Abstract
A theoretical analysis is performed on the scattering of Rayleigh waves at a variously inclined discontinuity, where a two-dimensional sinusoidal Rayleigh wave is incident. Reflection and transmission coefficients are numerically derived. The calculable extent of the inclination angle of the interface ranges from 74° to 106° to the free surface, though it is reduced to a certain degree, according to the assumption of elasticities in both sides of the discontinuity. Within this range the variations of the coefficients are discussed under various assumptions of elastic constants in the media. The amplitude ratios of reflection and transmission do not greatly change with the inclination of the interface, but the phase shift of reflection varies linearly, and hence, by the use of the latter it is possible to determine the actual inclination of the interface from the observed Fourier spectra of incident and reflected Rayleigh waves. Scattered body waves, especially S waves, from an interface show rather complicated distributions, depending on the properties of the media.
