摘要
总结了几种当前常用的焊点模拟方法,针对汽车碰撞有限元模拟中所使用的点焊连接模型存在的建模效率及模拟精度等方面的问题,提出使用实体单元集合对焊点进行模拟,并通过薄壁梁碰撞试验,建立了实体单元集合及Beam单元有限元模型,并系统对比分析了其模拟精度,结果认为使用HEX8实体焊点模拟方法对焊点的模拟是最为准确的。通过部件试验确定了焊点失效参数,将实体焊点HEX8模拟方法应用于整车耐撞性仿真分析中,得到了较为精确的仿真结果。实车试验证明,该新型焊点模型具有较高的精度及较强的工程实用性。
Several commonly used methods of spot weld simulation were summarized and a new solid spot weld elements model was proposed,according to the efficiency and simulation accuracy of the spot weld elements in vehicle crash model.Spot weld elements using solid element assemblies and beam elements were built in detail and their accuracy was systematically compared,based on the crash tests of thin-walled rail.And the most accurate results were gained by using HEX8 elements.The whole car simulation analysis of crashworthiness using spot weld failure parameters obtained by specimen test and the new HEX 8 elements model gave more accurate results.The vehicle tests demonstrated that this solid elements assemblies spot weld model has higher precision and stronger project practicability.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2011年第10期1226-1231,共6页
China Mechanical Engineering
基金
教育部长江学者和创新团队发展计划资助项目(531105050037)
湖南大学汽车车身先进设计制造国家重点实验室自主课题资助项目(60870002)
上海市数字化汽车车身工程重点实验室开放课题基金资助项目(2010-02)
关键词
焊点
实体单元
碰撞
部件试验
失效
spot weld
solid element assembly
crashworthiness
specimen test
failure
