Author(s)

W.J. Mansur and J.A.M. Carter

Abstract

Higher Order Traction Time Approximation in Time Domain Scalar Wave Equation Analysis W. J. Mansur and J. A. M. Carter Civil Engineering Department, COPPE/UFRJ Federal University of Rio de Janeiro, CxP 68506, CEP 21945-970, Rio de Janeiro, Brazil Email: webe@coc.ufrj.br, carrer@coc.ufrj.br ABSTRACT In the present paper the traditional BEM formulation for time domain scalar wave propagation analysis is extended to a new class of problems. A procedure to consider linear time interpolation for traction (flux) is worked out and the time discontinuities are taken into account by coupling the standard boundary integral equation for displacement (potential) and the boundary integral equation for velocity. Time integration of boundary kernels is performed analytically for linear time approximation of displacements and tractions. A numerical example is presented in order to assess the accuracy of the proposed formulation. INTRODUCTION Linear and constant time interpolation functions have u

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