后防护横梁壁厚和吸能的关系研究及仿真  

Study and Simulation of Relationship Between Wall Thickness and Energy Absorption of Rear Protection Beam

作　　者：叶新娜[1] 梅丽歌[1] 袁洪川 

机构地区：[1]河南交通职业技术学院,河南郑州450000 [2]河南森源鸿马电动汽车有限公司,河南郑州450000

出　　处：《湖南工业职业技术学院学报》2015年第2期1-3,共3页Journal of Hunan Industry Polytechnic

摘　　要：在发生货车被追尾碰撞时,为了达到保护后车和车上乘员的目的,必须在后防护装置的有限许可范围内,应尽可能提高碰撞发生瞬间后防护横梁和斜支撑构件的弹塑性变形所吸收的能量。本文利用LS-DYNA仿真软件对圆形横截面横梁壁厚分别为6mm、6.5mm和7mm时其缓冲吸能性进行对比分析。通过动态仿真不同壁厚的圆形横截面后防护横梁在碰撞过程中的变形、碰撞减速度以及吸能情况,表明当后防护横梁取圆形横截面时,壁厚值越小其缓冲性能最好,吸收内能最大。In the event of a collision, in order to protect the vehicle and the passengers in the after car, protection beam and diagonal brace should as far as possible increase energy absorption at the collision moment. In this paper, by using the LS-DYNA software,the energy absorption of circular cross section beam is analysed,whose wall thickness are respectively 6mm, 6.5mm and7 mm. Through the dynamic simulation of deformation,impact deceleration and energy absorbing, showed that when the rear protection beam taking a circular cross section, the smaller the thickness of buffer performance is the best, the maximum absorption.

关 键 词：不同壁厚 后防护横梁 吸能 仿真 

分 类 号：U463.326[机械工程—车辆工程]