An Efficient Design Optimization Method for Safety and Reliability of Vehicle Side Collision

A technology of side collision and optimization method, which is applied in mechanical equipment, CAD based on constraints, instruments, etc., can solve problems such as large number of calculations, long time-consuming, low efficiency, etc., to expand the scope of application, solve problems with higher complexity, high The effect of precision

Active Publication Date: 2022-06-07
HUNAN UNIV
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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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  • An Efficient Design Optimization Method for Safety and Reliability of Vehicle Side Collision
  • An Efficient Design Optimization Method for Safety and Reliability of Vehicle Side Collision
  • An Efficient Design Optimization Method for Safety and Reliability of Vehicle Side Collision

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

[0111] The first step: define a mathematical model according to the requirements of reliability design optimization of automotive lightweight design. 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 statistical characteristics of the random variables and parameters. At the same time, it is necessary to determine the objective function, establish the system function function, and set the target reliability.

[0112] For side imp...

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Abstract

The invention relates to the technical field of automobile reliability design optimization, and discloses an efficient method for optimizing the safety reliability design of automobile side collisions. The reliability analysis and deterministic optimization of the method are performed in sequence, and the single variable dimensionality reduction method is firstly used to obtain The first four moments of the response, and the PDF of the response is obtained according to the principle of maximum entropy. Then deterministic optimization is carried out, and the translation distance is obtained by using the function function movement method based on the response PDF, and an equivalent deterministic optimization model is constructed and solved to obtain a new optimal solution. Taking the new optimal solution as input, the reliability analysis and deterministic optimization process are repeated until the convergence condition is met, and finally the optimal solution of the original optimization model is obtained. The present invention utilizes the proposed function function movement method based on the response PDF to decouple the reliability analysis from the optimization design and improve the efficiency; the reliability analysis uses the information of the first fourth-order moment of the response to obtain higher precision, It has the dual characteristics of high precision and high efficiency.

Description

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

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Application Information

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Patent Type & Authority Patents(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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