Accession Number : AD0607551

Title :   SCATTERING OF ELASTIC WAVES BY SMALL INHOMOGENEITIES,

Corporate Author : TRW SPACE TECHNOLOGY LABS LOS ANGELES CALIF

Personal Author(s) : Miles,John W.

Report Date : 19 OCT 1959

Pagination or Media Count : 15

Abstract : Rayleigh scattering theory is extended to determine the perturbation on an arbitrarily prescribed elastic wave field produced by small inhomogeneities in an otherwise homogeneous, isotropic medium. The general result is applied to the specific problems of the scattering of both plane P- and S-waves. It is found that a change in compressibility acts at a distance as a simple source and a change in density as a dipole, as in the acoustical problem, while a change in shear modulus contributes both simple-source and quadrapole fields. (Author)

Descriptors :   (*MECHANICAL WAVES, SCATTERING), ACOUSTICS, ELASTIC PROPERTIES, DIPOLE MOMENTS, QUADRUPOLE MOMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE