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Efficient automobile side collision safety and reliability design optimization method

A technology of side collision and optimization method, applied in mechanical equipment, CAD based on constraints, instruments, etc., can solve problems such as time-consuming, high number of calculations, and low efficiency

Active Publication Date: 2020-09-25
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has many operations, takes a long time, and has low efficiency.

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  • Efficient automobile side collision safety and reliability design optimization method
  • Efficient automobile side collision safety and reliability design optimization method
  • Efficient automobile side collision safety and reliability design optimization method

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Embodiment Construction

[0110] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples, using a method compared with Monte Carlo simulation (MCS). Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0111] Step 1: Define a mathematical model according to the requirements of automotive lightweight design reliability design optimization. This step needs to determine the deterministic design variables, random design variables and random parameters of the system, and obtain the probability distribution according to the probability and statistics characteristics of the random variables and parameters. At the same time, it is necessary to determine the objective ...

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Abstract

The invention relates to the technical field of automobile reliability design optimization, and discloses an efficient automobile side collision safety and reliability design optimization method. Themethod comprises the steps of executing reliability analysis and determinacy optimization of the method in sequence; solving the first four moments of a response are solved by using a univariate dimension reduction method, and solving the PDF of the response is solved according to the maximum entropy principle; carrying out deterministic optimization, solving a translation distance by using a performance function moving method based on response PDF, constructing and solving an equivalent deterministic optimization model, and obtaining a new optimal solution; taking the new optimal solution asinput, repeatedly executing reliability analysis and deterministic optimization processes until convergence conditions are met, and finally obtaining the optimal solution of the original optimizationmodel. According to the method, the reliability analysis and the optimization design are decoupled by utilizing the proposed performance function moving method based on the response PDF, so that the efficiency is improved; reliability analysis uses the information of the first four moments of response, higher precision can be obtained, and the method has the dual characteristics of high precisionand high efficiency.

Description

technical field [0001] The invention relates to the technical field of automobile reliability design optimization, in particular to an efficient design optimization method for automobile side collision safety reliability. Background technique [0002] With the advent of high-performance computers, the automotive industry has used multidisciplinary optimization and crashworthiness simulations to address vehicle side crash safety issues, thereby reducing the cost and time of new vehicle development. However, simulation-based optimization is often a deterministic optimal design that typically employs the limits of the design constraint boundaries. In actual engineering, there are a large number of uncertain factors such as material properties, geometric characteristics, and collision environment in the vehicle structure, which directly affect the reliability of vehicle side collisions. Reliability-based design optimization (RBDO) can not only obtain the best design scheme, but...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F111/04G06F111/08G06F111/10G06F119/02
CPCG06F30/15G06F2111/04G06F2111/08G06F2111/10G06F2119/02Y02T10/40
Inventor 张哲邓卫姜潮
Owner HUNAN UNIV
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