The propagation of elastic waves from moving normal point loads in layered media

The steady-state response is determined of elastic layered media to buried moving normal point loads. The exact solution appears as a superposition of infinitely many rays, each of them given in closed form, in terms of algebraic functions. The solution obtained yields a local behaviour corresponding to the unbounded-space solution. The unbounded-space problem was previously solved byEason, Fulton andSneddon 8] and their solution is utilized for the present solution by superposing it on secondary fields so as to satisfy the boundary conditions. The secondary fields are obtained by the method of the differential transferm described below.