Abstract
This paper presents a new BEM using DE-Sinc method, DE-Sinc BEM, for 2D antiplane wave problems. We apply the proposed method to wave scattering by a circular scatterer which is cavity or fixed-rigid cylinder via two approaches. One is a formulation using a regularized boundary integral equation. The other is that using a singular boundary integral equation and analytical evaluation of strong singular kernel on the boundary. The comparison of accuracy and computational time of the coefficient matrices between the proposed approaches and the conventional BEM using constant elements provides that the DE-Sinc BEM is enable to shorten computational time with enhancing the accuracy.
