Time-domain reciprocal absorbing boundaries

Accurate and efficient computational treatments of wave propagation in unbounded media rely on special absorbing boundaries. In most of the problems, the region of interest is only a small part, the "near field", of an extensive, arguably, infinite domain. On the boundary of the near field, absorbing boundaries are introduced in order to mimic the absorption of waves into the exterior domain. They represent to various degrees of approximation the "far field" as viewed from the near field which normally contains irregularities and nonlinearities. In general, absorbing boundaries for the time-domain analysis of wave propagation in unbounded media can be classified into two categories, global and local ones. The aim of this disseration is to develop novel "global" absorbing boundaries by means of reciprocity theorems. The study deals with elastodynamics in anti-plane shear and plane strain, acoustic waves in waveguides. The domains under consideration include layered strata, layered half-spaces and the full-space.Civil, Architectural, and Environmental Engineerin