| Autor: |
Guz, O. M., Bagno, O. M. |
| Předmět: |
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| Zdroj: |
International Applied Mechanics; Jan2021, Vol. 57 Issue 1, p1-10, 10p |
| Abstrakt: |
The problem of acoustic wave propagation in a prestrained compressible elastic half-space that interacts with a layer of viscous compressible fluid is solved using the linearized three-dimensional equations of the theory of finite strains for the half-space and the linearized three-dimensional Navier–Stokes equations for the fluid. A problem statement and an approach based on the general solutions of the linearized equations for elastic solid and fluid are applied. A dispersion equation that describes the propagation of harmonic waves in the hydro-elastic system is obtained. The dispersion curves for the normal waves in a wide frequency range are constructed. The effect of the initial stresses of the elastic half-space and the thickness of the liquid layer on the phase velocities and attenuation coefficients of acoustic waves is analyzed. It is shown that the influence of the viscosity of the fluid and the initial stresses on the wave parameters is associated with the localization properties of waves. The developed approach and the findings make it possible to establish the limits of applicability of the models of wave processes, based on different versions of the theory of small initial strains, the classical theory of elasticity, as well as the model of the ideal fluid. The numerical results are presented in the form of graphs and analyzed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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