Time Frequency Analysis of Dispersive Waves by Means of Wavelet Transform-Reference-Cited by-同舟云学术

Time Frequency Analysis of Dispersive Waves by Means of Wavelet Transform

Published:1995-12-01 Issue:4 Volume:62 Page:841-846
ISSN:0021-8936
Container-title:Journal of Applied Mechanics
language:en
Short-container-title:

Author:

Kishimoto Kikuo¹,Inoue Hirotsugu¹,Hamada Makoto¹,Shibuya Toshikazu¹

Affiliation:

1. Department of Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152, Japan

Abstract

A new approach is presented for investigating the dispersive character of structural waves. The wavelet transform is applied to the time-frequency analysis of dispersive waves. The flexural wave induced in a beam by lateral impact is considered. It is shown that the wavelet transform using the Gabor wavelet effectively decomposes the strain response into its time-frequency components. In addition, the peaks of the time-frequency distribution indicate the arrival times of waves. By utilizing this fact, the dispersion relation of the group velocity can be accurately identified for a wide range of frequencies.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics

Link

http://asmedigitalcollection.asme.org/appliedmechanics/article-pdf/62/4/841/5463943/841_1.pdf

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