简易台架和道路试验相结合的车身钣金开裂优化方法研究

Research on Optimization Method for Vehicle Body Sheet Metal Cracking by Combining Simple Bench Test and Road Durability Test

主要介绍了一种结合Miner原理,使用简易台架试验对车身钣金耐久开裂问题整改方案的有效性进行快速验证,并结合道路耐久试验完成验证闭环的优化方法。首先,对某车型在强化耐久试验中出现的车身钣金开裂问题进行复现,确认钣金开裂的原因并制定整改方案;然后通过CAE仿真分析设计一种简易台架试验,在使用该台架试验准确复现钣金开裂问题后,即可对整改方案的有效性进行快速验证;最后经过实车强化耐久试验验证,整改后的钣金未出现开裂问题,证明了该方法的准确性和有效性。

This article mainly introduces a fast verification of the effectiveness of the optimization scheme for durability cracking of body sheet metal using a simple bench test combined with Miner principle,and then verifies it through vehicle durability testing to form a close-loop optimization method.First,reproduce the problem of body sheet metal cracking in vehicle enhanced durability testing using CAE analysis method.Then,confirm the cause of body sheet metal durability cracking and make optimization scheme.Next,through CAE simulation analysis,design a simple bench test.Through this simple bench test,it is necessary to accurately reproduce the durability cracking problem of body sheet metal,then quickly verify the effectiveness of the optimization scheme.Finally,after verification through vehicle durability testing,the body sheet metal with added optimization scheme did not show any durability cracking problem,which proves the accuracy and effectiveness of this method.