SCATTERING OF SH-WAVES BY MULTIPLE SEMI-CYLINDRICAL CANYONS
Xu Yiyan Han Feng(Institute of Engineering Mechanics,State Seismological Bureau) (Harbin Architectural and Civil Engineering)
In this paper the scattering of SH-wave by multiple semi-cylindrical canyons are studied by using complex function and multi-polar coordinate method . The so-called scattering wave function in the neighborhood of the multiple semi-cylindrical canyons is formed and then,using the moving coordinate system,the boundary condition of the given multiple semi-cylindrical canyons will be satisfied step by step. Thus the problems to be solved can be summarized as the solution of an infinite set of algebraic equations. Finally ,the problem of scattering of SH wave in the neighborhood of two semi-cylindrical canyons with same dimension is examined. Numerical results and discusions of displacements and phases on the surface of, the canyons are given.