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