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汽车安全与节能学报 ›› 2010, Vol. 1 ›› Issue (4): 327-331.DOI: 10.3969/j.issn.1674-8484.2010.04.012

• • 上一篇    

前纵梁碰撞模拟中的焊点建模方法比较

蒋小晴1,杨济匡*1,肖 志1,叶映台1,郭 杰1   

  1. 1. 湖南大学 汽车车身先进设计制造国家重点实验室,长沙 410082 :
    2. 奇瑞汽车股份有限公司 工程研究院,芜湖 241009
  • 收稿日期:2010-11-19 出版日期:2010-12-20 发布日期:2010-12-20
  • 通讯作者: 杨济匡,博士生导师。E-mail : jikuangyang@hnu.cn
  • 作者简介:蒋小晴(1983 -),男(汉),湖南,博士研究生。E-mail :jxqhao123@126.com
  • 基金资助:

    国家“八六三”高技术研究发展项目(2006AA110101);教育部“111 计划”(111-2-11)

Methods comparison of spotweld models in longitudinal beam#br# crash

JIANG Xiaoqing 1, YANG Jikuang* 1, XIAO Zhi 1, YE Yingtai 1, GUO Jie 2   

  1. 1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha
    410082, China;
    2. Automobile Engineering Research Institute, Chery Automobile Co. Ltd, Wuhu 241009, China
  • Received:2010-11-19 Online:2010-12-20 Published:2010-12-20
  • Contact: *通讯作者/ Corresponding author: 杨济匡,博士生导师。E-mail: jikuangyang@hnu.cn
  • About author:蒋小晴(1983 -),男(汉),湖南,博士研究生。E-mail :jxqhao123@126.com
  • Supported by:

    国家“八六三”高技术研究发展项目(2006AA110101);教育部“111计划”(111-2-11)

摘要: 研究了汽车前纵梁碰撞有限元分析中焊点的5 种建模方式对仿真精度的影响。这5 种焊点建模方法:刚性
化节点模型、无质量刚性杆模型、可变形梁单元模型、实体单元模型和弹簧单元模型。在Ls-Dyna 通用非线性动力
学软件平台上,建立对应的焊点模型,根据某前纵梁台车碰撞实验,对比分析这5 种方法在模拟焊点失效响应、前
纵梁的动态响应、建模的难度,点焊模拟连接、载荷力的优点和不足。结果表明: 能否模拟失效对仿真精度有较大
影响,在前纵梁碰撞模拟计算中模拟精度较高的焊点模型依次为:实体单元模型、可变形梁单元模型和弹簧单元模型。

关键词:  汽车碰撞, 焊点建模, 焊点失效, 仿真精度

Abstract:  A corresponding crash finite element (FE) model was developed to study the influence of spotweld models in
longitudinal beam crash and the simulation accuracy. The model uses the Ls-Dyna software with five types of spotweld models,
including the rigid bar, spotweld, beam, spring, and solid element models, in the crash of a certain longitudinal beam jointed by
spotwelds. With a real world test comparison, this paper analyzes the failure of spotweld, the deformation of longitudinal beam,
the difficulty of modeling, and the advantages and disadvantages of modeling the connecting and loading. The results show that
the failure of spotwelds affects the carsh simulation precision, and that the solid element model, deformable beam model and
spring model have higher simulation precision.

Key words: car crash, spotweld model, spotweld failure, simulation accuracy

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