N.S.Gorodetskaya Wave attenuation at symmetric vibrations of a porous-elastic layer with free surfaces |
Acoustic bulletin, Vol. 1 ¹ 4, (1998) |
| The dispersion characteristics of the normal waves in porous-elastic strip with free surfaces are studied on the basis of the Biot's theory both for the cases of closed and open boundary pores. The influence of the dissipative effects caused by fluid flow in the pores on the dispersion spectrum is analyzed. Involving of dissipation is shown to make the different effect on the behavior of "fluid"- and "solid-like" waves. The "fluid-like" waves demonstrate much stronger response on varying of the parameters describing this type of dissipation. With the allowance of dissipation, spectrum rearrangement for the "solid-like" waves in the porous-elastic layer is in general similar to that in viscoelastic one. |
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KEY WORDS: the Biot theory, visco-elastic medium, dissipation, normal waves |
| TEXT LANGUAGE: Russian |