摘要
利用散射幅度矩阵的概念来处理弹性波在粗糙界面弹性介质中的散射问题。利用微扰近似解边界方程,对散射幅度进行求解,得到了散射幅度的0阶、1阶和2阶解。同时分析了粗糙起伏高度符合高斯分布时,散射幅度的数学期望值和方差,它们分别代表平均场和声场在偏离镜面方向的起伏。最后进行了实验。
Scattering of elastic waves by a rough free surface is studied. The analysis is based on the concept of scattering amplitude (SA) which is the amplitude of the scattered wave. SA method is very convenient for the rough surface problem. By solving the boundary equations, It gets the first and second order solutions. The general result is used for an example-the wave scattering by rough surfaces with Gaussian distribution. The mean field and variance are given. At last, an experiment is designed to verify the theoretical result.
出处
《声学学报》
EI
CSCD
北大核心
2003年第2期107-115,共9页
Acta Acustica
基金
国家自然科学基金资助项目(19774062)
