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汽车安全与节能学报

JASE ›› 2017, Vol. 08 ›› Issue (01): 53-58.DOI: 10.3969/j.issn.1674-8484.2017.01.006

• 汽车安全 • 上一篇    下一篇

小重叠正面斜角碰撞工况对车体耐撞性的影响

牛卫中1，许鹏善1，刘金鑫2   

  1. 1. 兰州交通大学 机电工程学院，兰州 730070 ；2. 日立永济电气设备有限公司，西安 710000
  • 收稿日期:2016-10-25 出版日期:2017-03-23 发布日期:2017-03-23
  • 作者简介:第一作者 / First author ： 牛卫中（1962—），男（汉），甘肃，教授，Email: nwz@mail.lzjtu.cn。 第二作者 / Second author ： 许鹏善（1989—），男（汉），甘肃，硕士研究生，Email: 840585778@qq.com。

Influence of small overlap frontal oblique impact conditions on crashworthiness of car body

NIU Weizhong1, XU Pengshan1, LIU Jinxin2   

  1. 1. School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2. Hitachi Yongji Electric Equipment Co. Ltd., Xi'an 710000, China
  • Received:2016-10-25 Online:2017-03-23 Published:2017-03-23

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摘要：

为了评价乘用汽车在小重叠正面斜角碰撞事故中的耐撞性，应用HyperWorks 和LS-DYNA软件建立了两辆同款运动型多功能车(SUV) 发生正面碰撞时的有限元模型。通过对数种25%重叠率碰撞工况的仿真计算，依据B 柱下端最大加速度、A 柱上部最大折弯角、前围板侵入量3 项重要评价指标，分析了碰撞角度与速度对两辆车体耐撞性的影响。结果表明：该款车型在0°~ 45°小重叠率正面斜角碰撞中，耐撞性最差的工况出现于作为被突入车与突入车成0°~ 15° 角发生高速碰撞时，其耐撞性会随着两车相对碰撞速度的提高而迅速变差。因此，可选择这种工况对该款车型的车体结构进行有针对性的优化设计。

关键词: 汽车安全性, 车体耐撞性, 车与车碰撞, 小重叠正面斜角碰撞, 有限元仿真

Abstract:

A finite element model of two colliding sports utility vehicle (SUV) cars of same type was developed to evaluate the crashworthiness of passenger car in small overlap frontal oblique impact accident by using HyperWorks and LS-DYNA software. Through simulating several impact conditions of 25% overlap, the influences of collision angle and velocity on the crashworthiness of two car bodies were analyzed in terms of three important evaluation indexes i.e. maximum acceleration at the bottom of B-pillar, maximum bending angle on the upper part of A-pillar and dash panel intrusion. The results show as follows: In a 0° ~ 45° small overlap
frontal oblique impact, this type of car had its worst crashworthiness when it was collided as an inserted highspeed car by an inserting high-speed car at 0° ~ 15°; and with the increase of relative collision velocity of two cars, its crashworthiness deteriorated sharply. So the condition can be chosen for the pointed optimizing design to the car body.