Boundary-integral equation method for elastodynamic scattering by a compact inhomogeneity |
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Authors: | M Kitahara K Nakagawa J D Achenbach |
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Affiliation: | (1) Faculty of Marine Science and Technology, Tokai University, Orido, Shimizu, 424 Shizuoka, Japan;(2) Total System Institute, Shinjuku, 162 Tokyo, Japan;(3) The Technological Institute, Northwestern University, 60208 Evanston, IL, USA |
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Abstract: | The set of singular integral equations which relates unknown fields on the surface of the scatterer to a time-harmonic incident wave is solved by the boundary element method. The general method of solution is discussed in some detail for scattering by an inclusion. Results are presented for a spherical cavity, and for a soft and a stiff spherical inclusion. Fields on the surface of the scatterer are compared with previous results obtained by different methods. Back-scattered and forward-scattered displacement fields are presented, both as a function of position at fixed frequency, and as a function of frequency at fixed position. The quasi-static approximation is briefly discussed. |
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