关键词: 弹性波散射, 交界裂纹, 传递矩阵, 远场模式

Abstract:

In this paper, the scattering of elastic waves by a plane interface crack in layered media has been investigated. By Fourier integral transform, the method of transfer matrix in elastic waves on layered media is extended to the scattering of elastic waves by a plane interface crack in layered media, and the problems are reduced to a set of dual integral equations in matrix form. As an example, the far field modes, of scattering of elastic waves by a plane interface crack in a layered half space have been presented Amplitudes in far field modes are plotted versus incident frequency for several groups of different material combinations, and the numerical results show that resonance peaks occur at some frequency. The locations of the resonance peaks in the curves coincide approximately.

Key words: elastic wave scattering, interface crack, transfer matrix, far field mode