A vehicle body crashworthiness optimization method

An optimization method and crashworthiness technology, applied in multi-objective optimization, design optimization/simulation, genetic rules, etc., can solve problems such as poor practicability, high cost, and safety optimization that cannot meet expectations, so as to improve accuracy and efficiency , improve security, and reduce development costs

Pending Publication Date: 2018-12-11
HUNAN UNIV
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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a method for optimizing the crashworthiness of a vehicle body, which is used to solve the problems of high cost, poor practicability and unreachable safety optimization caused by parameter determination of optimization variables in the prior art. expected problem

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  • A vehicle body crashworthiness optimization method
  • A vehicle body crashworthiness optimization method
  • A vehicle body crashworthiness optimization method

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Embodiment Construction

[0021] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0022] The current multi-objective optimization of the crashworthiness of automobile bodies mostly does not consider the uncertainty of parameters and their correlations. However, in the actual production process of automobiles, there will inevitably be errors in processing and manufacturing, which will cause the thickness, material and other parameters to vary. Uncertainty, and these parameters may also be interrelated. The uncertainty and correlation of these parameters will lead to deviations in the optimization results of crashworthiness, and the vehicle safety cannot meet the expected req...

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Abstract

The invention relates to a vehicle body crashworthiness optimization method, belonging to the technical field of automobile safety optimization. The vehicle body crashworthiness optimization method includes selecting a plurality of objective objects for optimizing the crashworthiness of the vehicle and selecting structural or material parameter of a plurality of specified components as optimization variables when the vehicle body collides, wherein the structural or material parameters of the plurality of specified components are uncertain parameters; according to the selected optimization object and optimization variable, establishing a multi-objective optimization model of vehicle body crashworthiness by using the multi-dimensional parallelepiped interval model; solving the multi-objective optimization model by using the micro-interval multi-objective genetic algorithm, obtaining an optimal solution set, selecting the optimal solution from the optimal solution set, and taking the selected optimal solution as the optimal parameter value. The method effectively improves the precision and efficiency of the crashworthiness optimization of the automobile body, improves the safety of the automobile product, and achieves the purpose of reducing the development cost.

Description

technical field [0001] The invention relates to the technical field of automobile safety optimization, in particular to a method for optimizing the crashworthiness of a vehicle body. Background technique [0002] Crashworthiness is a key performance that must be considered in the optimal design of the car body. The parts that affect the crashworthiness of the car body are usually the parts used to deform and absorb energy when the car collides, such as the front side member, the front cover of the car, etc. The components of these parts Energy absorption characteristics and deformation modes determine the force, displacement, and acceleration of a car during a collision, and play a key role in the protection of car occupants. [0003] Most of the current multi-objective optimization techniques for crashworthiness of automobile bodies require the determination of the parameters of the optimization variables. In this way, for uncertain parameters that are difficult to obtain s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/12
CPCG06F30/15G06F30/20G06F2111/06G06N3/126
Inventor 刘桂萍罗瑞姜潮刘晟
Owner HUNAN UNIV
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