Abstract
A linearized inverse scattering technique with the aid of the convolution quadrature time-domain boundary element method (CQBEM) has been developed for the reconstruction of a defect shape in an anisotropic plate. The convolution quadrature based BEM is more practical numerical method better than the conventional one, because the CQBEM can produce better accuracy and take stably large time steps. A Green's function is applied to the CQBEM and the inverse scattering approach to save their computational time and memory. The inverse scattering with the Born inversion is applied to the scattered wave forms which include the direct back scatter, the back scatter due to re ection at the bottom of an anisotropic plate, and the both of them. It is found that the proposed inverse scattering technique with CQBEM can reconstruct the image of a cavity properly in an anisotropic plate under the limited use of scattered wave form data.
