CN102826060B - Bionic energy absorption pipe of bamboo-like structure - Google Patents
Bionic energy absorption pipe of bamboo-like structure Download PDFInfo
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- CN102826060B CN102826060B CN201210352879.7A CN201210352879A CN102826060B CN 102826060 B CN102826060 B CN 102826060B CN 201210352879 A CN201210352879 A CN 201210352879A CN 102826060 B CN102826060 B CN 102826060B
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- constraint
- restraining
- restained
- outer tube
- tubular outer
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Abstract
The invention discloses a bionic energy absorption pipe of a bamboo-like structure, comprising a cylindrical outer pipe, a plurality of restraining rings, a plurality of restraining walls and a plurality of restraining beams, wherein the plurality of restraining rings are equidistantly arranged on the cylindrical outer pipe, each restraining wall is cylindrical, the plurality of restraining walls are sleeved in the cylindrical outer pipe, the plurality of restraining beams are arranged between the cylindrical outer pipe and the restraining walls and between the adjacent restraining walls, each restraining beam is connected with the adjacent two restraining walls through two supporting plates, and the restraining beams are in shapes of circular tubes; and the distribution density rho of the restraining beams is equal to n/2paiR, the rho represents the density of the restraining beams, the n represents the number of each layer of the restraining beams, and the R represents the radius of a circle in which the centers of the restraining beam are located. The bionic energy absorption pipe disclosed by the invention improves the capability of axially absorbing energy, namely improving the SEA (specific energy absorption), and also improving the transverse bearing capability.
Description
Technical field
The present invention relates to a kind of endergonic structure, more particularly to a kind of bionical energy absorbing tube of imitative bamboo structure.
Background technology
Various vehicles are required for anticollision device, collision-prevention device, and the energy-absorbing effect of existing energy-absorbing protection device is not good, smaller than energy-absorbing,
Than the size of energy-absorbing that energy-absorbing is Unit Weight endergonic structure.
The content of the invention
The invention aims to solve the problems, such as that existing endergonic structure is smaller than energy-absorbing, and one kind is provided and compares energy-absorbing
The bionical energy absorbing tube of big imitative bamboo structure.
Macro-and micro-structure of the present invention according to bamboo radially, axially, extracting affects bamboo wood energy absorption with carrying
Structural characteristic parameter, macroscopically draws ring with the regularity of distribution of bamboo pole height, show that fibre bundle is blue or green along bamboo on microcosmic ---
The gradient regularity of distribution of bamboo meat --- tabasheer.According to the ring mode of appearance of the discrete distribution of bamboo, the grand of bionical energy absorbing tube is designed
Structure is seen, the gradient distribution in radial fiber beam and cell membrane sandwich construction characteristic, design inside bionical energy absorbing tube according to bamboo wood
Internal structure.Above structure can also improve in the horizontal its bearing capacity in addition to improving axial energy-absorbing.
The present invention is made up of tubular outer tube, several constraint circles, several constraint walls and several restained beams, several constraint circles etc.
Spacing is arranged on tubular outer tube, and constraint wall is cylindrical in shape, and several constraint walls are enclosed within tubular outer tube, between tubular outer tube and constraint wall
And several restained beams are provided between adjacent constraint wall, each restained beam is respectively with two gripper shoes and two adjacent constraint walls
Connection, restained beam is cylindrical.
The distribution density of the restained beam meets following formula：
ρ=n/2πR
Wherein, ρ represents the density of restained beam, and n represents the number of every layer of restained beam, and R represents the circle that restained beam center is located
Radius.
Beneficial effects of the present invention：The ability that energy absorbing tube axially absorbs energy is improve, that is, the ratio that improve energy absorbing tube is inhaled
Can, the bearing capacity of energy absorbing tube is also improved in the horizontal.
Description of the drawings
The end view of Fig. 1 embodiment of the present invention.
The side view of Fig. 2 embodiment of the present invention.
Fig. 3 is the axial impact load and displacement curve figure of the embodiment of the present invention.
Fig. 4 changes over curve map for the axial impact of the embodiment of the present invention than energy-absorbing.
Fig. 5 radially bears load change figure for the bionical energy absorbing tube of the embodiment of the present invention.
Fig. 6 is radially carried than energy-absorbing variation diagram for the bionical energy absorbing tube of the embodiment of the present invention.
Specific embodiment
Refer to shown in Fig. 1 and Fig. 2, the present invention is by tubular outer tube 1, several constraint circles 2, several constraint walls 3 and several
Restained beam 4 is constituted, and several constraint circles 2 are set in qually spaced in tubular outer tube 1, and constraint wall 3 is cylindrical in shape, and several constraint walls 3 are enclosed within cylinder
In shape outer tube 1, several restained beams 4 are provided between tubular outer tube 1 and constraint wall 3 and between adjacent constraint wall 3, each constraint
Beam 4 is respectively connected with two gripper shoes 41 with two adjacent constraint walls 3, and restained beam 4 is cylindrical.
The distribution density of the restained beam meets following formula：
ρ=n/2πR
Wherein, ρ represents the density of restained beam, and n represents the number of every layer of restained beam, and R represents the circle that restained beam center is located
Radius.
Embodiment：
The length of tubular outer tube 1 is 300mm, a diameter of 80mm of tubular outer tube 1, and the wall thickness of tubular outer tube 1 is 1.5mm.
Constraint circle 2 is evenly distributed on tubular outer tube 1, and the external diameter of constraint circle 2 is 86mm, and the internal diameter of constraint circle 2 is 72mm,
The distance between adjacent constraint circle 2 is 120mm, and the wall thickness of constraint circle 2 is 3mm.
The distribution density of the restained beam：ρ=n/2πR
Wherein, ρ represents the density of bionic fiber beam restained beam, and n represents the number of every layer of restained beam, and R is represented in restained beam
The radius of the circle that the heart is located.
Restained beam 4 is cylindrical, and pipe external diameter is 3.5mm, and internal diameter is 2.5mm.
Axial constraint beam 4 is divided into three layers, and the density of every layer of restained beam 4 is distributed in radial direction by gradient, close from the outer to the inner
Degree is gradually reduced, and is denoted as ground floor, the second layer and third layer respectively from the outer to the inner.The number of restained beam is 8 in ground floor
It is individual, radius to be 35.75mm, distribution density ρ=0.08 of restained beam；The number of restained beam 4 is 12 in the second layer, and radius is
It is 29.75mm, distribution density ρ=0.064 of restained beam；The number of restained beam 4 is 8 in third layer, and it is 23.75mm that radius is,
Distribution density ρ=0.054 of restained beam.
Three layers of thickness of restained beam 4 inside tubular outer tube 1 are equal with the thickness of constraint wall 3, are 0.5mm, and per layer constrains
The spacing at the center of beam 4 is 11mm.
The finite element simulation test of the present invention
The material of tube wall adopts LD2 aluminium alloys, with moderate strength and higher plasticity, the density of material be ρ=2.7 ×
10-6kg/mm3, elastic modelling quantity is E=70GPa, and Poisson's ratio is μ=0.31, and yield strength is SIGY=0.25Gpa, in Hypermesh
Using MATL24 material models.The mass of quality m=600kg initial velocity v=10m/s and pipe and the collision of the rigid wall of fixation,
Tube wall adopts automatic single-contact algorithm during analytical calculation（single surface）, make tube wall compression when itself
The deformation of generation contacts with each other and rubs, and the confficient of static friction between the tube wall for being compressed is 0.3.
When pipe is compressed in the range of effective length, the average load of common pipe collision is 19.3, band axial constraint
The average load of the bionical energy absorbing tube of beam 4 be 122kN, the bionical energy absorbing tube with radial constraint circle 2 and axial constraint beam 4 it is average
Load is 112kN；The energy that common pipe absorbs is 4547kJ, and the energy that the bionical energy absorbing tube with axial restained beam 4 absorbs is
22819kJ, the energy that the bionical energy absorbing tube with radial constraint circle 2 and axial constraint beam 4 absorbs is 21194kJ.In collision process
In, bionical energy absorbing tube can effectively improve the gross energy of absorption.
As shown in figure 3, for axial impact load and the displacement curve figure of the present invention.
As shown in figure 4, the axial impact for the present invention changes over curve map than energy-absorbing.
As shown in figure 5, the bionical energy absorbing tube for the present invention radially bears load change figure.
As shown in fig. 6, the bionical energy absorbing tube for the present invention is radially carried than energy-absorbing variation diagram.
The energy absorption characteristics of different energy absorbing tube axial impacts are as shown in table 1：
The energy absorption characteristics of the different energy absorbing tube axial impacts of table 1
The energy absorption characteristics of different energy absorbing tube bending collisions are as shown in table 2：
The energy absorption characteristics of the different energy absorbing tube bending collisions of table 2
Claims (1)
1. a kind of bionical energy absorbing tube of imitative bamboo structure, is by tubular outer tube（1）, several constraint circles（2）, several constraint walls（3）With
Several restained beams（4）Constitute, several constraint circles（2）It is set in qually spaced in tubular outer tube（1）, constrain wall（3）It is cylindrical in shape, Shuo Geyue
Shu Bi（3）It is enclosed within tubular outer tube（1）It is interior, tubular outer tube（1）With constraint wall（3）Between and adjacent constraint wall（3）Between arrange
There are several restained beams（4）, each restained beam（4）Respectively with two gripper shoes（41）With two adjacent constraint walls（3）Connection, constraint
Beam（4）It is cylindrical, it is characterised in that：The distribution density of the restained beam meets following formula：
ρ=n/2 π R,
Wherein, ρ represents the density of restained beam, and n represents the number of every layer of restained beam, and R represents the half of the circle that restained beam center is located
Footpath；
Tubular outer tube（1）Length be 300mm, tubular outer tube（1）A diameter of 80mm, tubular outer tube（1）Wall thickness be
1.5mm；
Constraint circle（2）External diameter be 86mm, constraint circle（2）Internal diameter be 72mm, adjacent constraint circle（2）The distance between be
120mm, constraint circle（2）Wall thickness be 3mm；
Restained beam（4）External diameter is 3.5mm, and internal diameter is 2.5mm；
Axial constraint beam（4）Three layers are divided into, every layer of restained beam（4）Density radial direction by gradient be distributed, it is close from the outer to the inner
Degree is gradually reduced, and is denoted as ground floor, the second layer and third layer respectively from the outer to the inner；
Tubular outer tube（1）Three layers of internal restained beam（4）Thickness and constraint wall（3）Thickness it is equal, be 0.5mm, per layer about
Shu Liang（4）Center spacing be 11mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210352879.7A CN102826060B (en) | 2012-09-21 | 2012-09-21 | Bionic energy absorption pipe of bamboo-like structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210352879.7A CN102826060B (en) | 2012-09-21 | 2012-09-21 | Bionic energy absorption pipe of bamboo-like structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102826060A CN102826060A (en) | 2012-12-19 |
| CN102826060B true CN102826060B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210352879.7A Expired - Fee Related CN102826060B (en) | 2012-09-21 | 2012-09-21 | Bionic energy absorption pipe of bamboo-like structure |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106828600A (en) * | 2017-02-21 | 2017-06-13 | 汽-大众汽车有限公司 | A kind of bionical shock resistance lightweight structure |
| CN110793743A (en) * | 2019-11-25 | 2020-02-14 | 清华大学苏州汽车研究院（相城） | Combined section impact energy-absorbing thin-walled pipe |
| CN111559333A (en) * | 2020-05-28 | 2020-08-21 | 上海理工大学 | Collision-resistant front bumper anti-collision cross beam |
| CN113445667B (en) * | 2021-08-06 | 2022-08-12 | 吉林大学 | Energy-absorbing protection sandwich panel of imitative bamboo gradient variation structure |
| CN114056273B (en) * | 2021-11-30 | 2024-09-20 | 天津工业大学 | Hedgehog-like thorn type energy-absorbing box and manufacturing method thereof |
| CN114396446B (en) * | 2021-12-27 | 2023-03-17 | 吉林大学 | Bionic energy-absorbing plate core structure for sandwich panel and preparation method |
| CN116495023B (en) * | 2023-04-14 | 2024-03-08 | 西南交通大学 | Foam metal filled bamboo-like sandwich circular tube and preparation method thereof |
| CN118070625A (en) * | 2024-04-24 | 2024-05-24 | 西南交通大学 | Bamboo-like anti-creeping energy-absorbing device for high-speed train and crashworthiness design method of bamboo-like anti-creeping energy-absorbing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202764894U (en) * | 2012-09-21 | 2013-03-06 | 吉林大学 | Bionic energy absorption tube imitating bamboo structure |
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| DE19820433A1 (en) * | 1998-05-07 | 1999-11-11 | Emitec Emissionstechnologie | Support structure with a deformation element with oblique force transmission |
| US6755453B2 (en) * | 2002-08-29 | 2004-06-29 | Veridian Systems Division, Inc. | Deployable rigid system for crash energy management |
| JP4413650B2 (en) * | 2004-03-05 | 2010-02-10 | 本田技研工業株式会社 | Bonding structure for automotive frame materials |
| CN202294642U (en) * | 2011-07-22 | 2012-07-04 | 浙江吉利汽车研究院有限公司 | Energy-absorption box |
| CN102700488B (en) * | 2012-06-12 | 2015-04-08 | 湖南大学 | Buffering energy-absorbing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202764894U (en) * | 2012-09-21 | 2013-03-06 | 吉林大学 | Bionic energy absorption tube imitating bamboo structure |
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