G.A.Voropayev, Ya.V.Zagumenniy A non-stationary deformation of a three-dimensional viscoelastic layer with varying depth |
Acoustic bulletin, Vol. 9 ¹ 2, (2006) |
| On the basis of a numerical solution of the three-dimensional non-stationary problem on oscillation of an isotropic viscoelastic layer with varying depth and finite dimensions in the longitudinal and transversal directions, a dynamic behavior of the layer subjected to a local impulse load on its surface has been determined. The amplitude and energy characteristics of the layer are obtained as the functions of the mechanical parameters of the coating, its thickness, geometry of the layer section and load location. The conditions for maximal absorption of the impulse energy are determined, depending on the mechanical and geometric parameters of the layer and duration of the loading. The role of the viscoelastic layer's geometry in a transversal direction and its thickness in forming the directed wave field on the surface has been shown. |
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KEY WORDS: a viscoelastic layer, non-stationary impulse, absorbed energy, dissipated energy, longitudinal and shear waves |
| TEXT LANGUAGE: Russian |