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Time-frequency analysis of transient dispersive waves: A comparative study |
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| Authors: | A. Apostoloudia L.J. Hadjileontiadis A. Trochidis |
| Affiliation: | a Physics Division, Faculty of Engineering, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece b Mechanics Division, Faculty of Engineering, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece c Division of Telecommunications, Department of Electrical and Computer Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece |
| Abstract: | 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. |
| Keywords: | Dispersive waves Flexural waves Wigner distribution Wavelets Hilbert Huang transform |
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