Nonlinear anharmonic disturbances of elastic surface Love waves under rigid fixation of the waveguide

Abstract

The model of geometrically and physically nonlinear deformation of anisotropic elastic medium is used in this work. A theoretical numerical-analytic solution of the boundary value problem of determining nonlinear anharmonic disturbances that are generated because of generalised Love wave propagation in a waveguide in the form of a single-crystal layer of the m3m class of a cubic system on the half-space of a single-crystal material of m3m class of a cubic system is constructed. The elastic layer on the top edge is rigidly fixed and on the bottom edge has ideal mechanical contact with the elastic halfspace. Numerical investigations have been carried out for a combination of waveguide materials: a layer of sodium chloride on the silicon half-space. Amplitude-frequency dependences for kinematic characteristics of elastic wave displacements of Love waves and their nonlinear second harmonics are researched and generalized.