中文摘要：

本文运用积分方程方法计算了单个圆柱或椭圆柱对弹性波的散射．首先，建立了散射位移场满足的积分方程，并推导了单个圆柱或椭圆柱散射体的散射截面计算公式，然后用Matlab进行了编程，给出了一个数值算例，并将计算结果与波函数展开法进行了比较．与波函数展开法相比，积分方程方法对柱型散射体的横截面形状没有限制，适合对非规则截面的柱型散射体进行计算．

英文摘要：

The scattering of elastic wave to cylinder or elliptical cylinder are studied in this paper on Integral Equation Method. Firstly, the specific expressions of displacement in integral equation for cylinder scatterer and the equations to compute the scattering cross-section of one cylinder obstacle are deduced. At last, the numerical comPutation is carried out for one composite with Maflab and compares the result with Wave Function Method. Contrast to Wave Function Method, Integral Equation Method is not restricted to the shape of scattering body, so it can apply to compute irregular section of scattering body.