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The influence of the centre bow and wet-deck geometry on motions of wave-piercing catamarans

Citation

Shabani, B and Lavroff, J and Holloway, DS and Davis, MR and Thomas, GA, The influence of the centre bow and wet-deck geometry on motions of wave-piercing catamarans, Journal of Engineering for the Maritime Environment, 232, (2) pp. 474-487. ISSN 1475-0902 (2019) [Refereed Article]

Copyright Statement

Copyright 2018 IMechE

DOI: doi:10.1177/1475090217753761

Abstract

The effects of tunnel height and centre bow length on the motions of a 112-m wave-piercer catamaran with an above water centre bow were investigated through model tests. Five alternative centre bow configurations were considered, and multiple series of model tests were conducted in regular head sea waves. The results showed that both heave and pitch increased over a wide range of wave encounter frequency as the wet-deck height of the catamaran model increased. However, increasing the length of the centre bow showed an increase in the pitch but a decrease in the heave for a limited range of wave encounter frequency near the heave and pitch resonance frequencies of the catamaran model. The positions of minimum vertical displacement were found to be aft of the longitudinal centre of gravity, between 20% and 38% of the overall length from the transom. Increase in the wet-deck height and consequently the archway clearance between the main hulls and centre bow also resulted in an increase in the vertical displacement relative to the undisturbed water surface in the centre bow area. The results also indicated the vulnerability to wet-deck slamming for the different bow and wet-deck designs.

Item Details

Item Type:Refereed Article
Keywords:Maritime systems research/design/development, high speed catamarans, wave piercing catamarans; centre bow and wet deck geometry, motion response to regular waves, relative motion, slamming exposure.
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ship and Platform Hydrodynamics
Objective Division:Transport
Objective Group:Water Transport
Objective Field:Passenger Water Transport
UTAS Author:Shabani, B (Mr Babak Shabani)
UTAS Author:Lavroff, J (Dr Jason Lavroff)
UTAS Author:Holloway, DS (Dr Damien Holloway)
UTAS Author:Davis, MR (Professor Michael Davis)
ID Code:123959
Year Published:2019 (online first 2018)
Funding Support:Australian Research Council (LP0883540)
Web of Science® Times Cited:1
Deposited By:Engineering
Deposited On:2018-02-02
Last Modified:2019-10-08
Downloads:4 View Download Statistics

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