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Motions of Catamarans in Oblique Seas at Speed

Citation

Thomas, GA and Davis, MR and Doctors, L and Couser, P and Holloway, DS and Lilienthal, T and Magnuson, TA, Motions of Catamarans in Oblique Seas at Speed , Royal Institution of Naval Architects. Transactions. Part A. International Journal of Maritime Engineering, 151, (Part a2) pp. 13-24. ISSN 1479-8751 (2009) [Refereed Article]


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Copyright Statement

Copyright RINA 2009

Official URL: http://www.rina.org.uk

Abstract

Motions, particularly roll, may have significant implications for passenger comfort when operating a catamaran in oblique seas. Designers of high-speed catamarans therefore need tools for predicting a vessel's seakeeping performance. This work presents three numerical methods for predicting vessel motions in oblique seas: a boundary-element method combined with a strip-theory approach modified for multihulls, a two-dimensional Green function time-domain strip-theory and a modified strip-theory method. Experiments to measure the motion response of a catamaran in oblique seas were conducted using an NPL 5b model at three speeds (Fn = 0.203, 0.406 and 0.508). The experiments showed that all motions tended to increase with increasing speed. Generally the boundary-element method and modified strip-theory method correctly predicted responses in all of the experimental configurations. The two-dimensional Green function time-domain strip-theory was used to predict the motions at the two higher speeds only and was also found, in general, to predict the motions satisfactorily.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Naval Architecture
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Engineering
Author:Thomas, GA (Professor Giles Thomas)
Author:Davis, MR (Professor Michael Davis)
Author:Holloway, DS (Dr Damien Holloway)
Author:Lilienthal, T (Mr Tim Lilienthal)
Author:Magnuson, TA (Mr Thomas Magnuson)
ID Code:58616
Year Published:2009
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2009-10-16
Last Modified:2011-11-25
Downloads:11 View Download Statistics

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