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

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

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 imp...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America Vol. 143; no. 2; pp. EL87 - EL92
Main Authors: Zabbal, Paul, Ribay, Guillemette, Chapuis, Bastien, Jumel, Julien
Format: Journal Article
Language:English
Published: United States Acoustical Society of America 01-02-2018
Subjects:
Acoustics
Mechanics
Physics
Online Access:Get full text
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Description
Summary: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.
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ISSN:0001-4966
1520-8524
DOI:10.1121/1.5022699