噪声与振动控制Issue(6)：102-106,5.DOI:10.3969/j.issn.1006-1335.2014.06.023
汽车缓冲吸能式保险杠碰撞能量衰变特性研究
Study on Collision Energy Decay Characteristic of Energy-absorbing Bumper for Car Crash
摘要
Abstract
For energy-absorbing bumpers of automotive turning impact kinetic energy into multiple impact condition in an instant and realizing the purpose of multiple point synchronous or asynchronous absorption, the Hypermesh software was used to establish a finite element model for the energy absorbing bumper, and the ANSYS/Ls-Dyna solver was simulated for the crash analysis of maximum stress of the bumper and energy absorption characteristics of energy absorbing cushion de-vice and the characteristics of collision energy decay curves at different velocity as 10 km/h, 20 km/h, 30 km/h, 40 km/h and 50 km/h. The simulation results show that the energy-absorbing box of grooves and beams was suffered the greatest stress, and the beam stress was concentrated to the center distribution rule when the bumper was crashing, and when the stress con-centration increased a certain extent, the beam started bent in the center. With the increase of the impact energy, the energy absorption ratio of the energy absorbing device increased at first and then decreased. In the process of collision, the way of collision energy decay was the linear attenuation, along with the increase of the impact velocity, the slope of the collision en-ergy decay curve increased sharply.关键词
振动与波/保险杠/碰撞/仿真分析/能量衰变Key words
vibration and wave/bumper/collision/simulation analysis/energy decay分类
交通工程引用本文复制引用
赵树恩,林繁国,李玉玲..汽车缓冲吸能式保险杠碰撞能量衰变特性研究[J].噪声与振动控制,2014,(6):102-106,5.基金项目
重庆市科委自然科学基金重点项目(cstc2013jj B60001)；陕西省科技厅科研项目(2014JM7291) （cstc2013jj B60001）
