无限区域内平面SH波的散射

The Scattering of SH-wave in Infinite Area

建立了在无限区域内求解任意形状散射体对SH波散射的数值模拟方法。采用吸收边界条件对Sommerfeld辐射条件进行近似,这种吸收边界条件具有解耦特性,简化了计算,且近似程度较高。数值计算结果与解析结果的比较表明了良好的吸收效果。另外有限元方法的应用,使其可灵活运用于具有一般几何形状的散射体和多个散射体情况。

A numerical simulation method is developed for the scattering problem of SH-wave in infinite area.By using absorbing boundary condition, the Sommerfeld radiation condition is approximated. The absorbing boundary condition has the character of solving the coupling with simplified calculations and higher accuracy. The comparisons of numerical results with the analytical solutions demonstrate the efficiency of this method. With the application of finite element method, this method can be flexibly used in simulating the scatter of general geometrical shape and multi scatters.