Author(s)

A.J.B. Tadeu & F.A.S. Paulo

Abstract

The Boundary Element Method (BEM) is used to determine the scattering of elastic waves by cavities buried in a two-dimensional elastic medium when struck by dynamic line sources. The BEM is formulated in the frequency domain by means of Green's functions. The boundary of the cavity is discretized using constant, linear and quadratic elements. The element in the full system of equations generated by BEM results from integrations of the Green's functions and its derivatives along the discretized boundaries. The diagonal terms are the dominant ones in this system of equations, and therefore its solution is highly dependent on those terms. The integrations needed to produce the diagonal terms involve singularities. Thus, the integration of those singularities play

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