ZABBAL, Paul; RIBAY, Guillemette; CHAPUIS, Bastien; JUMEL, Julien

doi:10.1121/1.5022699

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ZABBAL, Paul
Département Imagerie et Simulation pour le Contrôle (CEA, LIST) [DISC (CEA, LIST)]

RIBAY, Guillemette
Département Imagerie et Simulation pour le Contrôle (CEA, LIST) [DISC (CEA, LIST)]

CHAPUIS, Bastien
Département Imagerie et Simulation pour le Contrôle (CEA, LIST) [DISC (CEA, LIST)]

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Journal of the Acoustical Society of America. 2018-02, vol. 143, p. EL87 - EL92

Acoustical Society of America

Resumen en inglés

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.< Leer menos