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Journal article
Application of the perfectly matched layer (PML) absorbing boundary condition to elastic wave propagation
The Journal of the Acoustical Society of America., Vol.100(5), pp.3061-3069
11/1996
Handle:
https://hdl.handle.net/2376/6006
Abstract
A 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.
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Details
- Title
- Application of the perfectly matched layer (PML) absorbing boundary condition to elastic wave propagation
- Creators
- Frank D. Hastings (Author)John B. Schneider (Author)Shira L. Broschat (Author)
- Publication Details
- The Journal of the Acoustical Society of America., Vol.100(5), pp.3061-3069
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Identifiers
- 99900501761901842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article