某车型内高压成形吸能盒碰撞性能数值仿真研究  

Numerical simulation study on crash performance of high-pressure forming energy absorbing box in a certain model

作　　者：刘宁 李欢 冯竞慧 刘阳[1] LIU Ning;LI Huan;FENG Jinghui;LIU Yang(Academy for Electromechanical,Changchun Polytechnic,Changchun 130022,China;FAW Besturn Car Co.,Ltd.,Changchun 130011,China)

机构地区：[1]长春职业技术学院机电学院,长春130022 [2]一汽奔腾轿车有限公司,长春130011

出　　处：《现代制造工程》2023年第12期76-83,共8页Modern Manufacturing Engineering

基　　金：2023年度吉林省高校优秀青年科研创新人才储备库项目;2022年吉林省高教科研重点课题项目(JGJX2022B62);长春市教育科学“十四五”2022年度规划课题项目(JKBLX2022007);2022年吉林省高教科研一般课题项目(JGJX2022D714)。

摘　　要：汽车吸能盒作为保险杠内的一个重要吸能部件,在碰撞中可以起到吸收碰撞能量、保护纵梁和降低维修成本的作用,对提高整车的耐撞性具有积极作用。以某车型轿车前保险杠吸能盒为研究对象,将原有冲压焊接结构优化为内高压成形结构。运用Hypermesh、LS-Dyna软件分别对2种结构吸能盒的吸能特性进行碰撞数值仿真,应用Autoform软件对内高压成形结构吸能盒进行内高压成形数值仿真;针对吸能盒实物进行了成形、碰撞试验,最后将碰撞数值仿真结果、内高压成形数值仿真结果与试验值进行了对比。结果表明:内高压成形结构吸能盒在轻量化、成本和产品性能3个方面均优于冲压焊接结构吸能盒,碰撞数值仿真和内高压成形数值仿真对产品性能和工艺开发及优化均有较大的指导意义,该研究方法为汽车吸能元件设计提供了一种新的思路。As an important energy-absorbing component in the bumper,the automobile energy-absorbing box can absorb collision energy,protect longitudinal beams and reduce maintenance costs during a collision,and has a positive effect on improving the crashworthiness of the entire vehicle.Taking the energy-absorbing box of the front bumper of a certain car model as the research object,the original stamping and welding structure was optimized into an internal high-pressure forming structure.Hypermesh and LS-Dyna software were used to conduct collision numerical simulations on the energy-absorbing characteristics of the two structural energy-absorbing boxes.Autoform software was used to conduct internal high-pressure forming numerical simulations of the internal high-pressure forming of the energy-absorbing boxes.Forming and collision tests were conducted on the actual energyabsorbing boxes.Finally,the collision numerical simulation results,internal high-pressure forming numerical simulation results and experimental values were compared.The results show that the internal high-pressure forming structure energy-absorbing box is superior to the stamping and welding structure energy-absorbing box in three aspects cncluding lightweight,cost and product performance.Both collision numerical simulation and internal high-pressure forming numerical simulation have important effects on product performance and process development and optimization.With great guiding significance,this research method provides a new idea for the design of automotive energy-absorbing components.

关 键 词：吸能盒 内高压成形 数值仿真 碰撞性能 落锤试验 

分 类 号：U462.3[机械工程—车辆工程]