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Boundary element methods in the prediction of the acoustic damping of ship whipping vibrations

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Holloway, DS and Thomas, GA and Davis, MR (2004) Boundary element methods in the prediction of the acoustic damping of ship whipping vibrations. Australian and New Zealand Industrial and Applied Mathematics Journal, 45 (E). pp. 845-856. ISSN 1446-8735

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Abstract

Damping of ship whipping vibrations following a slam due to wave impact is traditionally assumed to be primarily of material or structural origin. However, several mechanisms of energy dissipation to the surrounding water exist, including gravity and acoustic waves. Neither transports much energy for the lowest frequency modes, in which the acoustic wavelength may be an order or magnitude greater than the ship length whereas the gravity wavelength is at least an order of magnitude shorter than the ship beam. However, the acoustic damping ratio increases as the fourth power of frequency, becoming significant for higher frequency modes.

Item Type: Article
Journal or Publication Title: Australian and New Zealand Industrial and Applied Mathematics Journal
Page Range: pp. 845-856
ISSN: 1446-8735
Date Deposited: 16 Nov 2007 01:21
Last Modified: 18 Nov 2014 03:25
URI: http://eprints.utas.edu.au/id/eprint/2485
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