TY  - JOUR
PY  - 2017//
TI  - Acoustic viscoelastic modeling by frequency-domain boundary element method
JO  - Earthquake science
A1  - Guan, Xizhu
A1  - Fu, Li-Yun
A1  - Sun, Weijia
SP  - 97
EP  - 105
VL  - 30
IS  - 2
N2  - 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.<p />  <p>Language: en</p>
LA  - en
SN  - 1674-4519
UR  - http://dx.doi.org/10.1007/s11589-017-0177-4
ID  - ref1
ER  -