铝合金薄壁椭圆管替代传统吸能泡沫材料的保险杠吸能结构改进

Improvement of bumper energy absorbing structure of aluminum thin-walled elliptical tube instead of traditional energy absorbing foam

汽车保险杠是汽车中重要的安全装置,吸能泡沫结构作为其缓冲吸能部件,对保护行人小腿有重要作用。为提升乘用车现有保险杠系统的缓冲性能,采用铝合金薄壁管对保险杠原有的吸能泡沫结构进行改进,并分析了铝合金薄壁管的长度和厚度对保险杠保护性能和低速碰撞性能的影响。结果表明:铝合金薄壁管的厚度、长度越大,碰撞过程中能够吸收的能量峰值就越高;经研究改进后的汽车保险杠吸能结构在小腿保护性能、低速碰撞性能上均有显著改善,研究结果对汽车保险杠性能的优化设计有参考意义。

The car bumper is an important safety device on the car.As an energy-absorbing component,energy-absorbing foam plays an important role in protecting pedestrian"s calves.In order to improve the cushioning performance of the existing bumper system of the passenger car,an aluminum thin-walled pipe is used to improve the original energy-absorbing foam structure of the bumper.And the influence of the length and thickness of the thinwalled tube on the bumper protection performance and low-speed collision performance is analyzed.The results show that when the thickness and the length of the thin-walled tube are larger,the peak energy that can be absorbed during the collision is higher.The improved car bumper energy absorption structure has been significantly better in the performance of the lower leg protection and low-speed collision performance.The research results provide an important reference for the optimal design of the performance of automotive bumpers.