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Journal articles
Non-stationary elastic wavefields from an apodized normal transducer. Near-field asymptotics and numerics
Abstract : We simulate non-stationary radiating near-field of a normal transducer acting at the surface of an isotropic homogeneous elastic half-space. The transducer is assumed large compared to the characteristic wavelength. Effects of non-constance of distribution of pressure over the aperture of the transducer on the wavefield are considered in detail. These are i) excitation of a plane S-wave, ii) anomalous polarization in the plane P-wave, and iii) suppression of edge waves by an apodization of the pressure distribution. Asymptotic formulas are tested against a numerical method based on new mixed finite elements. The agreement is found excellent within the bounds of the asymptotic theory.
https://hal-ensta-paris.archives-ouvertes.fr//hal-00982677
Contributor : Aurélien Arnoux <>
Submitted on : Thursday, April 24, 2014 - 11:27:25 AM
Last modification on : Thursday, January 14, 2021 - 11:56:04 AM
Contributor : Aurélien Arnoux <>
Submitted on : Thursday, April 24, 2014 - 11:27:25 AM
Last modification on : Thursday, January 14, 2021 - 11:56:04 AM