Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6917880 | Computer Methods in Applied Mechanics and Engineering | 2013 | 16 Pages |
Abstract
We present a new numerical approach to compute the three-dimensional scattering of acoustic and elastic waves from elastic objects buried in multi-layered elastic sediments. We use a frequency-domain approach and utilize an elastodynamics formulation based on an interior-transmission representation of the scattering problem. This enables us to use the perfectly-matched-layer approximation (PML) method for exterior truncation while avoiding some fundamental problems associated with the truncation of the non-homogeneous exterior domains with coupled elasto-acoustics. We present several examples that verify the new formulation and its finite-element-based numerical implementation. We also demonstrate its application to important problems involving the computation of scattered fields from buried elastic objects buried in littoral or surf-zone domains with a multi-layered sediment modeled as three-dimensional visco-elastic material.
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Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
S. Dey, W.G. Szymczak, A. Sarkissian, J.A. Bucaro,