TRANSIENT ELASTIC-WAVES IN A HALF-SPACE - COMPARISON OF THE DBIE-METHOD WITH THE METHOD OF GENERALIZED RAY

The two-dimensional problem of wave propagation in an elastic half-spa ce is studied by the DBIEM (Direct Boundary Integral Equation Method) combined with the finite difference procedure applied to the time vari able. The present hybrid formulation employs the fundamental solution depending neither on the frequency nor on the time variable. Time reco rds of surface responses of the half-space are computed and compared w ith those obtained by the numerical evaluation of exact analytical sol utions to this problem.