摘要
为了提高汽车白车身有限元焊点的建模效率和易用性,研究了ACM2和CWELD这2种焊点模型的原理、计算精度和易用性。并利用这2种模型模拟焊点分析了白车身的模态、弯扭刚度和动刚度性能,分别与试验结果进行比较。研究结果表明:ACM2和CWELD焊点单元都具有较高的计算精度;ACM2焊点单元比CWELD焊点单元的计算精度更高,且ACM2焊点单元在计算精度上具有更好的稳定性;ACM2单元的易用性更好,工程应用时效率较高,而CWELD单元格式要求更加严格,导致模型调试时间较长,效率较低。通过计算精度和易用性方面的对比研究,为这2种焊点模拟方法在工程上的应用提供参考。
In order to improve the efficienly and facility of finite element spot weld models of automotive BIW（body in white）,this paper studied the principle,accurally and implementation of ACM2 and CWELD models of spot weld.Furthermore,by using the simulation models of spot weld,the natural frequency,the bending and twisting stiffness,and dynamic stiffness of the BIW model were analyzed and compared with the test results.The results show that the ACM2 and CWELD spot weld models are both accurate in simulation,and the ACM2 model is more precise and stable than the CWELD model.The ACM2 models have better ease of use and higher efficiently in engineering application,while the CWELD models have strict format and waste much time in debugging model.By comparing the two spot weld models,this paper provide some reference for the spot weld modeling in engineering application.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第1期134-140,共7页
Journal of Chang’an University(Natural Science Edition)
基金
国家高技术研究发展计划(863计划)项目(2011AA11A218)
广东省战略性新兴产业核心技术攻关项目(2011A010802003)
关键词
汽车工程
焊点
ACM2
CWELD
模态分析
刚度分析
白车身
automotive engineering
spot weld model
ACM2
CWELD
modal analysis
stiffness analysis
body in white
