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Motions and loads for a trimaran travelling in regular waves

Motions and loads for a trimaran travelling in regular waves
Motions and loads for a trimaran travelling in regular waves
Comparisons are carried out between the wave-induced motions and loads of a trimaran travelling at various forward speeds in regular head waves obtained using three-dimensional fluid-structure interaction models, treating the vessel both as rigid and flexible body. For the rigid body analysis only, both pulsating and translating, pulsating source distributions over the mean wetted surface are used. The latter is more suitable for fast vessels, due to the speed dependent Green's function. Only pulsating source distribution is used for the hydroelasticity analysis. Differences are observed between heave and pitch motion RAOs predicted by these two methods, for low as well as relatively high forward speeds of operation, arising in the main from the interaction between main hull and outriggers and the pitch resonance. The concept of the trimaran requires estimation of longitudinal loads, such as vertical bending moment, as well as transverse loads, such as prying moment at the connection of the crossbeam to the main hull, in order to evaluate the dynamic response of the structure in waves. The predicted vertical bending and prying moments from the three analytical models show differences, especially at relatively high forward speeds.
167-176
Royal Institution of Naval Architects
Bingham, A.E.
32e6081e-e601-4dbd-93e7-cbbf25709fc4
Hampshire, J.K.
9d24d171-6c40-4352-aa8e-b73c4ef2f18a
Miao, S.H.
9700ffca-6422-4e03-b71e-d377dc752937
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Wilson, P. A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Wilson, P.A.
Hearn, G.E.
Bingham, A.E.
32e6081e-e601-4dbd-93e7-cbbf25709fc4
Hampshire, J.K.
9d24d171-6c40-4352-aa8e-b73c4ef2f18a
Miao, S.H.
9700ffca-6422-4e03-b71e-d377dc752937
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Wilson, P. A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Wilson, P.A.
Hearn, G.E.

Bingham, A.E., Hampshire, J.K., Miao, S.H. and Temarel, P. (2001) Motions and loads for a trimaran travelling in regular waves. Wilson, P. A., Wilson, P.A. and Hearn, G.E. (eds.) In Proceedings of 6th International Conference on Fast Sea Transportation (FAST2001). vol. 2, Royal Institution of Naval Architects. pp. 167-176 . (doi:10.3940/rina.ft.2007.).

Record type: Conference or Workshop Item (Paper)

Abstract

Comparisons are carried out between the wave-induced motions and loads of a trimaran travelling at various forward speeds in regular head waves obtained using three-dimensional fluid-structure interaction models, treating the vessel both as rigid and flexible body. For the rigid body analysis only, both pulsating and translating, pulsating source distributions over the mean wetted surface are used. The latter is more suitable for fast vessels, due to the speed dependent Green's function. Only pulsating source distribution is used for the hydroelasticity analysis. Differences are observed between heave and pitch motion RAOs predicted by these two methods, for low as well as relatively high forward speeds of operation, arising in the main from the interaction between main hull and outriggers and the pitch resonance. The concept of the trimaran requires estimation of longitudinal loads, such as vertical bending moment, as well as transverse loads, such as prying moment at the connection of the crossbeam to the main hull, in order to evaluate the dynamic response of the structure in waves. The predicted vertical bending and prying moments from the three analytical models show differences, especially at relatively high forward speeds.

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More information

Published date: 2001
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 21866
URI: https://eprints.soton.ac.uk/id/eprint/21866
PURE UUID: 54900161-a64c-4c06-8960-9cf05d9405fd
ORCID for P. Temarel: ORCID iD orcid.org/0000-0003-2921-1242
ORCID for P. A. Wilson: ORCID iD orcid.org/0000-0002-6939-682X

Catalogue record

Date deposited: 05 Jun 2006
Last modified: 14 Mar 2019 01:56

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Contributors

Author: A.E. Bingham
Author: J.K. Hampshire
Author: S.H. Miao
Author: P. Temarel ORCID iD
Editor: P. A. Wilson ORCID iD
Editor: P.A. Wilson
Editor: G.E. Hearn

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