Part structure topology optimization design method based on compromise decision

A technology of topology optimization and design method, applied in the field of mechanical design to achieve the effect of improving design efficiency

Active Publication Date: 2018-04-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In view of this, the present invention provides a part topology optimization design method based on compromise decision-making, which can effectively solve multi-objective part configuration design problems with conflicting design requirements by using topology optimization technology combined with compromise decision-making mathematical models

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  • Part structure topology optimization design method based on compromise decision
  • Part structure topology optimization design method based on compromise decision
  • Part structure topology optimization design method based on compromise decision

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] This embodiment provides a method for part topology optimization design based on compromise decision, such as figure 1 As shown, this method uses topology optimization technology to establish the preliminary structural configuration of the part, and builds the topological model of the part structure based on the compromise decision-making mathematical model, that is, the part structure topology model based on compromise decision-making (T&C mathematical model for short), by solving the T&C mathematical model The model solves the multi-objective topology design problem, so as to obtain the satisfactory solution closest to the design requirements.

[0043] In this embodiment, the "Topological Structure Design of Aircraft Carrying Car" is taken as an example, and its design requirements are as follows:

[0044] (1) The trolley is used to carry a cy...

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Abstract

The present invention aims at the problem of contradictions between multiple objectives in the design of the parts topology, and proposes a part structure topology optimization design method based oncompromise decision. The method comprises: using topology optimization to solve the layout of parts structures under the removal rates of different materials, and by carrying out static analysis of the original structure and comparing the overlays under the removal rates of different materials, determining key geometric parameters affecting the structural performance and an initial layout model ofthe structure; using target requirements to analyze and determine key material parameters and compromise decision-making target variables and deviation variables; and taking the key geometric parameters and the material parameters determined by the method as system variables for compromise decision, obtaining a functional relationship between target variables and system variables through responsesurface analysis and regression analysis, and in combination with the constraints of variables, establishing a compromise decision mathematical model.

Description

technical field [0001] The invention relates to an optimization design method, in particular to a part topology optimization design method, which belongs to the field of mechanical design. Background technique [0002] The topological relationship of the structure affects the expression of the physical properties of the structure, so the physical properties of the structure can be optimized by changing the topological relationship of the structure. In the stage of product conceptual design, topology optimization can effectively, quickly and accurately determine the initial structural configuration of products that are completely unfamiliar or require a relatively large degree of modification design. Therefore, topology optimization technology has been widely used in engineering design. [0003] Since topology optimization is a non-parametric optimization, it is impossible to directly solve the specific size of the structural configuration; in addition, in multi-objective de...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2111/06G06F2119/06
Inventor王国新陈舒婷阎艳
OwnerBEIJING INSTITUTE OF TECHNOLOGYGY