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Acoustic viscoelastic modeling by frequency-domain boundary element method.
- Source :
-
Earthquake Science . Apr2017, Vol. 30 Issue 2, p97-105. 9p. - Publication Year :
- 2017
-
Abstract
- Earth medium is not completely elastic, with its viscosity resulting in attenuation and dispersion of seismic waves. Most viscoelastic numerical simulations are based on the finite-difference and finite-element methods. Targeted at viscoelastic numerical modeling for multilayered media, the constant- Q acoustic wave equation is transformed into the corresponding wave integral representation with its Green's function accounting for viscoelastic coefficients. An efficient alternative for full-waveform solution to the integral equation is proposed in this article by extending conventional frequency-domain boundary element methods to viscoelastic media. The viscoelastic boundary element method enjoys a distinct characteristic of the explicit use of boundary continuity conditions of displacement and traction, leading to a semi-analytical solution with sufficient accuracy for simulating the viscoelastic effect across irregular interfaces. Numerical experiments to study the viscoelastic absorption of different Q values demonstrate the accuracy and applicability of the method. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16744519
- Volume :
- 30
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Earthquake Science
- Publication Type :
- Academic Journal
- Accession number :
- 123904031
- Full Text :
- https://doi.org/10.1007/s11589-017-0177-4