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Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures

Floating structures, such as Spar platform, are likely to experience significant motions while operation due to Vortex-induced Motion (VIM). The main features of VIM include aspect ratio and mass ratio of the structure. This paper focuses on further development of a previously published semi-empiric...

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Main Authors:	A. Rahman, Mohd. Asamudin, Wan Hussin, Wan Norazam, Mohd., Mohd. Hairil, Harun, Fatimah Noor, Lee, Kee Quen, Jeom, Kee Paik
Format:	Article
Published:	Taylor and Francis Ltd. 2019
Subjects:	T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/87679/ http://dx.doi.org/10.1080/17445302.2019.1593308
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id	my.utm.87679
record_format	eprints
spelling	my.utm.876792020-11-30T13:08:34Z http://eprints.utm.my/id/eprint/87679/ Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures A. Rahman, Mohd. Asamudin Wan Hussin, Wan Norazam Mohd., Mohd. Hairil Harun, Fatimah Noor Lee, Kee Quen Jeom, Kee Paik T Technology (General) Floating structures, such as Spar platform, are likely to experience significant motions while operation due to Vortex-induced Motion (VIM). The main features of VIM include aspect ratio and mass ratio of the structure. This paper focuses on further development of a previously published semi-empirical method called wake oscillator model (WOM) for VIM, which aims to derive a mathematical correlation in modelling all features of the phenomenon. Analytical solution is proposed to coupled WOM and structure oscillator model based on the Van der Pol equation by integrating mass ratio, m* = 4.36, and various low aspect ratios between 0.3 and 2.0. Additionally, a new approach was initiated to embed several empirical parameters linked to the aspect ratio in the existing WOM. It was found the aspect ratio parameter in the modified WOM significantly affected the performance of the model for estimation of VIM on floating structures. Taylor and Francis Ltd. 2019-10 Article PeerReviewed A. Rahman, Mohd. Asamudin and Wan Hussin, Wan Norazam and Mohd., Mohd. Hairil and Harun, Fatimah Noor and Lee, Kee Quen and Jeom, Kee Paik (2019) Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures. Ships and Offshore Structures, 14 (sup1). pp. 335-343. ISSN 1744-5302 http://dx.doi.org/10.1080/17445302.2019.1593308
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	T Technology (General)
spellingShingle	T Technology (General) A. Rahman, Mohd. Asamudin Wan Hussin, Wan Norazam Mohd., Mohd. Hairil Harun, Fatimah Noor Lee, Kee Quen Jeom, Kee Paik Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
description	Floating structures, such as Spar platform, are likely to experience significant motions while operation due to Vortex-induced Motion (VIM). The main features of VIM include aspect ratio and mass ratio of the structure. This paper focuses on further development of a previously published semi-empirical method called wake oscillator model (WOM) for VIM, which aims to derive a mathematical correlation in modelling all features of the phenomenon. Analytical solution is proposed to coupled WOM and structure oscillator model based on the Van der Pol equation by integrating mass ratio, m* = 4.36, and various low aspect ratios between 0.3 and 2.0. Additionally, a new approach was initiated to embed several empirical parameters linked to the aspect ratio in the existing WOM. It was found the aspect ratio parameter in the modified WOM significantly affected the performance of the model for estimation of VIM on floating structures.
format	Article
author	A. Rahman, Mohd. Asamudin Wan Hussin, Wan Norazam Mohd., Mohd. Hairil Harun, Fatimah Noor Lee, Kee Quen Jeom, Kee Paik
author_facet	A. Rahman, Mohd. Asamudin Wan Hussin, Wan Norazam Mohd., Mohd. Hairil Harun, Fatimah Noor Lee, Kee Quen Jeom, Kee Paik
author_sort	A. Rahman, Mohd. Asamudin
title	Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
title_short	Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
title_full	Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
title_fullStr	Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
title_full_unstemmed	Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
title_sort	modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures
publisher	Taylor and Francis Ltd.
publishDate	2019
url	http://eprints.utm.my/id/eprint/87679/ http://dx.doi.org/10.1080/17445302.2019.1593308
_version_	1685578972964847616
score	13.211869

Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures

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