截面几何参数对帽型梁轴向冲击响应的影响

田泽 韩阳 尹晓文 辛浩 赵隆茂 李志强

田泽, 韩阳, 尹晓文, 辛浩, 赵隆茂, 李志强. 截面几何参数对帽型梁轴向冲击响应的影响[J]. 高压物理学报, 2018, 32(5): 054203. doi: 10.11858/gywlxb.20180521
引用本文: 田泽, 韩阳, 尹晓文, 辛浩, 赵隆茂, 李志强. 截面几何参数对帽型梁轴向冲击响应的影响[J]. 高压物理学报, 2018, 32(5): 054203. doi: 10.11858/gywlxb.20180521
TIAN Ze, HAN Yang, YIN Xiaowen, XIN Hao, ZHAO Longmao, LI Zhiqiang. Effect of Sectional Geometric Parameters on Axial Impact Response of Hat-Section Beam[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 054203. doi: 10.11858/gywlxb.20180521
Citation: TIAN Ze, HAN Yang, YIN Xiaowen, XIN Hao, ZHAO Longmao, LI Zhiqiang. Effect of Sectional Geometric Parameters on Axial Impact Response of Hat-Section Beam[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 054203. doi: 10.11858/gywlxb.20180521

截面几何参数对帽型梁轴向冲击响应的影响

doi: 10.11858/gywlxb.20180521
基金项目: 

国家自然科学基金 11672199

山西省自然科学基础研究项目 201601D011011

详细信息
    作者简介:

    田泽(1992-), 男, 硕士研究生, 主要从事冲击动力学研究.E-mail:tianze0990@link.tyut.edu.cn

    通讯作者:

    李志强(1973-), 男, 博士, 教授, 主要从事冲击动力学和计算力学研究.E-mail:lizhiqiang@tyut.edu.cn

  • 中图分类号: O347;TG115

Effect of Sectional Geometric Parameters on Axial Impact Response of Hat-Section Beam

  • 摘要: 帽型梁结构作为汽车前纵梁主要部件,其轴向冲击变形模式和吸能特性是汽车被动安全设计的主要参考指标。为此,对带有倒角的帽型梁进行了初始能量为17.8 kJ的落锤轴向冲击实验和数值模拟。保持梁结构的质量不变,对不带倒角和直角弯折的两种截面梁进行同等条件的数值模拟,在一定范围内探讨截面几何参数对帽型梁的变形模式、变形量、吸能总量、峰值载荷、平均碰撞载荷和碰撞力效率的影响。结果表明:对于带有倒角的帽型梁,其变形模式和变形量的计算结果与实验结果基本吻合,验证了计算模型的合理性;倒角的存在使结构变形模式从非紧凑型向紧凑型转变,提高了缓冲效果,降低了峰值载荷;弯折角度由93°变为90°时,对变形模式的影响较小,非直角弯折梁的吸能效果较直角弯折梁好。因此,截面几何参数对帽型梁结构的变形模式和吸能特性有一定影响。

     

  • 图  Ⅰ型梁试件

    Figure  1.  Type-Ⅰ beam specimen

    图  Ⅰ型梁截面

    Figure  2.  Section of Type-Ⅰbeam specimen

    图  实验试样装配图

    Figure  3.  Specimen assembly of test specimen

    图  Ⅰ型梁轴向冲击变形过程

    Figure  4.  Deformation sequences of Type-Ⅰ beam under axial impact

    图  Ⅰ型梁载荷-时间曲线

    Figure  5.  Impact load history curve for Type-Ⅰ beam

    图  Ⅱ型梁截面

    Figure  6.  Section of Type-Ⅱ beam specimen

    图  Ⅲ型梁截面

    Figure  7.  Section of Type-Ⅲ beam specimen

    图  3种梁的有限元模型

    Figure  8.  Finite element models for 3 different types of beams

    图  实验和模拟载荷-时间曲线

    Figure  9.  Experimental and simulated load history curves for Type-Ⅰ beam

    图  10  3种梁的能量时程曲线

    Figure  10.  Energy history curves for 3 different types of beams

    图  11  Ⅰ型梁的变形过程

    Figure  11.  Deformation sequence of Type-Ⅰ beam

    图  12  Ⅱ型梁的变形过程

    Figure  12.  Deformation sequence of Type-Ⅱ beam

    图  13  Ⅲ型梁的变形过程

    Figure  13.  Deformation sequence of Type-Ⅲ beam

    图  14  3种梁的位移-时间曲线

    Figure  14.  Displacement history curves for 3 different beams

    图  15  3种梁的载荷-位移曲线

    Figure  15.  Load vs.displacement for 3 different beams

    图  16  3种梁的吸收能量-位移曲线

    Figure  16.  Energy vs.displacement for 3 different beams

    表  1  帽型梁的材料参数

    Table  1.   Material parameters for hat-section beam

    MaterialE/GPaνσs/MPaσb/MPaδ1/%
    DC012100.316530347.8
    CR380LA2100.341052424.8
    DP9802180.36601 03311.0
    下载: 导出CSV

    表  2  3种梁的变形模式参数

    Table  2.   Parameters of deformation modes for 3 different types of beams

    Specimenδ/mmtt/msnDeformation mode
    Type-Ⅰ beam208.5503Compact
    Type-Ⅱ beam184.2402Non-compact
    Type-Ⅲ beam181.7402Non-compact
    下载: 导出CSV

    表  3  3种梁的能量吸收参数

    Table  3.   Energy absorption parameters for 3 different types of beams

    Specimenδ/mmEa/kJFmax/kNFmean/kNη
    Type-Ⅰ beam208.517.777283.6685.260.30
    Type-Ⅱ beam184.217.616313.7995.630.30
    Type-Ⅲ beam181.717.550319.5996.590.30
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-03-07
  • 修回日期:  2018-03-27

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