Scattering of SH Waves by Subsurface Topography

by Marijan Dravinski, Research Asst. Prof.; Dept. of Civ. Engrg., Univ. of Southern California, Los Angeles, Calif. 90007,


Serial Information: Journal of the Engineering Mechanics Division, 1982, Vol. 108, Issue 1, Pg. 1-17


Document Type: Journal Paper

Abstract:

Horizontally polarized shear waves in an elastic alluvial valley of arbitrary shape perfectly bonded to a linearly elastic, homogeneous and isotropic half space are considered. The valley is subjected to a steady state horizontal displacement field. Total displacement field is evaluated along the interface between the half space and alluvial valey. Comparison with known exact solutions for simple geometry provided the following conclusions: 1) the method provides excellent results for wide range of frequencies, 2) for a fixed number of sources, the results are more accurate at lower frequencies, and 3) as the number of sources increases, the accuracy increases.



Subject Headings: Subsurface environment | Topography | Shear waves | Elastic analysis | Half space | Displacement (mechanics) | Alluvial channels | Arbitration

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