吸能盒式前防撞横梁系统的碰撞吸能特性研究  

RESEARCH ON THE COLLISION ENERGY ABSORPTION CHARACTERISTICS OF THE ENERGY-ABSORBING BOX FRONT ANTICOLLISION BEAM SYSTEM

作　　者：李洪涛[1] 张佳琦 宋庆松 纪运广[1] 王楠 LI HongTao;ZHANG JiaQi;SONG QingSong;JI YunGuang;WANG Nan(School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学机械工程学院,石家庄050018

出　　处：《机械强度》2024年第6期1338-1345,共8页Journal of Mechanical Strength

基　　金：河北省高等学校科学技术研究重点项目(ZD2020115)资助。

摘　　要：前防撞横梁系统是提高整车安全性的重要部件,其中,吸能盒和横梁的结构参数直接影响车体的耐撞性能。为得到吸能盒式前防撞横梁系统的优化方案,首先,从压溃形式、初始峰值力和比吸能3个角度,研究了吸能盒截面结构对耐撞性能影响;然后,从抗弯强度和吸能值两个维度,研究了横梁截面结构对耐撞性能的影响;最后,研究了正碰和偏碰情形下,优化后吸能盒式前防撞横梁系统的耐撞性能。研究结果表明,正六边形截面具有较好的吸能效果;“目”字形截面横梁抗弯强度高且吸能效果好;新型吸能盒式前防撞横梁系统相较于传统系统而言,在正碰和偏碰情形下,吸能值分别提高了11.5%和31.6%,侵入量分别降低了53.2%和38.4%。这为优化防撞梁系统安全性能的研究提供了支持。The front anti-collision beam system is an important component to improve the safety of the whole vehicle.Among them,the structural parameters of the energy-absorbing box and the beam directly affect the crash resistance of the vehicle body.In order to obtain the optimization scheme of the energy-absorbing box-type front anti-collision beam system,firstly,from the three perspectives of crushing form,initial peak force and specific energy absorption,the impact of the cross-section structure of the energy-absorbing box on the crash-worthiness performance was studied.Then,the impact of the cross-section structure of the beam on the crash-worthiness performance was studied from the two dimensions of bending strength and energy absorption value.Finally,the crash-worthiness performance of the optimized energy-absorbing box-type front anti-collision beam system in the case of frontal collision and partial collision was studied.The results show that,the regular hexagonal section has a good energy absorption effect;the tripple channel beam has high flexural strength and good energy absorption effect;the new energy-absorbing box-type front anti-collision beam system compared to traditional systems,in the case of frontal collision and partial collision,the energy absorption values increase respectively by 11.5% and 31.6%,and the intrusion amount decreases respectively by 53.2% and 16.1%.The support for the research on the safety performance of the optimized anti-collision beam system is provided.

关 键 词：汽车工程 防撞梁 吸能盒 碰撞安全 

分 类 号：TH16[机械工程—机械制造及自动化] U463[机械工程—车辆工程]