Wavelet analysis of loads on a flexible ship model traveling in large-amplitude waves
Wavelet analysis of loads on a flexible ship model traveling in large-amplitude waves
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.
wavelet, flexible model, motions, wave loads
249-262
Du, Shuangxing
b3d92096-e05a-4f28-b054-1e412fba043a
Hudson, Dominic A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Price, Geraint W.
b7888f47-e3fc-46f4-9fb9-7839052ff17c
Temarel, Pandeli
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Chen, Ruizhang
d3bc1869-ba09-4554-adab-5068bcd30649
Wu, Yousheng
5c2dcbea-ed08-4bbc-84db-d9e2fd9879d5
December 2008
Du, Shuangxing
b3d92096-e05a-4f28-b054-1e412fba043a
Hudson, Dominic A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Price, Geraint W.
b7888f47-e3fc-46f4-9fb9-7839052ff17c
Temarel, Pandeli
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Chen, Ruizhang
d3bc1869-ba09-4554-adab-5068bcd30649
Wu, Yousheng
5c2dcbea-ed08-4bbc-84db-d9e2fd9879d5
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), .
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.
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Published date: December 2008
Keywords:
wavelet, flexible model, motions, wave loads
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 64740
URI: http://eprints.soton.ac.uk/id/eprint/64740
ISSN: 0022-4502
PURE UUID: c3545b5f-f682-4b68-a39a-8fa6c4dfc0b9
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Date deposited: 13 Jan 2009
Last modified: 16 Mar 2024 02:48
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Contributors
Author:
Shuangxing Du
Author:
Ruizhang Chen
Author:
Yousheng Wu
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