Geofizika, Vol. 30 No. 2, 2013.
Professional paper
A fourth-order accurate finite-difference program for the simulation of SH-wave propagation in heterogeneous viscoelastic medium
J.P. Narayan
; Indian Institute of Technology Roorkee, Department of Earthquake Engineering, Roorkee, India
Vinay Kumar
; Indian Institute of Technology Roorkee, Department of Earthquake Engineering, Roorkee, India
Abstract
This article presents a staggered grid time-domain finite-difference (FD) program for the simulation of sH-wave propagation in a viscoelastic heteroge¬neous medium. The incorporation of realistic damping in FD program is based on a rheological model widely known as generalized maxwell body (gmB-EK). The accuracy of implementation of realistic damping is validated by comparing the numerically computed frequency dependent quality factors and phase velocity with the same computed using gmB-EK rheological model and the Futterman’s relationship. The accuracy was also validated by comparing the numerically com¬puted soil amplification at resonance frequency for different damping with the analytical solutions. The stability and grid dispersion are also studied in details.
Keywords
SH-wave propagation; heterogeneous viscoelastic medium
Hrčak ID:
116076
URI
Publication date:
30.12.2013.
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