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Multi-component topological optimization design and processing method and system for microstructure product

A technology of topology optimization and design method, applied in the direction of geometric CAD, etc., can solve the problems of the connection part of the microstructure unit, the physical properties and manufacturing process constraints of the connection part of the component are not considered, and the calculation efficiency is low.

Active Publication Date: 2020-04-17
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing multi-component topology optimization method is mainly aimed at the optimization of solid components, and it is directly applied to large components composed of microstructures, which will have the following problems: the microstructure may be divided into multiple components during processing, resulting in There are huge challenges in the connection of microstructural units of multiple components
At the same time, the current multi-component topology optimization method based on the gradient method does not consider the physical properties of the component connection part and the constraints of the manufacturing process. Very low, unable to meet the requirements of thousands or even hundreds of thousands of millions of design variable optimization

Method used

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  • Multi-component topological optimization design and processing method and system for microstructure product
  • Multi-component topological optimization design and processing method and system for microstructure product

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Embodiment 1

[0092] This embodiment discloses a multi-component topology optimization design method for microstructure products, including the following steps:

[0093] Step 1. Set the design domain of topology optimization as Ω; construct a pseudo-density design variable (topological geometric design variable) φ, φ is a continuous function in the design domain Ω, and the value of φ at each position in the design domain Ω represents the design Whether the material is arranged at the corresponding position in the domain Ω, -1≤φ≤1; construct a multi-component design vector (μ 1 , μ 2 ,..., μ k ,..., μ K ), where μ k Denotes the kth component design variable, μ k is a continuous function in the design domain Ω, μ k The value taken at each position in the design domain Ω represents the possibility that the corresponding position in the design domain Ω belongs to the kth component, 0≤μ k ≤1, k=1, 2, ..., K, K is the maximum number of components to divide the design domain into (manually s...

Embodiment 2

[0151] This embodiment discloses a multi-component processing method for a microstructure product, comprising the following steps:

[0152] Step i, using the multi-component topology optimization microstructure design method in Example 1 to solve φ, μ k The optimal value of , and its corresponding pseudo-density design variable ρ, variable m k , the average pseudo-density design variable ρ l and parameter ω k ;

[0153] Step ii, obtain the mathematical model of each component that forms this microstructure according to the following formula:

[0154] C k = ρm k +g(ρ l )(1-m k )ω k

[0155] Among them, C k Indicates the kth component that constitutes the microstructure;

[0156] Step iii, using processing equipment to process all components according to the mathematical model of each component of the microstructure;

[0157] Step iv, assembling each component to obtain a microstructure product.

Embodiment 3

[0159] This embodiment discloses a multi-component topology optimization design system for microstructure products, including a memory and a processor, and a computer program is stored in the memory, and when the computer program is executed by the processor, the processor realizes The microstructure product multi-component topology optimization design method in the above-mentioned embodiment 1.

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Abstract

The invention discloses a multi-component topological optimization design and a processing method and a system for a microstructure product. The method comprises the steps of constructing a pseudo density design variable phi and a multi-component design vector (mu1, mu2,..., muk,..., muK), taking the minimum flexibility as a target function, and considering the volume fraction ratio constraint ofmaterial use, the size constraint of each component, the local average density constraint, the multi-component entity interface and the volume constraint of a connection part; solving the target function to obtain the optimal values of phi and mu k; and according to the optimal values of phi and mu k, determining whether materials are arranged at each position in the design domain omega, and forming a microstructure product model by all parts of the materials arranged in the design domain omega. In the design process of the microstructure product, the size constraint of the machining method, the assembly connection mode of the assembly and the physical attribute of the assembly connection part in the machining process of the microstructure product are considered, the method is a design andmanufacturing integrated method, and the high-precision machining requirement of large components of complex products can be met.

Description

technical field [0001] The invention belongs to the fields of topology optimization, microstructure product design and processing, functional gradient microstructure, design and manufacture integration, and 3D printing, and specifically relates to a microstructure product multi-component topology optimization design, processing method and system. Background technique [0002] The microstructure not only has the characteristics of light weight and excellent performance, but also can realize many functions such as negative Poisson's ratio, zero thermal expansion, high heat dissipation ratio and performance ratio, as well as frequency band sound absorption performance and light guidance, so it is widely used in automobiles, ships, trains, etc. There is a great demand for industrial applications in the fields of aerospace and aerospace. [0003] The existing design method of microstructure products (products composed of microstructures, including large components composed of mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17
Inventor 易兵彭勇姚松李雄兵杨岳汪馗李盈利饶燕妮
Owner CENT SOUTH UNIV
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