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Sponge boundary condition for frequency-domain modeling

Cited 27 time in Web of Science Cited 35 time in Scopus
Authors
Shin, Changsoo
Issue Date
1995
Publisher
Society of Exploration Geophysicists (SEG)
Citation
Geophysics, 60, 1870-1874
Abstract
Several techniques have been developed to get rid of
edge reflections from artificial boundaries. One of
them is to use paraxial approximations of the scalar
and elastic wave equations. The other is to attenuate
the seismic waves inside the artificial boundary by a
gradual reduction of amplitudes. These techniques
have been successfully applied to minimize unwanted
seismic waves for time-domain seismic modeling. Unlike
time-domain seismic modeling, suppression of
edge reflections from artificial boundaries has not been
successful in frequency-domain seismic modeling.
Rayleigh waves caused by coupled motions of P- and
S-waves near the surface have been a particularly
difficult problem to overcome in seismic modeling. In
this paper, I design a damping matrix for frequencydomain
modeling that damps out seismic waves by
adding a diffusion term to the wave equation. This
technique can suppress unwanted seismic waves, including
Rayleigh waves and P- and S-waves from an
artificial boundary.
ISSN
0016-8033
Language
English
URI
https://hdl.handle.net/10371/6109
DOI
https://doi.org/10.1190/1.1443918
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Energy Systems Engineering (에너지시스템공학부)Journal Papers (저널논문_에너지시스템공학부)
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