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Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions

From the beginning of recorded history, physical model testing has been regarded as the most reliable method to predict the dynamic responses of semi-submersible platform when subjected to environmental loadings. It is known that testing of floating structures requires very large model basins. As a...

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Main Author: Mohammed Salem Alqoushah, Sulaiman
Format: Final Year Project
Language:English
Published: IRC 2016
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://utpedia.utp.edu.my/18001/1/FINAL%20DISSERTATION%20-%20Sulaiman%20Mohammed%20Salem%20Alqoushah%20-%2016675%20-%20CVE.pdf
http://utpedia.utp.edu.my/18001/
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spelling my-utp-utpedia.180012018-08-01T09:51:31Z http://utpedia.utp.edu.my/18001/ Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions Mohammed Salem Alqoushah, Sulaiman TA Engineering (General). Civil engineering (General) From the beginning of recorded history, physical model testing has been regarded as the most reliable method to predict the dynamic responses of semi-submersible platform when subjected to environmental loadings. It is known that testing of floating structures requires very large model basins. As a matter of fact, physical model testing of deep water floaters is restricted due to the limitations of wave basins especially the water depth in the offshore testing facilities worldwide. Decades of research have focused on the methods to overcome the limitation of water depth in wave basin. However, little attention has been given to the scale effects on the responses of the physical model. The aim of this study was to conduct a comprehensive experimental study on the effects of various scale ratios on the prediction of dynamic motions of the semi-submersible platform in UTP offshore wave basin. The geometry of the semi-submersible prototype has been chosen with similar configuration to the ocean ranger that had sunk to the bottom of the ocean with the loss of all 84 of its crew. Froude’s model law of similitude has been used to scale down the prototype to the scale of 1:100 and 1:300. The time series responses for the six degrees of freedom (6DOF) and response energy spectra for physical model tests were compared in the prototype scale with the numerical simulation that had been done using STAR-CCM+ software. The results showed a good agreement between the model test 1:300 and the semi-submersible platform compared to the model 1:100. This could be due to the size of the model. As a matter of fact, the smaller the model the lesser affected by the reflected waves from the walls of the wave basin facility. The objectives of the study were achieved. IRC 2016-05 Final Year Project NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/18001/1/FINAL%20DISSERTATION%20-%20Sulaiman%20Mohammed%20Salem%20Alqoushah%20-%2016675%20-%20CVE.pdf Mohammed Salem Alqoushah, Sulaiman (2016) Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions. IRC, Universiti Teknologi PETRONAS.
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Mohammed Salem Alqoushah, Sulaiman
Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions
description From the beginning of recorded history, physical model testing has been regarded as the most reliable method to predict the dynamic responses of semi-submersible platform when subjected to environmental loadings. It is known that testing of floating structures requires very large model basins. As a matter of fact, physical model testing of deep water floaters is restricted due to the limitations of wave basins especially the water depth in the offshore testing facilities worldwide. Decades of research have focused on the methods to overcome the limitation of water depth in wave basin. However, little attention has been given to the scale effects on the responses of the physical model. The aim of this study was to conduct a comprehensive experimental study on the effects of various scale ratios on the prediction of dynamic motions of the semi-submersible platform in UTP offshore wave basin. The geometry of the semi-submersible prototype has been chosen with similar configuration to the ocean ranger that had sunk to the bottom of the ocean with the loss of all 84 of its crew. Froude’s model law of similitude has been used to scale down the prototype to the scale of 1:100 and 1:300. The time series responses for the six degrees of freedom (6DOF) and response energy spectra for physical model tests were compared in the prototype scale with the numerical simulation that had been done using STAR-CCM+ software. The results showed a good agreement between the model test 1:300 and the semi-submersible platform compared to the model 1:100. This could be due to the size of the model. As a matter of fact, the smaller the model the lesser affected by the reflected waves from the walls of the wave basin facility. The objectives of the study were achieved.
format Final Year Project
author Mohammed Salem Alqoushah, Sulaiman
author_facet Mohammed Salem Alqoushah, Sulaiman
author_sort Mohammed Salem Alqoushah, Sulaiman
title Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions
title_short Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions
title_full Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions
title_fullStr Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions
title_full_unstemmed Experimental Study on the Effects of Various Scale Ratios of Physical Models on the Prediction of the Semi-Submersible Platform Dynamic Motions
title_sort experimental study on the effects of various scale ratios of physical models on the prediction of the semi-submersible platform dynamic motions
publisher IRC
publishDate 2016
url http://utpedia.utp.edu.my/18001/1/FINAL%20DISSERTATION%20-%20Sulaiman%20Mohammed%20Salem%20Alqoushah%20-%2016675%20-%20CVE.pdf
http://utpedia.utp.edu.my/18001/
_version_ 1739832448284360704
score 13.211869

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