Thin film structure reinforcing band layout optimization method and system based on genetic algorithm

Abstract

The invention discloses a thin film structure reinforcing band layout optimization method and system based on a genetic algorithm, and belongs to the technical field of thin film structures. The layout optimization method comprises the following steps: s1, setting reinforcing band design parameters, and constructing layout optimization parameters; s2, setting genetic algorithm parameters, and initializing a population; s3, decoding the population to obtain a strengthening band layout optimization parameter, establishing a nonlinear finite element model, and solving at the same time; s4, calculating a target function based on a solving result; s5, calculating the fitness by using the target function, and judging whether a stop criterion is met or not; s6, if the stop criterion is not met, performing selection, crossover and mutation operation on the population, and repeating the steps S3 to S5; and s7, if a stop criterion is met, ending the circulation, and outputting an optimal individual. According to the method, the thin film structure reinforcing band layout is optimized through the genetic algorithm, wrinkles of the thin film structure can be effectively avoided, and the performance of the thin film structure is improved.

Description

technical field [0001] The invention relates to the technical field of thin film structures, in particular to a genetic algorithm-based method and system for optimizing the layout of reinforcement strips of thin film structures. Background technique [0002] Thin-film structures are characterized by light weight and easy folding and storage, and are widely used in spacecraft structures, such as solar sails and thin-film antenna arrays. However, the thickness of the thin film structure is small, the bending stiffness is small, and it is prone to wrinkle deformation under the action of pressure load. The existence of wrinkles may affect the static and dynamic characteristics of the thin film structure, and then affect the performance of the spacecraft. Usually in engineering design, it is necessary to set a certain number of reinforcement strips on the membrane structure to improve the mechanical properties of the membrane structure and reduce wrinkle deformation at the same t...

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Problems solved by technology

[0004] In the current engineering design, the layout of the reinforcement belt of the membrane structure is mostly designed based on engineering experience, lacking mature theoretical guidance, and the wrinkle deformation of the membrane structure is a key design index that affects the performance of the membrane

The existing design methods generally do not consider the influence of the reinforcement strip layout on the wrinkle deformation of the membrane structure, so it is urgent to optimize the reinforcement strip layout of the membrane structure to improve the performance of the membrane structure

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