INFLUENCE OF FLUID VISCOSITY ON WAVES IN AN INITIALLY DEFORMED, COMPRESSIBLE, ELASTIC LAYER INTERACTING WITH A FLUID MEDIUM

The propagation of harmonic waves along the interface of an initially stressed, compressible layer and a viscous, compressible fluid half-sp ace is investigated. A dispersion relation that does not depend on the form of the elastic potential is derived on the basis of the three-di mensional linearized elasticity equations for elastic bodies with unif orm initial deformations and on the linearized Navier-Stokes equations for a viscous Newtonian fluid at rest. The phase velocities and atten uation coefficients of the elastic modes are determined numerically as functions of the thickness of the elastic layer using a Murnaghan-typ e three-invariant elastic potential.