A Topological Optimization Design Method for Reliability of Component Structures Considering Bounded Mixed Uncertainties

An uncertainty and topology optimization technology, applied in design optimization/simulation, constraint-based CAD, instrumentation, etc.

Active Publication Date: 2022-04-19
ZHEJIANG UNIV
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Problems solved by technology

[0004] In order to solve the reliability topology optimization design problem of part structure under the influence of multi-source uncertainty, the present invention provides a reliability topology optimization design method of part structure considering bounded mixed uncertainty
The invention efficiently solves the reliability topology optimization design problem of the part structure under the coexistence of uncertain factors in the probability interval, and has good engineering application value

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  • A Topological Optimization Design Method for Reliability of Component Structures Considering Bounded Mixed Uncertainties
  • A Topological Optimization Design Method for Reliability of Component Structures Considering Bounded Mixed Uncertainties
  • A Topological Optimization Design Method for Reliability of Component Structures Considering Bounded Mixed Uncertainties

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[0068] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0069] The information involved in the figure is the actual application data of the present invention in the reliability topology optimization design of the outer cutter head support structure of a certain type of shield machine, figure 1 It is a flow chart of topology optimization design of part structure reliability considering bounded mixed uncertainty.

[0070] 1. to figure 2 The outer cutter head support structure of a certain type of shield machine made of high-strength low-alloy steel material is used as the research object, and the uncertainty of the support structure in the process of manufacturing and service is considered:

[0071] 1.1) image 3 is the relevant dimensions of the initial design of the outer cutterhead support structure of the shield machine, Figure 4 Sets the case for the bounds used for co-robust optimization. ...

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Abstract

The invention discloses a component structure reliability topology optimization design method considering bounded mixed uncertainty. It includes the following steps: considering the uncertainty in the manufacturing service of the part structure, describing the external load with insufficient samples and the material properties with sufficient samples as interval variables and bounded probability variables respectively; discretizing the part structure design domain, setting the physical and geometric Constraints, establish a reliability topology optimization design model. Using the moving asymptote method to solve: decoupling probability interval uncertainty, using constraint performance gradient to determine the worst working condition; defining worst working condition performance fluctuations to calculate constraint performance reliability; finally calculating the gradient of the target and constraint functions to the design variables for iteration. The optimal design model established by the invention truly reflects the distribution characteristics of the multi-source uncertainty of the part structure, is efficient in solving, and has good engineering application value.

Description

technical field [0001] The invention belongs to the field of equipment structure optimization design, and relates to a component structure reliability topology optimization design method considering bounded mixed uncertainty. Background technique [0002] As a method of adjusting the distribution of limited materials in the design domain to optimize the performance of structural targets, topology optimization has been widely used in product design. Due to various uncertainties in the process of manufacturing and use, in order to prevent the performance of the theoretical results obtained by topology optimization from deteriorating after actual manufacturing, the influence of uncertainties must be considered in the design stage. However, in the traditional reliability topology optimization method, the extensive approach of only using a single type of mathematical model to describe multi-source uncertainties is likely to lead to the distortion of uncertainty modeling and the f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F111/04G06F119/14
CPCG06F30/17G06F30/23G06F2111/04G06F2119/14
Inventor 程锦陆威刘振宇刘达新谭建荣
Owner ZHEJIANG UNIV
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