to the long-crested waves.
format Article
author Kurian, V.J.
Ng, C.Y.
Liew, M.S.
spellingShingle Kurian, V.J.
Ng, C.Y.
Liew, M.S.
A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
author_sort Kurian, V.J.
title A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
title_short A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
title_full A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
title_fullStr A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
title_full_unstemmed A numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
title_sort numerical and experimental study on motion responses of semi-submersible platforms subjected to short-crested waves
publisher Krishtel eMaging Solutions Pvt. Ltd
publishDate 2015
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953854181&partnerID=40&md5=2d79bd26f7793de435ce7e8f05a7d193
http://eprints.utp.edu.my/31413/
_version_ 1741197569566965760
score 11.62408

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