The wave field patterns of the propagation of longitudinal and transverse elastic waves in grain-oriented rocks

Abstract

In the work under consideration, on the basis of data analysis on the velocities of quasi-longitudinal Vp and quasi-transverse Vs waves—measured for rock samples at high pressures and temperatures, and analogous velocities, calculated on the basis of the grain orientation distribution function, reconstructed from the neutron-diffraction textural experiment—the indicative inconsistencies between the experimental and model characteristics were inferred. The theoretical analysis of the wave field patterns of the propagation of longitudinal and transverse elastic waves in the anisotropic media is carried out. It is established that, in the general case, in the anisotropic inhomogeneous media the velocities of Vp and Vs propagation, measured experimentally and obtained from the modeling, cannot coincide due to the existence of the physical coupling between the vibrations of two types: transverse and longitudinal vibrations.