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Parametric study of seakeeping of a trimaran in regular oblique waves

Nowruzi, L ORCID: 0000-0002-4158-4300, Enshaei, H ORCID: 0000-0002-5649-7015, Lavroff, J ORCID: 0000-0001-5262-8666 and Davis, MR 2020 , 'Parametric study of seakeeping of a trimaran in regular oblique waves' , Ships and Offshore Structures , pp. 1-12 , doi: 10.1080/17445302.2020.1735809.

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Abstract

This paper presents the impact of different geometrical parameters on the seakeeping of a trimaran in regular oblique waves. Experimental tests for eight different arrangements of outriggers were conducted for a range of wave frequencies where a constant wave heading, and wave height was maintained. It was found that the position of outriggers and the hull shape have significant impacts on dynamic performance of the model. Roll motions reduce with an increase in longitudinal spacing of main and demi-hulls transoms, separation of outrigger centre lines and buoyancy fraction of outriggers, while heave motion and resistance are increased, and pitch motions are slightly influenced.It was concluded that positioning of outriggers can reduce the roll motions peak amplitude by 80%. This is due to the trimaran geometry and the effect of reflected waves between the hulls. In configurations with minimum roll motion, the added resistance peak is maximised when compared with other configurations.

Item Type: Article
Authors/Creators:Nowruzi, L and Enshaei, H and Lavroff, J and Davis, MR
Keywords: high-speed trimaran, outriggers arrangement, heave motions, pitch motions; roll motions, oblique seas, seakeeping, hydrodynamics
Journal or Publication Title: Ships and Offshore Structures
Publisher: Taylor & Francis
ISSN: 1744-5302
DOI / ID Number: 10.1080/17445302.2020.1735809
Copyright Information:

Copyright 2020 Informa UK Limited, trading as Taylor & Francis Group

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