汽车侧面碰撞有限元仿真建模  

Finite element modeling of vehicle side crash

作　　者：游国忠[1] 陈晓东[1] 程勇[2] 朱西产[2] 苏清祖[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]中国汽车技术研究中心,天津300162

出　　处：《江苏大学学报（自然科学版）》2005年第6期484-487,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省高校自然科学研究计划项目(03KJB580024);江苏大学高级专业人才科研启动基金资助项目(04JDG003)

摘　　要：整车碰撞仿真是汽车被动安全性研究的关键技术和有效方法.应用美国ETA/VPG及LS-DYNA软件,按照欧洲侧面碰撞法规ECER95,对国产某轿车汽车侧面碰撞车身抗撞性能进行了计算机仿真分析.文中介绍了整车有限元建模及侧面碰撞仿真的方法及经验,分析了材料与焊点的模拟方式、时间步长、刚体、自接触的定义等对计算结果有影响的建模因素,并将模拟计算结果与实际碰撞结果进行对比.通过仿真和试验结果的比较,车身变形、加速度波形以及车体的运动基本一致,从而验证了文中汽车侧面碰撞仿真的建模方法,为进一步研究侧面碰撞人体伤害以及车身侧面抗撞性能的改进奠定了基础.Crash simulation of full car is a pivotal and effective method to study vehicle passive safety. According to European side crash regulation, ECER95, the side crash property of a native car is analyzed by USA ETA/VPG and LS-DYNA softwares. The modeling and simulation of full car and full-scale side crash are introduced in detail. The crucial aspects related to the accuracy of the result, such as the simulation of materials and spot welds, the time control, rigid body, and the definition of contact interface are discussed. The comparing results between simulation and full-scale test indicated that the deformation, acceleration and motion of vehicle body are consistent. The modeling method of vehicle side crash is validated.

关 键 词：汽车 侧面碰撞 建模 有限元仿真 

分 类 号：U46[机械工程—车辆工程]