Robust automobile body material matching method based on multi-objective continuous orthogonal method

Abstract

The invention discloses a robust automobile body material matching method based on a multi-objective continuous orthogonal method. The method mainly comprises the following steps: creating a collision finite element model through actual collision states and conditions; and then, determining an optimization target, constraint conditions and design variables to be optimized, and creating a three-level orthogonal table; obtaining target response values through numerical simulation calculation, calculating target signal to noise ratios and obtaining correction response values; and finally, reasonably selecting an optimal solution through the determined comprehensive evaluation value, judging the designed target satisfies an iteration judging condition, if not, using the current optimal solution as the initial solution of the next iteration step until the iteration judging condition is satisfied. According to the invention, automobile body design can be further guided reasonably, and the automobile safety performance and lightweight design level are improved.

Description

technical field [0001] The invention mainly relates to the fields of lightweight and safety of automobile bodies, in particular to a robust automobile body material matching method based on a multi-objective continuous orthogonal method. Background technique [0002] With the development of the automobile industry, the automobile industry has higher and higher requirements for lightweight and safety. At the same time, automobile lightweight, as an important way to save energy and reduce emissions, has also been highly valued by countries all over the world. In the process of automobile lightweight, the automobile body accounts for about 30%-60% of the total weight of the vehicle, and about 70% of the fuel is consumed in the body mass during the operation of the automobile. Therefore, the weight reduction of the automobile body is the most important aspect of automobile lightweight one of the ways. For the weight reduction of the car body, various methods such as lightweigh...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor accuracy of the traditional material replacement method, ignoring the interactive influence between components, too many times of calling the positive problem of the genetic algorithm, and low precision of the proxy model method.

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