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N.S.Gorodetskaya, T.V.Sobol An effect of viscous loss on the acoustic characteristics of surface wave in a porous-elastic medium |
Acoustic bulletin, Vol. 13 ¹ 3, (2010) |
| The solutions of the dispersion equations for permeable and impermeable free boundary of a porous-elastic half-space saturated by a viscous compressed liquid have been found on the basis of the Newton's method. For attenuation of the volume and surface waves, frequency dependencies have been obtained at variation of both the physical parameters of medium and boundary conditions. Phase velocity of the fast longitudinal, transversal and surface waves are found to be weakly dependent from frequency. In contrary, the velocity of the slow longitudinal wave demonstrates the substantial frequency dependence. |
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KEY WORDS: poroelactic medium, the Biot theory, dispersion equation, surface wave, permeability of the boundary |
| TEXT LANGUAGE: Russian |