Bull-horn-imitation car door anti-collision beam based on negative poisson ratio structure and optimization method thereof

Abstract

The invention discloses a bull-horn-imitation car door anti-collision beam based on a negative poisson ratio structure and an optimization method thereof. The bull-horn-imitation car door anti-collision beam takes a bull horn as a bionic object and comprises a bull-horn-imitation shell, a bone core, a front mounting bracket and a rear mounting bracket. The bull-horn-imitation shell is a hollow round tube; the bone core is formed by two-dimensional four-angle star-shaped negative poisson ratio single cell arrays; the bone core and the inner wall of the bull-horn-imitation shell are flexibly connected; and the two ends of the bull-horn-imitation shell are rigidly connected with an arced pipeline of the front mounting bracket and an arced pipeline of the rear mounting bracket correspondingly. In optimizing, an experimental optimization method (DOE), simulation calculation, establishment of an agent model and multi-objective optimization are sequentially conducted, all characteristic parameter values of the bull-horn-imitation car door anti-collision beam structure are determined, the collision prevention performance and collision resistance are improved, and the lightweight effect is achieved while injury to persons in a car is reduced.

Description

technical field [0001] The invention relates to the field of automobile passive safety, in particular to an anti-collision beam of an automobile door imitating horns based on a negative Poisson's ratio structure and an optimization method thereof. Background technique [0002] In recent years, the safety design of side collision is an important part in the field of automobile passive safety. In order to reduce the injuries of occupants in side collisions, it is necessary to improve the crashworthiness of the side of the car. In modern car design, in addition to increasing the strength of the car door, most of them increase the crashworthiness of the side of the car by adding anti-collision beams, but the above-mentioned method has the following shortcomings: [0003] 1. Anti-collision beams using new materials can meet certain crashworthiness and light weight, but the manufacturing cost is high, and the recycling of materials is difficult, which cannot meet the requirements...

AI Technical Summary

Problems solved by technology

[0003] 1. Anti-collision beams using new materials can meet certain crashworthiness and light weight, but the manufacturing cost is high, and the recycling of materials is difficult, which cannot meet the requirements of environmental protection;

[0004] 2. The material of the anti-collision beam is generally medium and high-strength steel with high yield strength and good crashworthiness, but its weight is high, which cannot meet the requirements of lightweight

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