Wavelet analysis of loads on a flexible ship model traveling in large-amplitude waves


Du, Shuangxing, Hudson, Dominic A., Price, Geraint W., Temarel, Pandeli, Chen, Ruizhang and Wu, Yousheng (2008) Wavelet analysis of loads on a flexible ship model traveling in large-amplitude waves. Journal of Ship Research, 52, (4), 249-262.

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Description/Abstract

This study describes an application of a Daubechies wavelet function to analyze measured ship model data. The records of a self-propelled, flexible model of the S175 containership moving in waves are analyzed by fast Fourier transform (FFT) and wavelet methods. It is shown that the high-frequency component of the recorded rigid body motions can be omitted without substantially affecting the main features of the data set relating to dynamic loads. The decomposition of the bending moment time history into low- and high-frequency components allows the time of impact occurrence and its amplitude to be easily detected. Such quantities provide important information for the development of generic and realistic transient impact (e.g., slamming, green water) force models for ships traveling in waves.

Item Type: Article
ISSNs: 0022-4502 (print)
Related URLs:
Keywords: wavelet, flexible model, motions, wave loads
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
ePrint ID: 64740
Date Deposited: 13 Jan 2009
Last Modified: 14 Apr 2014 10:11
Contact Email Address: dominic@soton.ac.uk
URI: http://eprints.soton.ac.uk/id/eprint/64740

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