Multichannel Multiple Signal Classification for dispersion curves extraction of ultrasonic guided waves

The Journal of the Acoustical Society of America
Paul ZabbalJulien Jumel

Abstract

Multichannel acquisition of ultrasonic guided waves can be used to extract dispersion curves, from the time-position domain (t-x) to the frequency-wavenumber (f-k), or frequency-velocity domain (f-c). Accurate measurements are needed in order to be able to precisely characterize the specimen, by improving the extraction of low amplitude modes and enhance resolution. The proposed method is based on the MUltiple SIgnal Classification algorithm combined with a multi-emitter and multi-receiver acquisition. In this work, this method is applied on experimental data to extract dispersive information from multilayered bonded specimens.

References

Jul 26, 2003·The Journal of the Acoustical Society of America·Claire Prada, Jean-Louis Thomas
Apr 8, 2010·The Journal of the Acoustical Society of America·Bénédicte Le Crom, Michel Castaings
Dec 2, 2010·The Journal of the Acoustical Society of America·Jean-Gabriel MinonzioPascal Laugier
Jul 23, 2016·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Kailiang XuPascal Laugier
Mar 4, 2017·The Journal of the Acoustical Society of America·Wenbo ZhaoJimmy Zhu

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