薄壁管结构的耐撞性研究  

Study on the Crashworthiness of Thin-Walled Tube Structures

作　　者：柳忠彬[1,2] 李玉如[1] 肖守讷[2] 王欢[1] 

机构地区：[1]四川理工学院机械工程学院,四川自贡643000 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《机械设计与制造》2015年第8期46-49,共4页Machinery Design & Manufacture

基　　金：中央高校基本科研业务费专项基金资助项目(SWJTU09ZT23);牵引动力国家重点实验室自主课题(2014TPL_T04)

摘　　要：通过非线性有限元软件ANSYS/LS-DYNA对异截面同厚度和同截面异厚度的薄壁结构进行了数值分析,研究了其截面形状、壁厚、诱导槽等对撞击性能的影响,得出了薄壁管结构的吸能特征。分析表明:(1)锯齿管与圆形管具有相近的吸能效果,可以作为一种新型的薄壁管吸能元件;(2)横截面形状对薄壁管的比吸能有很大的影响,圆形管比吸能效果最好;(3)薄壁管的吸能随厚度增加而提高,但撞击力峰值与撞击力均值也会随之增加,达到4mm时吸能不再提高;(4)预变形结构能够使薄壁管的比吸能减少极小的情况下大幅降低撞击力峰值与撞击力均值,能有效地避免对乘客带来二次伤害,极大地提高了机车的耐碰撞性能。By means of nonlinearfinite element software ANSYS/LS-DYNA, the numerical analysis of two kinds of thinwalled structure （which own different cross-section and the thickness of the same, own different thickness and the crosssectional thickness of the same） is done. The effects of the cross-sectional shape, thickness and induction ducts on impact performance are studied, and the＇energy absorption characteristics of thin-walled tube structure are obtained. （1）the energyabsorbing effect of zigzag tube is close to the circular tube and the zigzag tube can be used as a new type of thin-walled tube absorbing element. （2）Specific energy absorption of the thin-walled tubes affected by the cross-sectional shape a lot. And the circular tube specific energy absorption is the best. （3）The energy absorption of thinly walled tube increases with the increase of its thickness, and attains its maximum when the thickness of thinly walled tube is 4mm. but the peak impact force and impact force mean value will also increase. （4）The pre-deformed structure enables the peak impact force and impact force mean value significantly reduces, and the same time makes its energy absorption significantly reduce little, which can effectively avoid secondary damage to the passenger, and greatly improves the resistance of the locomotive crash performance.

关 键 词：非线性 数值分析 薄壁管结构 比吸能 撞击力 耐碰撞 

分 类 号：TH16[机械工程—机械制造及自动化] U260.2[机械工程—车辆工程]