Abstract
A finite difference iterative formulation which has already been applied successfully to acoustic surface wave scattering problems in homogeneous and layered isotropic as well as non-linear media, is extended to cover Rayleigh type mode propagation in anisotropic materials. The transmission, reflection and conversion into bulk modes of Rayleigh waves are studied as a function of relative step height. The waves are incident normally at upward and downward step discontinuities formed by the sudden termination of an uniform aluminium layer on a semi-infinite fused quartz substrate. In terms of the severity of Rayleigh wave scattering, the layered upward step has the most drastic effects, followed by the layered downward and the homogeneous downward steps respectively. Rayleigh wave scattering at a break in a layered waveguide is discussed.
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