Propagation Characteristic of Ultrasonic Lamb Wave

Abstract:

Ultrasonic wave transmitted in the plate is called Lamb wave. The dispersion characteristic of Lamb wave makes it very complicated to be used in material Nondestructive Testing (NDT). In order to solve this problem, the analysis of frequency-dispersion characteristic of Lamb wave is made in this paper, and the dispersion curves of the Lamb wave in specific plate are plotted, then the physical propagation model of Lamb wave is established. Under the analysis of FFT, the expressions of the Lamb wave in specific plate are obtained. By combining with the dispersion characteristic of the Lamb wave, the changes of waveform in different propagation distances are simulated. With the deep researches of new algorithms, Lamb wave will be applied in wider area.

• Periodical: Applied Mechanics and Materials (Volumes 157-158)
• Pages: 987-990
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.157-158.987
• Online since: February 2012
• Authors: Xiao Chen, Kai Xu
• Keywords: Dispersion, Lamb Wave, Nondestructive Testing (NDT), Signal Processing

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