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Second Order Motion Responses of Semi-submersibles: Numerical and Experimental Study

Kurian, V.J. and Yassir, M.E.A. and Harahap, I.S.H. (2011) Second Order Motion Responses of Semi-submersibles: Numerical and Experimental Study. In: ISOPE 2011 , 19th to 25th June 2011, Maui, Hawaii, USA.

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Abstract

In this study, numerical and experimental assessment of the 2nd order responses of a twin hulled semi-submersible subjected to monochromatic, bi-chromatic and random seas has been attempted. For numerical analysis, the 2nd order wave forces resulting from the 2nd order temporal acceleration and the structural 1st order motions have been obtained. The latter has been estimated by an iterative frequency domain analysis. Experimentally, the semi-submersible was modeled to a scale of 1:100 using Froude's scaling law principles. The measured drift force has been compared with available formulae in the literature and reported. The numerical results have shown good agreement with the experimental results. KEYWORDS: Second order drift forces; Low frequency motion responses; Nonlinear dynamic analysis; Frequency domain analysis; Semi-submersible model; Time domain analysis; Wave basin testing.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TA Engineering (General). Civil engineering (General)
Departments / MOR / COE:Research Institutes > Deep Water Technology
ID Code:6175
Deposited By: Prof Dr Kurian V John
Deposited On:07 Jul 2011 06:55
Last Modified:19 Jan 2017 08:22

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