Dynamics of layered conical shells under non-stationary loading

The peculiarities of the oscillatory process of the bearing layers of three-layer conical shells depending on changes in the geometric and physical and mechanical characteristics of the material of their bearing layers at different properties of the polymeric filler material of the structure are investigated. Theсases of dynamic behavior of three-layer conical shells are considered and a comparative analysis of the parameters of the stress-strain state characteristics at different ratios of elasticity of the bearing layers of the structure and the polymer aggregate material is given.Taking into account the difference in the material parameters of the bearing layers and the distance between the reinforcing ribs of the structure exceeding the value of their cross section, the model of the shear theory of shells and rods by S. P. Timoshenko was used in the study.Finite-element modeling and numerical calculations of normal deflections and normal stresses of the bearing layers of the structure, which determine its stress-strain state, were performed.The influence of the elasticity of the polymer aggregate on the dynamic behavior of three-layer conical shells under non-stationary loading was evaluated.The article shows that by changing the material of the conical shell package, the thickness of the bearing layers and the elasticity of the aggregate, it is possible to select a structure design with the predicted dynamic behavior under non-stationary loading.The obtained results of the study of dynamic processes in the considered three-layer structures under different geometrical and mechanical parameters can be of significant interest for design developments.