汽车整车结构侧面耐撞性有限元数值模拟  

FEM Numerical Simulation of Side Crashworthiness for Vehicle Structure

作　　者：郑何妍 卢耀辉[1] 赵智堂 张德文[1] 

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《装备环境工程》2017年第12期45-50,共6页Equipment Environmental Engineering

基　　金：国家自然科学基金(51275428);西南交通大学科研训练国创项目(201610613033)

摘　　要：目的研究汽车结构侧面主要承载部件的耐撞性,参考我国碰撞法规和ECE R95,根据国内某SUV汽车的参数和相关标准建立整车有限元模型和移动可变形壁障模型(MDB),对其进行数值模拟,为结构的优化设计提供参考。方法利用Hyper Mesh前处理将CAD模型转化为CAE有限元模型,输出k文件,并通过LS-DYNA大变形有限元仿真软件对其耐撞性进行计算。结果仿真结果显示,在汽车侧面碰撞过程中,B柱和车门等主要承载部件发生了较大的变形,B柱变形量为116.6 mm,车门的变形量为190 mm,其值符合标准要求,在碰撞结束后保证了足够的乘员空间。结论该车有较好的侧面耐撞性,且得出的碰撞数值模拟结果可为该车的结构设计提供参考。Objective To study the crashworthiness of the main bearing parts on the side of the car structure, establishfinite element model of the vehicle and the moving deformable barrier model （MDB） according to parameters and relatedstandards of a domestic SUV by referring to ChinaTs collision regulation and ECE R95. Methods The HjrperMesh preprocessingwas used to convert the CAD model into CAE finite element model to output the k file, and put it in LS-DYNA（large deformation finite element simulation software） to calculate side crashworthiness of the vehicle. Result The mainbearing parts such as the B-pillar and the door had large deformation in vehicle side impact. The deformation of theB-pillar was 116.6mm, and the deformation of the door was 190mm. It was in line with the requirement of China＇s regulationsand ensured sufficient occupant space after impact. Conclusion The vehicle has better side crashworthiness, andthe numerical simulation results can provide a reference for the structural design of the vehicle.

关 键 词：侧面碰撞 大变形数值模拟 移动变形壁障 B柱 

分 类 号：TJ07[兵器科学与技术—兵器发射理论与技术] U462.3[机械工程—车辆工程]