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A time-domain method to solve transient elastic wave propagation in a multilayer medium with a hybrid spectral-finite element space approximation
Abstract : This paper introduces a new numerical hybrid method to simulate transient wave propagation in a multilayer semi-infinite medium, which can be fluid or solid, subjected to given transient loads. The medium is constituted of a finite number of unbounded layers with finite thicknesses. The method has a low numerical cost and is relatively straightforward to implement, as opposed to most available numerical techniques devoted to similar problems. The proposed method is based on a time-domain formulation associated with a 2D-space Fourier transform for the variables associated with the two infinite dimensions and uses a finite element approximation in the direction perpendicular to the layers. An illustration of the method is given for an elasto-acoustic wave propagation problem: a three-layer medium constituted of an elastic layer sandwiched between two acoustic fluid layers and excited by an acoustic line source located in one fluid layer.
Cited literature [43 references]
https://hal-upec-upem.archives-ouvertes.fr/hal-00686136
Contributor : Christian Soize <>
Submitted on : Saturday, April 7, 2012 - 6:02:33 PM
Last modification on : Monday, December 14, 2020 - 9:46:14 AM
Long-term archiving on: : Monday, November 26, 2012 - 1:00:44 PM
Contributor : Christian Soize <>
Submitted on : Saturday, April 7, 2012 - 6:02:33 PM
Last modification on : Monday, December 14, 2020 - 9:46:14 AM
Long-term archiving on: : Monday, November 26, 2012 - 1:00:44 PM
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