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汽车安全与节能学报

汽车安全与节能学报 ›› 2011, Vol. 2 ›› Issue (4): 317-322.DOI: 10.3969/j.issn.1674-8484.2011.04.005

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基于正面力传递路径的轿车车身结构耐撞性

刘钊，朱平，喻明，卢家海   

  1. 上海交通大学　上海市数字化汽车车身工程重点实验室，上海，200240
  • 收稿日期:2011-10-10 出版日期:2011-12-26 发布日期:2011-12-26
  • 通讯作者: 朱平，教授。E-mail ：pzhu@sjtu.edu.cn
  • 作者简介:刘钊（1988—），男（汉），山东，硕士研究生。E-mail ：kakalz@163.com

Passenger car-body crashworthiness based on the force transmission path of frontal impact

LIU Zhao, ZHU Ping, YU Ming, LU Jiahai   

  1. Shanghai Jiao Tong University, Shanghai Key Laboratory of Digital Auto Body Engineering, Shanghai 200240, China
  • Received:2011-10-10 Online:2011-12-26 Published:2011-12-26
  • Contact: 朱平，教授。E-mail ：pzhu@sjtu.edu.cn
  • About author:刘钊（1988—），男（汉），山东，硕士研究生。E-mail ：kakalz@163.com

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摘要： 为了提高整车安全性，研究了某轿车车身结构耐撞性。分析了整车正面碰撞过程中碰撞力传
递路径，利用HyperWorks 软件，建立整车有限元模型，对车身结构关键零件（前纵梁、保险杠横梁
和冲撞盒）进行改进设计。利用LS-DYNA 软件，根据中国新车评价规程(CNCAP) 碰撞安全法规，进行
了100% 刚性壁（RGB）正面碰撞和40% 偏置可变形壁障(ODB) 偏置碰撞的数值仿真。结果表明：车身
结构改进后，两种碰撞的前围板侵入量明显降低；两侧B 柱加速度均减少；碰撞吸能增加（对100%
RGB，增加 9.8 kJ ；对40% ODB ，增加3.3 kJ）。

关键词:  汽车安全, 结构耐碰撞性, 力传递路径

Abstract: Structural crashworthiness was investigated for a passenger car-body to improve vehicle safety. The
auto-body structure was analyzed based on the force transmission path of frontal impact, with the auto-body
finite element model being built using the HyperWorks program and some key parts being improved including
the front side rail, front cross rail and crash box for a passenger car-body structure. Two front impacts were
numerically simulated using LS-DYNA program according to the crash regulation by China New Car Assessment
Program, CNCAP, in which one is full front impact with rigid barrier (RGB) and the other is 40% offset front
impact with offset deformable barrier (ODB). The results show that owing to car-body structure improvements,
the intrusion capacities obviously decrease with accelerations of both the left and right “B” pillars decreasing in
the two front impacts, and with increased impact energy absorption of 9.8 kJ for the 100% RGB and 3.3 kJ for
the 40% ODB.

Key words: vehicle safety, structural crashworthiness, force transmission path, passenger car-body, finite element method (FEM), offset deformable barrier (ODB)

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