FREQUENCY ANALYSIS DURING NON STATIONARY INTERACTION OF TWO-LAYER VISCOSE ELASTIC SHELL WITH VISCOSE LIQUID.

The paper examined the relation between frequency and waves using the equation of deflection fluctuations, specifically in layered structures. The properties of viscosity of the layers are considered. As equations of torsional vibrations of a two-layer cylindrical shell, the equations derived by the authors in their previous works for the viscoelastic case were obtained, from which frequency equations were obtained for the case when the surface of the shell is under stress -free, and they were solved using the Maple 17 program. The graphs were analyzed for cases with different materials and thicknesses of the edge and middle layers.