Computer Science
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ep%26s...58..555s&link_type=abstract
Earth, Planets and Space, Volume 58, p. 555-567.
Computer Science
2
Scientific paper
We simulate SH wave scattering by 2-D parallel cracks using the finite difference method (FDM), instead of the popularly used boundary integral equation method (BIEM). Here special emphasis is put on simplicity; we apply a standard FDM (fourth-order velocity-stress scheme with a staggered grid) to media in cluding traction-freecracks, which are expressed by arrays of grid points with zero traction. Two types of accuracy tests based oncomparison with a reliable BIEM, suggest that the present method gives practically sufficient accuracy, except for the wavefields in the vicinity of cracks, which can be well handled if the second-order FDM is used instead. As an application of this method, we also simulate wave propagation in media with randomly distributed cracks of the same length. We experimentally determine the attenuation and velocity dispersion induced by scattering from the synthetic seismograms, using a waveform averaging technique. It is shown that the results are well explained by a theory based on the Foldy approximation for crack densities of up to about 01. The presence of a free surface does not affect the validity of the theory. A preliminary experiment also suggests that the validity will not change even for multi-scale cracks.
Kawahara Jun
Miyashita Kazuhisa
Okamoto Tohru
Suzuki Yasuhiro
No associations
LandOfFree
Simulations of SH wave scattering due to cracks by the 2-D finite difference method does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Simulations of SH wave scattering due to cracks by the 2-D finite difference method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulations of SH wave scattering due to cracks by the 2-D finite difference method will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1007241