CN106740604A - 用于汽车被碰撞时吸能的四晶胞金属管 - Google Patents

用于汽车被碰撞时吸能的四晶胞金属管 Download PDF

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Publication number
CN106740604A
CN106740604A CN201611075146.8A CN201611075146A CN106740604A CN 106740604 A CN106740604 A CN 106740604A CN 201611075146 A CN201611075146 A CN 201611075146A CN 106740604 A CN106740604 A CN 106740604A
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Prior art keywords
pipe
taper
main body
absorbing
wall
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CN201611075146.8A
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Inventor
刘小龙
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Chengdu Bei Enyun Advertising Media Co Ltd
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Chengdu Bei Enyun Advertising Media Co Ltd
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Priority to CN201611075146.8A priority Critical patent/CN106740604A/zh
Publication of CN106740604A publication Critical patent/CN106740604A/zh
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/023Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R2019/026Buffers, i.e. bumpers of limited extent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

本用于汽车被碰撞时吸能的四晶胞金属管,主体为锥形薄壁管,在主体内设置有“十”字形的管壁,管壁从主体顶端延伸到底端;主体中部设置有内凹的预制变形槽。主体的锥度为0.3。由于锥管与刚性墙接触时,其锥管外径要比圆管的小,导致锥管的强度降低,比外径较大的圆管更容易被压缩,相应产生较小的初始峰值载荷。因此,在薄壁管的碰撞吸能过程中,与圆管相比,锥管提高了薄壁管的比吸能。锥度为0.3的锥管在斜碰过程中,随着斜碰偏角的减小,在加载速度方向的分力增加,使得初始峰值载荷升高,比吸能增大。因此,锥度为0.3时为最优。在增加预制变形槽后,变形先在预制变形槽处发生,变形方向、变形过程变得可控,进一步提高了四晶胞锥管的吸能性能。

Description

用于汽车被碰撞时吸能的四晶胞金属管
技术领域
本发明涉及用于汽车被碰撞时吸能的四晶胞金属管。
背景技术
汽车结构件在高速碰撞过程中吸能特性是碰撞安全研究的基础。薄壁金属管是汽车的基本结构,也是碰撞时的主要吸能结构。薄壁金属管在受到轴向载荷碰撞时会产生不同变形模式来吸收和耗散能量,保障车辆及乘客的安全。因此,关于薄壁金属管在高速碰撞过程中吸能特性的研究是汽车碰撞安全方面的基础。国内外对于薄壁金属管的研究主要集中在方管与圆管吸能特性的研究,而对于锥形管的碰撞吸能、特别是带有晶胞的锥形管能量吸收特性的还没有研究。
发明内容
本发明的目的是提供一种用于汽车被碰撞时吸能的四晶胞金属管,弥补薄壁金属管中还没有锥形管的空白。
本用于汽车被碰撞时吸能的四晶胞金属管,主体为锥形薄壁管,在主体内设置有“十”字形的管壁,管壁从主体顶端延伸到底端;主体中部设置有内凹的预制变形槽。
主体的锥度为0.3。
主体壁厚与高度的比值为1:15~1:30。
主体壁厚与高度的比值为1:25。
预制变形槽为连续的环形槽或者断续的环形槽。
预制变形槽的横截面为三角形。
由于锥管与刚性墙接触时,其锥管外径要比圆管的小,导致锥管的强度降低,比外径较大的圆管更容易被压缩,相应产生较小的初始峰值载荷。因此,在薄壁管的碰撞吸能过程中,与圆管相比,锥管提高了薄壁管的比吸能。锥度为0.3的锥管在斜碰过程中,随着斜碰偏角的减小,在加载速度方向的分力增加,使得初始峰值载荷升高,比吸能增大。因此,锥度为0.3时为最优。在增加预制变形槽后,变形先在预制变形槽处发生,变形方向、变形过程变得可控,进一步提高了四晶胞锥管的吸能性能。
附图说明
图1为本发明的结构示意图。
具体实施方式
如图1所示,用于汽车被碰撞时吸能的四晶胞金属管,主体1为锥形薄壁管,在主体1内设置有“十”字形的管壁2,管壁2从主体1顶端延伸到底端。;主体1中部设置有内凹的预制变形槽3。主体1的锥度为0.3。主体1壁厚与高度的比值为1:15~1:30,比值最优为1:25。预制变形槽3为连续的环形槽或者断续的环形槽。预制变形槽3的横截面为三角形。
建立四晶胞锥管有限元模型,并对有限元模型进行碰撞仿真分析,得到碰撞仿真后的变形模式。四晶胞锥管变形更加匀称,这是由于四晶胞锥管在碰撞过程中所受载荷分布均匀。在增加预制变形槽3后,变形先在预制变形槽3处发生,变形方向、变形过程变得可控,进一步提高了四晶胞锥管的吸能性能。

Claims (6)

1.用于汽车被碰撞时吸能的四晶胞金属管,其特征在于:主体(1)为锥形薄壁管,在主体(1)内设置有“十”字形的管壁(2),管壁(2)从主体(1)顶端延伸到底端;主体(1)中部设置有内凹的预制变形槽(3)。
2.根据权利要求1所述的金属管,其特征在于:主体(1)的锥度为0.3。
3.根据权利要求1或2所述的金属管,其特征在于:主体(1)壁厚与高度的比值为1:15~1:30。
4.根据权利要求3所述的金属管,其特征在于:主体(1)壁厚与高度的比值为1:25。
5.根据权利要求1所述的金属管,其特征在于:预制变形槽(3)为连续的环形槽或者断续的环形槽。
6.根据权利要求5所述的金属管,其特征在于:预制变形槽(3)的横截面为三角形。
CN201611075146.8A 2016-11-28 2016-11-28 用于汽车被碰撞时吸能的四晶胞金属管 Pending CN106740604A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108312990A (zh) * 2017-12-05 2018-07-24 同济大学 一种多管组合式缓冲防撞装置
CN109305120A (zh) * 2018-03-07 2019-02-05 华中科技大学 一种装配式自锁型多胞能量吸收器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108312990A (zh) * 2017-12-05 2018-07-24 同济大学 一种多管组合式缓冲防撞装置
CN108312990B (zh) * 2017-12-05 2024-04-05 同济大学 一种多管组合式缓冲防撞装置
CN109305120A (zh) * 2018-03-07 2019-02-05 华中科技大学 一种装配式自锁型多胞能量吸收器

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