Lightweight design method for large and medium-sized parts based on generative optimization and guided reconfiguration

Abstract

The present invention provides a method for lightweight design of large and medium-sized parts based on generative optimization and oriented reconstruction, which includes the steps of: establishing an original model, selecting manufacturing materials, performing stress and deformation analysis on the original model and judging whether the material selection is suitable, Generative topology optimization is performed on the original model, and generative optimization design schemes are screened according to the evaluation model; guided by traditional processing technology, the model of the generative optimization scheme is reversely reconstructed and analyzed again for stress and deformation, and the strength and Stiffness; perform secondary or multiple reconstructions on the reconstructed model that does not meet the design requirements until a result that meets the design requirements is obtained. The invention breaks through the limitation that topology optimization structure depends on additive manufacturing, and solves the problem that topology optimization technology is difficult to be widely used under the influence of limitations of additive manufacturing technology, such as limited molding size, high risk of processing failure, and high manufacturing cost. , and effectively reduce the weight, processing difficulty and manufacturing cost of large and medium-sized parts.

Description

technical field [0001] The invention belongs to the technical fields of model design and metal processing and manufacturing, and in particular relates to a lightweight design method for large and medium-sized parts based on generative optimization and guided reconstruction. Background technique [0002] In engineering applications, structural lightweight design means less material cost and lower energy consumption, and has a wide range of applications in many fields such as aerospace and automobile manufacturing. [0003] Generative topology optimization design is a structural lightweight design method that integrates generative design and topology optimization design. The so-called generative design is a design method that can explore all possible solution combinations according to the designer's intention, thereby quickly generating alternatives. Topology optimization technology takes material distribution as the optimization object, and can find the best material distrib...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention constructs the target stress value calculation model and the optimal design scheme evaluation model, adopts generative topology optimization technology, realizes the lightweight design of the target structure to the greatest extent, and obtains the best force transmission performance. While optimizing the model, guided by the traditional molding process, reversely reconstruct the model of the optimal solution, and analyze the stress and deformation of the reconstructed model again, and check the strength and stiffness; according to the information fed back from the check result , perform secondary or multiple reconstructions on the reconstruction model that does not meet the design requirements, until the results that meet the design requirements are obtained, breaking through the limitation that the complex topology optimization structure under the existing technology depends on additive manufacturing, and solving the problem in The molding size of additive manufacturing technology is limited, it is difficult to form large and medium-sized parts, and the risk of processing failure in the accumulation molding process is high, and the manufacturing cost is high. Under the influence of limitations, topology optimization technology is difficult to be widely used. For large and medium-sized parts parts, which can effectively reduce product weight, processing difficulty, manufacturing cost and transportation cost

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