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dc.creatorHastings, Frank D.
dc.creatorSchneider, John B.
dc.creatorBroschat, Shira L.
dc.description.abstractA method is presented for application of the perfectly matched layer (PML) absorbing boundary condition (ABC) to the P?SV velocity–stress finite?difference method. The PML consists of a nonphysical material, containing both passive loss and dependent sources, that provides ‘‘active’’ absorption of fields. It has been used in electromagnetic applications where it has provided excellent results for a wide range of angles and frequencies. In this work, numerical simulations are used to compare the PML and an ‘‘optimal’’ second?order elastic ABC [Peng and Toksöz, J. Acoust. Soc. Am. 95, 733–745 (1994)]. Reflection factors are used to compare angular performance for continuous wave illumination; snapshots of potentials are used to compare performance for broadband illumination. These comparisons clearly demonstrate the superiority of the PML formulation. Within the PML there is a 60% increase in the number of unknowns per grid cell relative to the velocity–stress formulation. However, the high quality of the PML ABC allows the use of a smaller grid, which can result in a lower overall computational cost.en_US
dc.publisherJournal of the Acoustical Society of Americaen_US
dc.rightsIn copyright
dc.subjectBoundary value problems
dc.subjectElastic waves
dc.titleApplication of the perfectly matched layer (PML) absorbing boundary condition to elastic wave propagation
dc.description.citationHastings, F.D., J.B. Schneider, and S.L. Broschat, ���Application of the perfectly matched layer (PML) absorbing boundary condition to elastic wave propagation,�� J. Acoust. Soc. Am., Vol. 100, No. 5, 3061-3069, Nov. 1996.

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  • Broschat, Shira
    This collection features research and educational materials by Shira Broschat, Professor and Curriculum Coordinator for the School of Electrical Engineering and Computer Science at Washington State University.

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