Investigation of the dynamics of a three-layer shell structure of an elliptical cross-section under non-stationary dynamic loading

Abstract

The dynamic behavior of a three-layer cylindrical structure of normal elliptical cross-section with a discrete polymer filler under the action of an internal non-stationary load was studied. Finite element models of the structure were created and deformations and normal stresses of its bearing layers were calculated. Variants of structures without polymer aggregate and with aggregate of different stiffness, reinforced with ribs, were considered. A comparative analysis of the deformations and stresses of the bearing layers at the ratio of the modulus of elasticity of the material of the bearing layers and the aggregate E1.2/Et=500 and E1.2/Et=50 is given. Finite elements of the Solid and Laminate types are used in the finite-element models. The calculations were carried out by the software and calculation complex Nastran using the direct transient dynamic process algorithm.