Kirchhoff evaluation of scattered elastic wavefields in anisotropic media

Three-dimensional elastic wave scattering is addressed for the case of gene ral anisotropic materials. For traction-free scatterers the elastodynamic K irchhoff approximation is applied, which is valid at high frequencies and n ear specular angles. Based on a mathematical formulation including Green's triadic stress tensor function, asymptotic evaluation yields the displaceme nt vector of the scattered wavefield in a form which is convenient for effe ctive numerical computation. The (point source) far-field approximation app lied to Green's triadic function is valid in noncaustic regions. (C) 2000 A coustical Society of America. [S0001-4966(00)00805-5].