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Ahstract-A method of the solution of scattering of horizontally polarized shear waves In an elastic plate is described.The approach is a combination of the flnite-element method and the analytical method.In this appro~ch, both the propagating and evanescent higher order modes are taken into account, and the restrictiOli in the previous work that the number .ofassumed waveguides modes be equal to the number of boundary finite-element nodal points is removed.This approach is applicable to the frequency range in which the plate waveguide 'propagates multimodes.Numerical examples on the scattering by a step discont~nuity, a wedge-shaped crack, and a metal strip arc given.
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Koshiba et al. (1987) studied this question.
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