Journal
APPLIED ACOUSTICS
Volume 68, Issue 3, Pages 296-309Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2006.02.002
Keywords
dispersive waves; flexural waves; Wigner distribution; wavelets; Hilbert Huang transform
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The goal in this work is to investigate the effectiveness of time-frequency representations for analysing dispersive waves by comparing the performance of three different methods. In particular, the smoothed pseudo-Wigner distribution, the continuous wavelet transform and the Hilbert-Huang transform are compared and evaluated in terms of their ability to analyse dispersive elastic waves. The waves under consideration are transient flexural ones generated by an impact in a beam. In view of the results of the comparative study, the advantages and shortcomings of each method are presented and discussed. (c) 2006 Published by Elsevier Ltd.
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