摘要
首先建立某微型车有限元模型,根据FMVSS 216a《乘用车顶抗压强度》法规标准,进行顶部抗压强度试验仿真模拟分析。通过能量变化曲线,验证仿真模型的准确性。通过对汽车车身关键部件(A柱、B柱的上下端、顶盖横梁)进行大量仿真试验,研究其厚度对车顶抗压强度的影响规律。根据正交试验结果分析,得出关键部位的影响大小为B柱上端>A柱下端>前挡风横梁>顶盖横梁>A柱上端>B柱下端;其中起主要关键作用的是B柱的上端部位。对汽车车身关键支撑结构(A柱、B柱、顶盖横梁)进行优化设计,得出最佳优化方案,提高车顶抗压强度与安全裕度。
Firstly, the finite element model of a certain car is builded, and then according to the regnlations and standards of FMVSS 216a＇s ＂top compressive strength of passenger car＂, the test simulation analysis for ceiling compressive strength is presented. By comparing the energy curve, the accuracy of the simulation model is verified. A large number af simulation experiments on key parts of car body, such as, the upper and lower ends of the A-pillar,B-pillar and roof beam, are conducted in it. The goal is to do the research on the relationship between the thicknesses af these key parts and the compressive strength of the roof. According to the result of orthogonal experiment analysis, it is concluded that the influence of the key parts is Upper or B-pillar〉Lower of A-pillar〉Beam before the wind〉Roaf beam〉Upper of A-pillar〉Lower of B-pillar; Which play a major role in key parts is the B-pillar side.The optimization for key parts of car body is achieved, obtaining the best optimization program,so that compressive strength and safety margin af the roaf are improved.
出处
《机械设计与制造》
北大核心
2017年第8期106-109,共4页
Machinery Design & Manufacture
基金
校企合作基金项目资助(S-C08-01W10-904-010-OR19)
