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工程设计学报
Chinese Journal of Engineering Design  2015, Vol. 22 Issue (1): 84-88    DOI: 10.3785/j.issn. 1006-754X.2015.01.014
    
Design improvement of vehicle bumper anti-collision beam based on stiffness matching
XIA Lei， JIANG Hao-bin
School of Automotive and Traffic Engineering， Jiangsu University， Zhenjiang 212013， China
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Abstract  In order to improve the ability of energy absorption and economical performance of a vehicle bumper anti-collision beam, an improved design of anti-collision beam was carried out based on the principle of stiffness matching. A finite element simulation platform was built to simulate the 40% offset static pressure test and the simulation method was validated. Considering factors such as design function, manufacturing cost and repairing expense, a reasonable deformation mode of anti-collision beam was proposed, which involved three phases including beam elastic deformation, crash box plastic deformation and beam plastic deformation. Based on the relationship between deformation and stiffness, a stiffness matching mode of anti-collision beam was proposed. Aiming at the unreasonable deformation of the original anti-collision beam, the improvement and validation were performed by adjusting structural and material parameters. Simulation results showed that the total energy absorption of the improved anti-collision beam was higher, which met the requirement of sufficient energy absorption. The reasonable deformation mode of anti-collision beam was realized by meeting the stiffness matching relationship.

Key words： anti-collision beam      static pressure test      finite element simulation      stiffness matching      improvement design     
Received: 04 September 2014      Published: 28 February 2015
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Cite this article:

XIA Lei， JIANG Hao-bin. Design improvement of vehicle bumper anti-collision beam based on stiffness matching. Chinese Journal of Engineering Design, 2015, 22(1): 84-88.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn. 1006-754X.2015.01.014     OR     https://www.zjujournals.com/gcsjxb/Y2015/V22/I1/84


基于刚度匹配的汽车保险杠防撞梁改进设计

为提高某汽车保险杠防撞梁的吸能和经济性，基于刚度匹配原理对其进行改进设计．搭建有限元仿真平台，对40%偏置静压试验进行模拟分析，验证了仿真方法的有效性；考虑设计功效、制造成本与维修费用等因素，提出了包含横梁弹性变形、吸能盒塑性变形和横梁塑性变形三阶段的防撞梁合理变形模式；结合变形与刚度的关系，提出了防撞梁刚度匹配模式；以调整结构及材料参数为途径，针对原防撞梁变形不够合理的缺点进行了改进并验证．结果表明:改进后的防撞梁总吸能更多，达到吸能充分的要求;通过满足刚度匹配关系，实现了防撞梁合理变形模式．

关键词： 防撞梁,  静压试验,  有限元仿真,  刚度匹配,  改进设计 
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