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Design method of structural topology optimization based on multi-performance constraints

A technology of topology optimization and design method, which is applied in the field of engineering structure design, can solve problems such as difficult selection of weighting coefficients, and achieve the effects of avoiding blindness in weighting coefficient selection, improving work efficiency, and high optimization solution speed

Active Publication Date: 2018-03-27
BEIJING UNIV OF TECH
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Problems solved by technology

[0006] Aiming at the problem of simultaneously optimizing the design of critical buckling load, displacement value and natural frequency, the present invention overcomes the difficulty in the selection of weighting coefficients in the original multi-objective topology optimization design method, and provides a more versatile multi-performance constraint Structural topology optimization design method

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  • Design method of structural topology optimization based on multi-performance constraints
  • Design method of structural topology optimization based on multi-performance constraints
  • Design method of structural topology optimization based on multi-performance constraints

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Embodiment 1

[0048] The specific implementation steps of the present invention will be described in detail below in conjunction with a calculation example of a multi-performance constrained plate. Among them, the base structure such as figure 2 shown.

[0049] The first step is the Geometry module, whose size is 300×300×2mm 3 The rectangular symmetric plate base structure; the Meshing module divides the base structure into 30×30 four-node shell elements; the Properties module defines the elastic modulus of the element E=68.89GPa, the Poisson’s ratio is μ=0.3, and the density is ρ =2700kg / m 3 , at the middle point of the structure, define the concentrated mass M=4kg; Loads / BCs module, at the four corners of the structure, apply fixed constraints, at the middle point of the upper boundary, apply concentrated load P=1100N; Analysis module, set BUCKLING The output options of LINEAR STATIC are buckling eigenvalues, unit strain energy and unit geometric strain energy, the output options of L...

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Abstract

The invention discloses a design method of structural topology optimization based on multi-performance constraints. The method comprises the following steps: (1) creating a finite element model of a ground structure; (2) inputting multi-performance topology optimization parameters to form an optimization model; (3) initializing variables and extracting information on the ground structure; (4) analyzing mechanical properties of the structure and extracting an analysis result; (5) displaying the optimization model; (6) solving the optimization model; (7) inverting an optimal continuous structureto obtain an optimal topology structure. With the design method, a stable and convergent topological optimization structure can be quickly obtained. The design period of the structure is shortened. Working efficiency is increased. Energy is saved while material consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of engineering structure design, in particular to a structural topology optimization design method based on multi-performance constraints. Background technique [0002] Structural topology optimization design can provide a reference for the initial design stage of engineering structures. Because it does not rely on the initial configuration and engineer experience, it can obtain completely unexpected innovative configurations, and has attracted extensive attention from scholars and engineers. Compared with size optimization and shape optimization, topology optimization has more design freedom and contributes the most to the lightweight structure, so it is favored by the majority of designers. [0003] With the development of modern industrial technology, it is not only necessary to ensure that the structure can continue to work safely and stably, but also to minimize the amount of materials used, that is, to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/04G06F2119/06
Inventor 叶红玲王伟伟苏鹏飞戴宗杰隋允康
Owner BEIJING UNIV OF TECH
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