Damping layer topology and reinforced rib layout collaborative optimization method for reinforced plate shell structure

Abstract

The invention discloses a damping layer topology and reinforced rib layout collaborative optimization method for a reinforced plate shell structure, belongs to the technical field of topology optimization, and is used for solving the problem of passive vibration suppression of the reinforced plate shell structure. The method comprises the following steps: for the thin-wall plate shell structure comprising a surface damping layer and a reinforced rib layer, two types of independent design variables for describing ribs and damping topology are introduced respectively, constraints of the ribs andthe damping material consumption are considered, a damping layer and reinforced rib collaborative topology optimization model is constructed by taking minimization of dynamic response as a target, and optimal distribution design of ribs and damping of the thin-wall reinforced structure is realized. The invention provides a method for constructing a reinforced rib and damping layer layout collaborative dynamic topological optimization model. Compared with a traditional method for independently optimizing the layout of the reinforced ribs, and optimizing the layout of the laid damping materialsand the like, the method can obtain richer optimized layout results, the optimized layout results have good rigidity, vibration reduction and other mechanical properties, and a good engineering application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of topology optimization and relates to dynamic topology optimization, in particular to a method for synergistically optimizing the layout of a damping layer of a stiffened plate shell structure and a stiffened rib. Background technique [0002] Dynamic topology optimization has received extensive attention, and it has been able to realize the design of structures with maximum fundamental frequency, maximum frequency gap, and minimum dynamic response of structures. Stiffened plate and shell structures are widely used in aviation, aerospace and other fields, and the vibration control of stiffened plate and shell structures has always been an important aspect for designers to consider. [0003] In order to improve the static stiffness of the stiffened plate shell structure, some researchers optimized the layout of the stiffened ribs of the stiffened plate shell structure. Theoretical research on reinforcement...

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Problems solved by technology

[0005] At present, researchers have carried out research on the layout optimization design of stiffened ribs in stiffened plate and shell structures or the layout optimization design of laying damping layers in thin-walled plate and shell structures, but it is rare to see the collaborative optimization design of damping layers and stiffened ribs According to the research, the vibration response of the structure can be greatly reduced by synergistically optimizing the layout of the stiffened ribs and the damping layer, and good mechanical properties such as stiffness and vibration reduction can be obtained.

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