eCite Digital Repository

Motions of Catamarans in Oblique Seas at Speed


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]

Restricted - Request a copy

Copyright Statement

Copyright RINA 2009

Official URL:

DOI: doi:10.3940/rina.ijme.2009.a1.150


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
UTAS Author:Thomas, GA (Professor Giles Thomas)
UTAS Author:Davis, MR (Professor Michael Davis)
UTAS Author:Holloway, DS (Associate Professor Damien Holloway)
UTAS Author:Lilienthal, T (Mr Tim Lilienthal)
UTAS 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

Repository Staff Only: item control page