Propagation in an elastic wedge using the virtual source technique

The virtual source technique, which is based on the boundary integral method, provides the means to impose boundary conditions on arbitrarily shaped boundaries by replacing them by a collection of sources whose amplitudes are determined from the boundary conditions. In this paper the virtual source...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2007-03, Vol.121 (3), p.1374-1382
Main Authors: Abawi, Ahmad T., Porter, Michael B.
Format: Article
Language:English
Subjects:
Acoustics
Elasticity
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Models, Theoretical
Oceans and Seas
Physics
Sound
User-Computer Interface
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Summary:The virtual source technique, which is based on the boundary integral method, provides the means to impose boundary conditions on arbitrarily shaped boundaries by replacing them by a collection of sources whose amplitudes are determined from the boundary conditions. In this paper the virtual source technique is used to model propagation of waves in a range-dependent ocean overlying an elastic bottom with arbitrarily shaped ocean-bottom interface. The method is applied to propagation in an elastic Pekeris waveguide, an acoustic wedge, and an elastic wedge. In the case of propagation in an elastic Pekeris waveguide, the results agree very well with those obtained from the wavenumber integral technique, as they do with the solution of the parabolic equation (PE) technique in the case of propagation in an acoustic wedge. The results for propagation in an elastic wedge qualitatively agree with those obtained from an elastic PE solution.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.2431336