Wavelet analysis of the extreme wave load test of a flexible ship model
نویسنده
چکیده
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 container ship moving in waves are analyzed by 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 travelling in waves.
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