Topological optimization method of composite sandwich plate shell structure based on damping maximization

Abstract

The invention discloses a topological optimization method of a composite sandwich plate shell structure based on damping maximization. The topological optimization method comprises the following steps: according to a composite sandwich plate shell structure, extracting dimension information, material information and boundary information; establishing a mathematical model of the composite sandwich plate shell structure of a restraint layer fiber angle to be optimized; setting an order of a loss factor which is to be optimized by the composite sandwich plate shell, setting the initial quantity and the evolution step length of each layer of fiber angle of the restraint layer, and establishing an optimal model; and successively inputting each layer of fiber angle to obtain a corresponding loss factor and transmit information, and finally, outputting transmitted information to obtain a maximized loss factor of the composite sandwich plate shell structure and a fiber angle combination parameter corresponding to the maximized loss factor so as to obtain an optimal configuration of the composite sandwich plate shell structure based on the damping maximization. The optimization design of the fiber angle causes the composite sandwich plate shell structure to be subjected to the damping maximization, so that the composite sandwich plate shell structure has a good vibration attenuation and vibration absorption effect, and a calculation speed is high.

Description

technical field [0001] The invention belongs to the field of sandwich plate shell design, in particular to a topology optimization method for a composite sandwich plate shell structure based on damping maximization. Background technique [0002] The composite sandwich panel shell structure is composed of a base layer, a constrained layer and a damping layer in the middle, wherein the constrained layer is composed of laminated composite materials. Since the shear deformation of the damping layer will lead to a large amount of energy dissipation, it can effectively suppress the vibration and sound radiation of the structure, and this structure can obtain better damping effect with lighter weight, so the composite sandwich structure has been widely used In aviation, shipbuilding, automobile, pipeline transportation and other fields. [0003] At present, the research content of the composite sandwich structure mainly focuses on the optimal design of the structural parameters, t...

AI Technical Summary

Problems solved by technology

[0003] At present, the research content of the composite sandwich structure mainly focuses on the optimal design of the structural parameters, that is, to determine the properties of the damping material, the number of layers, and the thickness of the layers when the structural loss factor is maximized, and there are many optimization methods developed. In the traditional design method, although a good vibration reduction effect can be obtained, it will change the size and shape of the structure and increase the quality of the structure.

In addition, most of the modeling and calculation of structures in the optimization process currently use the finite element method, which can solve structures of various shapes but has low calculation speed and calculation accuracy

Images