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A method for realizing multi-component design of a dual-mode casting by considering variational mold lines

A multi-component, parting line technology, applied in design optimization/simulation, computer-aided design, calculation, etc., can solve the problems of poor manufacturability, economic and process feasibility of topology optimization results

Active Publication Date: 2019-03-29
JILIN UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the poor economy and process feasibility of single-component products with complex geometric shapes obtained by existing topology optimization methods, and the poor manufacturability of topology optimization results obtained under existing manufacturing constraints. problem, providing a design method for multi-component topology optimization of dual-mode castings considering variational molding lines

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  • A method for realizing multi-component design of a dual-mode casting by considering variational mold lines
  • A method for realizing multi-component design of a dual-mode casting by considering variational mold lines
  • A method for realizing multi-component design of a dual-mode casting by considering variational mold lines

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[0255] An example is given below to verify the effectiveness of this method:

[0256] Based on the design method described in the specification, the present invention has written a program code in MATLAB that can consider the variational line to realize the multi-component topology optimization problem of the dual-mode casting. refer to Figure 10 , using the method of the present invention to realize the multi-component design of dual-mode castings considering the variational molding line to solve the multi-component topology optimization problem of the cantilever beam structure shown in the figure.

[0257] First, the cantilever beam structure is divided into 20×20 quadrilateral structural units along the horizontal and vertical directions, and the preset number of components is K=3. Unit relative density ρ i Fractions with component weights The initial values ​​of are 0.5 and 1 / K, respectively, and the design variables for the direction of the parting line (a (k) ,b (...

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Abstract

The invention discloses a method for realizing multi-component design of a dual-mode casting by considering variational mold lines, which overcomes the problems of poor economy and process feasibilityof a single-component product with complex geometrical shape obtained by the prior topology optimization method and poor manufacturability of the topology optimization result obtained under the priormanufacturing constraints. The method includes: 1, constructing the material interpolation model of structural unit in multi-component environment; 2, establishing a parametric finite element model of the design structure in multi-component environment; 3, considering the filtration of non-inverted structure, establishing the castability constraint of two-mode casting process based on herviside step function; 4, considering the variable parting line, modifying the drawing direction and obtaining the castability constraint of the modified dual-mode casting process; 5, establishing the cost constraint considering the cost of mould material in the casting process; 6, establishing a mathematical model of multi-component topology optimization based on manufacturing constraints of dual-mold casting process under the constraints of mold manufacturing cost and castability, which takes into account the variable parting line.

Description

technical field [0001] The invention relates to a design method in the field of engineering structure optimization design, more precisely, the invention relates to a design method for realizing multi-component topology optimization of dual-mode castings in consideration of variational molding lines. Background technique [0002] In the past 20 years, the application of topology optimization technology in practical engineering has become more and more extensive. Topology optimization technology aims to find the best material distribution scheme in the design space under a given load situation. Topology optimization technology can help engineers break the shackles of original design ideas and even highly engineered products, so as to obtain designs with better performance. At the same time, in the initial stage of product design and development, compared with the traditional trial-and-error design process, topology optimization will also provide engineers with a design direct...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2111/04G06F2119/18G06F30/23
Inventor 张君媛周浩舒畅刘丰郭强
Owner JILIN UNIV
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