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汽车安全与节能学报

汽车安全与节能学报 ›› 2012, Vol. 3 ›› Issue (1): 38-43.DOI: 10.3969/j.issn.1674-8484.2012.01.006

• 汽车安全 • 上一篇    下一篇

胶接、点焊和胶焊连接方式的前纵梁耐撞性分析

陈更1，陈君毅1，2，王宏雁1，2，王华锋2   

  1. 1. 同济大学　中德学院，上海 200092 ； 2. 同济大学　汽车学院，上海 201804
  • 收稿日期:2011-07-05 出版日期:2012-03-25 发布日期:2012-03-28
  • 通讯作者: 王宏雁，教授。E-mail ：why-sos@vip.sina.com E-mail:chengeng_2006@yahoo.com.cn
  • 作者简介:陈更（1986—），女（汉），天津，硕士研究生。E-mail ：chengeng_2006@yahoo.com.cn
  • 基金资助:

    国家自然科学基金(50975208)

Crashworthinessanalysis of spot-welded, adhesively bonded and bonded-welded front longitudinal beams

CHEN Geng1, CHEN Junyi1，2, WANG Hongyan1，2, WANG Huafeng2   

  1. 1. Sino German College, Tongji University, Shanghai 200092, China;
    2. School of Automotive Studies, Tongji University, Shanghai 201804, China
  • Received:2011-07-05 Online:2012-03-25 Published:2012-03-28

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摘要： 胶接工艺在车身上的应用，有利于车身轻量化。该文对比、分析了点焊、胶接、胶焊三种
连接方式下前纵梁的耐撞性。根据汽车前纵梁耐撞性一般要求，及耐撞性评价指标，利用某实车前
纵梁的有限元模型，对比三种连接方式下、不同碰撞速度下、在碰撞载荷作用下的变形，探讨点焊、
胶接和胶焊连接对于结构耐撞性的影响。结果表明：在低速（3.3 m/s）碰撞时，胶接的纵向等效刚度
较点焊连接大；在高速（13.2 m/s）碰撞时，胶接的纵向等效刚度较点焊连接小；在连接小范围失效的
前提下，连接方式对于前纵梁耐撞性能的影响较小。

关键词: 汽车安全, 前纵梁, 耐撞性, 胶接, 胶焊

Abstract: Adhesively bonded technology process applied in a car body is useful to make the car body lighter.
This paper contrasts and analyzes the crashworthiness of the front longitudinal beam of a real car under crash
loading for three connection models of spot-welded, adhesively bonded and bonded-welded styles using a finite
element model to meet the crashworthiness normal requirements and evaluating indicators for front longitudinal
beams. The deformations were calculated under different crash velocities. The results show that the longitudinal
direction equivalent stiffness of adhesive connection is higher than that of spot weld in low-speed (3.3 m/s)
collision and lower in high-speed (13.2 m/s) collision. Connection modes have very little influence on the
performance of the front longitudinal beams when connection loses efficacy in small scope.

Key words: automotive safety, front longitudinal beam, crashworthiness, adhesively bonded, bonded-welded

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