CN111173876B

CN111173876B - High energy-absorbing ratio buffering energy-absorbing structure

Info

Publication number: CN111173876B
Application number: CN202010031993.4A
Authority: CN
Inventors: 王永辉; 刘孙涛; 翟希梅; 严佳川; 陆景宜
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2021-07-20
Anticipated expiration: 2040-01-13
Also published as: CN111173876A

Abstract

A high energy absorption ratio buffering energy-absorbing structure belongs to the technical field of buffering energy-absorbing structures. The invention solves the problems of higher manufacturing cost, complex processing procedure and poor energy absorption effect of the existing buffering energy absorption structure. Every energy-absorbing monomer all includes a plurality of crooked folded bodies that are formed by panel bending, every crooked folded body all includes the section of bending, the section of bending down and connects the straight section between section of bending down and the section of bending down, section of bending up, straight section and the section of bending down are S-shaped structure by last to arranging under to in proper order, and between section of bending up and the last low carbon board and between section of bending down and the low carbon board respectively through high strength bolt rigid coupling, and parallel arrangement is in proper order followed the horizontal direction to a plurality of crooked folded bodies, and every faces two crooked folded body staggered arrangement and every faces all through the connecting plate rigid coupling between the straight section of two crooked folded bodies mutually, and every straight section all is located same horizontal plane with the connecting plate. Simple structure, it is convenient to process, compares with prior art, and the cost is lower.

Description

High energy-absorbing ratio buffering energy-absorbing structure

Technical Field

The invention relates to a buffering energy-absorbing structure with a high energy-absorbing ratio, and belongs to the technical field of buffering energy-absorbing structures.

Background

At present, the buffering energy-absorbing structure is used as a vital defense line for life safety of people, and is widely applied to the fields of road traffic, automobiles, mechanical power systems, constructional engineering, military protection engineering and the like. The reliable buffering energy-absorbing structure can effectively avoid the loss of a lot of lives and properties. The buffer energy-absorbing structure mainly comprises high-performance materials such as a multi-cell material, foam metal, composite materials and the like, thin-wall pipe fittings such as corrugated pipes, round pipes and the like, elastic elements such as springs and the like and damping elements. Wherein, the materials such as the cellular material, the foam metal and the like have higher manufacturing cost and complex processing procedure, are only suitable for special fields and are not easy to popularize; and the corrugated pipe, the round pipe and other thin-wall pipes generally absorb energy by using plastic hinges generated by plastic deformation, and the energy absorption effect is common. Therefore, a buffering energy-absorbing structure with low cost, convenient processing and excellent energy-absorbing effect is urgently needed.

Disclosure of Invention

The invention provides a buffering energy-absorbing structure with a high energy-absorbing ratio, aiming at solving the problems of higher manufacturing cost, complex processing procedure and poor energy-absorbing effect of the existing buffering energy-absorbing structure.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a high energy-absorbing ratio buffering energy-absorbing structure comprises an upper low-carbon plate, a lower low-carbon plate and an energy-absorbing layer fixedly arranged between the upper low-carbon plate and the lower low-carbon plate, the energy absorption layer comprises a plurality of energy absorption monomers which are sequentially arranged in parallel along the horizontal direction, each energy absorption monomer comprises a plurality of bent folding bodies formed by bending plates, each bent folding body comprises an upper bent section, a lower bent section and a straight section connected between the upper bent section and the lower bent section, the upper bent section, the straight section and the lower bent section are sequentially arranged in an S-shaped structure from top to bottom, and go up between curved section and the last low carbon plate and the curved section under and pass through high strength bolt rigid coupling respectively between the low carbon plate, a plurality of crooked folded bodies are parallel arrangement in proper order along the horizontal direction, and every faces two crooked folded bodies staggered arrangement and all passes through the connecting plate rigid coupling between the straight section of every two crooked folded bodies that face mutually, and every straight section all is located same horizontal plane with the connecting plate.

Furthermore, the upper bending section and the lower bending section have the same structure and respectively comprise an arc section and a clip section, the arc section is positioned between the clip section and the straight section, and the clip section is positioned in the inner side direction of the arc surface of the arc section and is used for being bent into a bent folded body, and two end parts of the plate are correspondingly fixedly connected with the upper low-carbon plate and the lower low-carbon plate.

Further, each bending angle of the clip is 90 degrees.

Further, the central angle of the circular arc segment is 90 degrees, and the circular arc radius is equivalent to the length of the straight segment.

Further, the number of the bent folding bodies in each energy-absorbing monomer is even.

Further, gaskets are arranged between the high-strength bolt and the upper low carbon plate and between the high-strength bolt and the lower low carbon plate.

Furthermore, the energy absorption monomer is made of low-carbon steel.

Compared with the prior art, the invention has the following effects:

the energy absorption layer fully utilizes the moving hinge generated in the deformation process to absorb energy, the moving hinge generated in the deformation energy absorption process of the energy absorption layer can dissipate a large amount of energy, the energy absorption efficiency is greatly improved, and the energy absorption layer can be widely applied to the fields of road traffic, automobiles, mechanical power systems, building engineering, military protection engineering and the like.

This application is direct to be formed through panel bending, simple structure, and it is convenient to process, compares with prior art, and the cost is lower.

Drawings

FIG. 1 is a schematic perspective view of the present application;

FIG. 2 is a schematic perspective view of an energy absorbing monomer;

FIG. 3 is a schematic front view of the present application;

FIG. 4 is a schematic front view of a high strength bolt;

FIG. 5 is a schematic deployment view of an energy absorbing monomer.

Detailed Description

The first embodiment is as follows: the embodiment is described by combining figures 1-5, a high energy-absorbing ratio buffering energy-absorbing structure comprises an upper low-carbon plate 1, a lower low-carbon plate 2 and an energy-absorbing layer 3 fixedly arranged between the upper low-carbon plate and the lower low-carbon plate, wherein the energy-absorbing layer 3 comprises a plurality of energy-absorbing monomers 4 which are sequentially arranged in parallel along the horizontal direction, each energy-absorbing monomer 4 comprises a plurality of bent folded bodies formed by bending plates, each bent folded body comprises an upper bent section 5, a lower bent section 6 and a straight section 7 connected between the upper bent section 5 and the lower bent section 6, the upper bent section 5, the straight section 7 and the lower bent section 6 are sequentially arranged in an S-shaped structure from top to bottom, the upper bent section 5 and the upper low-carbon plate 1 and the lower bent section 6 and the lower low-carbon plate 2 are fixedly connected through high-strength bolts 8 respectively, the plurality of bent folded bodies are sequentially arranged in parallel along the horizontal direction, each two adjacent bent folded bodies are arranged in a staggered manner, and the straight section 7 of each two adjacent bent folded bodies are fixedly connected through a connecting plate 9, each straight section 7 and the connecting plate 9 are located in the same horizontal plane. And each bent folding body is obtained by cutting a low-carbon steel plate and then bending the low-carbon steel plate in the vertical direction. The upper bending section 5 and the lower bending section 6 are punched and the bolt caps are pre-welded before the upper bending section 5 and the upper low carbon plate 1 and the lower bending section 6 and the lower low carbon plate 2 are connected, the positions of the upper low carbon plate 1 and the lower low carbon plate 2 for connection are pre-perforated, the hole diameters of the upper low carbon plate 1 and the lower low carbon plate 2 (or the lower low carbon plate 2) are slightly larger than the diameter of a bolt rod of a high-strength bolt and the hole diameter of the upper bending section 5 (or the lower bending section 6), and certain construction errors can be prevented.

The energy absorption monomers 4 are arranged at the same position and then are pre-assembled at fixed positions by using a clamp, the fixed positions are connected with the low-carbon steel plate through high-strength bolts and gaskets 12, and the clamp is disassembled.

The plurality of bent folding bodies and the connecting plate 9 in each energy-absorbing monomer 4 can be formed by bending after being cut into integrally manufactured plates.

The upper bending section 5 and the lower bending section 6 are identical in structure and respectively comprise an arc section 10 and a circular section 11, the arc section 10 is located between the circular section 11 and the straight section 7, the circular section 11 is located in the inner side direction of the arc surface of the arc section 10, and the two end portions of the plate bent into the bending folding body are correspondingly fixedly connected with the upper low-carbon plate 2 and the lower low-carbon plate 2. In the compression deformation process, in the initial stage, one end of the arc section in the upper bending section and the lower bending section rotates around the straight section to form a plastic hinge, the other end of the arc section extrudes towards the middle along with the upper bending section and the lower bending section to form a moving hinge, the folding part of the upper bending section and the lower bending section begins to deform under pressure until the folding part begins to deform, and at the moment, the bent folding body mainly deforms through the two zigzag sections to absorb energy, so that the purpose of dissipating energy is achieved.

Each bending angle of the clip 11 is 90 degrees.

The central angle of the circular arc segment 10 is 90 degrees, and the circular arc radius is equal to the length of the straight segment 7. By the design, the processing is convenient.

The number of curved folds in each energy-absorbing unit 4 is an even number. By the design, the stress balance and stability are ensured.

Gaskets 12 are arranged between the high-strength bolt 8 and the upper low carbon plate 1 and between the high-strength bolt 8 and the lower low carbon plate 2. The gasket 12 is a rectangular steel sheet with a side length slightly larger than the aperture left by the mild steel sheet.

The energy-absorbing monomer 4 is made of low-carbon steel.

Claims

1. The utility model provides a high energy-absorbing ratio buffering energy-absorbing structure which characterized in that: it includes low carbon plate (1), low carbon plate (2) down and sets firmly energy-absorbing layer (3) between upper and lower low carbon plate, energy-absorbing layer (3) include along horizontal direction parallel arrangement' S a plurality of energy-absorbing monomer (4) in proper order, every energy-absorbing monomer (4) all include a plurality of crooked folded bodies that are formed by the panel bending type, every crooked folded body all includes last bending section (5), down bending section (6) and is connected straight section (7) between last bending section (5) and down bending section (6), go up bending section (5), straight section (7) and down bending section (6) and be S-shaped structural arrangement in proper order from the top down, and go up between bending section (5) and last low carbon plate (1) and down between bending section (6) and the low carbon plate (2) respectively through high strength bolt (8) rigid coupling, crooked a plurality of folded bodies are along horizontal direction parallel arrangement in proper order, and every faces between two crooked folded bodies staggered arrangement and every looks two crooked folded bodies and face between straight section (7) of bending folded body All through connecting plate (9) rigid coupling, every straight section (7) all is located same horizontal plane with connecting plate (9), go up bend section (5) and bend section (6) structure down the same, all include circular arc section (10) and time shape section (11), circular arc section (10) are located back between shape section (11) and straight section (7), just it is located the inboard direction of cambered surface of circular arc section (10) to return shape section (11) for the both ends correspondence of the panel of the crooked folded body of buckling and upper and lower low carbon plate (2) rigid coupling.

2. The structure of claim 1, wherein the structure has a high energy absorption ratio, and is characterized in that: each bending angle of the clip-shaped section (11) is 90 degrees.

3. The structure of claim 2, wherein the structure has a high energy absorption ratio, and is characterized in that: the central angle of the circular arc section (10) is 90 degrees, and the circular arc radius is equal to the length of the straight section (7).

4. A high energy absorbing ratio buffer energy absorbing structure according to claim 1, 2 or 3, wherein: the number of the bent folding bodies in each energy-absorbing monomer (4) is even.

5. The structure of claim 4, wherein the structure has a high energy absorption ratio, and is characterized in that: gaskets (12) are arranged between the high-strength bolt (8) and the upper low-carbon plate (1) and between the high-strength bolt (8) and the lower low-carbon plate (2).

6. A high energy absorbing ratio buffer energy absorbing structure according to claim 1, 2, 3 or 5, wherein: the energy-absorbing monomer (4) is made of low-carbon steel.