汽车车身偏置碰撞抗撞性分析与结构改进  

Simulation of Crashworthiness and Structure Improvement of Automotive Body in Offset Impact

作　　者：鄢回洪[1] 辛勇[1] 

机构地区：[1]南昌大学机电工程学院,南昌330031

出　　处：《机械科学与技术》2013年第6期829-833,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50645032);江西省科技攻关计划项目(C0202400)资助

摘　　要：针对某乘用车在偏置碰撞形式下的安全性问题,对车身前部关键部件进行改进,实现汽车前舱刚度匹配,使整体结构合理变形。通过对仿真结果的分析并针对原车耐撞性能的不足,在车身纵梁前部设计导引槽式吸能结构,以改进前纵梁吸能变形模式;增加A柱加强件的厚度,以提高车架纵向刚度和乘员舱的强度。仿真结果表明:在整车质量仅增加2.24 kg的情况下,改进方案有效地提高了整车的耐撞性,整车的加速度峰值降低了6 g,乘员舱的变形量有所减小。In order to solve the safety problem happened in a car offset impact test, vehicle front key structure were improved to achieve the stiffnessmatching of vehicle front parts and reasonable deformation of the whole structure. According to the simulation results and the deficiency of original car crashworthiness, energyabsorbing guidance slot was designed in front parts to improve energyabsorbing deformation, and the thickness of a pillar strengthen pieces was increased to improve the longitudinal stiffness and the crew cabin frame strength. The simulation results show that the peak acceleration of automobile reduces by 6 g, the deformation of cabin was reduced with a mass in creasing by only 2.24 kg, and the whole vehicle crashworthiness was improved effectively.

关 键 词：偏置碰撞 刚度匹配 吸能 前纵梁 

分 类 号：U461.91[机械工程—车辆工程]