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Analysis of wave slam induced hull vibrations using continuous wavelet transforms

journal contribution
posted on 2023-05-17, 14:56 authored by Amin, W, Michael DavisMichael Davis, Giles ThomasGiles Thomas, Damien HollowayDamien Holloway
Large high-speed wave-piercing catamarans are subject to continuous wave induced hull vibrations during their lifetime of operation. In severe sea conditions, the vessel experiences high load impacts, known as slamming, accompanied by high frequency structural response giving rise to fatigue effects. Classical vibration analysis techniques such as the Fourier Transform fail to identify the exact response frequencies of slamming events due to the transformation to the frequency domain and the loss of temporal information about these transient events which is of great importance to fatigue analysis. The work presented in this paper introduces, describes, applies and recommends the continuous wavelet transform as an effective means to investigate the wave induced hull vibrations in both the time and frequency domains simultaneously.

History

Publication title

Ocean Engineering

Volume

58

Pagination

154-166

ISSN

0029-8018

Department/School

Australian Maritime College

Publisher

Pergamon-Elsevier Science Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1Gb

Rights statement

Copyright 2012 Elsevier Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Water transport not elsewhere classified