Multi-wave transient and harmonic infinite elements for two-dimensional unbounded domain problems

Using the governing differential equations of wave propagation problems and making use of the Galerkin weighted residual method, discretized formulati ons in the Laplace transform domain for the transient behaviour of unbounde d domain problems have been presented for linear elastic and visco-elastic foundations. In this paper, two infinite elements, harmonic and transient, are presented. These elements are capable of considering three different wa ve types simultaneously. Examples considered in this study indicate that pr esent formulations have sufficient computational accuracy for the solution of the transient and harmonic response of unbounded media problems. (C) 199 9 Elsevier Science Ltd. All rights reserved.