Collision protection barrier based on energy absorption optimization

Abstract

The utility model provides a kind of anti-collision guardrail based on energy absorption optimization, comprising: stand, crossbeam and prevent resistance buffer piece;One or more crossbeams are installed on the stand, and prevent resistance buffer piece is arranged between the crossbeam and the stand;The prevent resistance buffer piece adopts bionic multicellular thin-walled structure, and the prevent resistance buffer piece includes: sliding block, buffer block and nut;Sliding block one end passes through buffer block and is fixed on stand by nut, and the other end is slidably installed on crossbeam.The prevent resistance buffer piece of bionic multicellular thin-walled structure is used in the application, and when colliding, prevent resistance buffer piece realizes material consumption reduction 30% under the condition of super folding crush energy absorption, and collision energy absorption efficiency is improved by more than 55%.

Description

Technical Field

[0001] This utility model relates to the field of guardrail structures, specifically to crash barriers based on energy absorption optimization. More particularly, it relates to a metal beam-column crash barrier based on energy absorption optimization. Background Technology

[0002] Guardrails are continuous structures made up of interlocking beams and supported by posts. They absorb energy during vehicle collisions, making them less prone to damage and providing excellent protection for vehicles and occupants.

[0003] Traditional metal guardrails suffer from drawbacks such as low collision energy absorption efficiency, large structural weight, and high maintenance costs. Therefore, a new guardrail system that combines high energy absorption rate with lightweight characteristics is needed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a crash barrier based on energy absorption optimization.

[0005] According to the present invention, a crash barrier based on energy absorption optimization includes: posts, beams, and anti-blocking buffer components;

[0006] One or more crossbeams are installed on the column, and a buffer is provided between the crossbeams and the column;

[0007] The anti-blocking buffer adopts a biomimetic multicellular thin-walled structure, and the anti-blocking buffer includes: a sliding block, a buffer block, and a nut;

[0008] One end of the sliding block passes through the buffer block and is fixed to the column by a nut, while the other end is slidably installed on the crossbeam.

[0009] Preferably, the buffer block comprises: an outer thin wall, a mounting ring hole, and an inner thin wall;

[0010] The outer thin wall is provided with a mounting ring hole for the sliding block to pass through;

[0011] A biomimetic multicellular thin-walled structure is formed by connecting multiple mounting ring holes within the same outer thin wall, between the mounting ring holes and the outer thin wall, and / or between different wall surfaces of the outer thin wall through internal thin walls. This biomimetic multicellular thin-walled structure increases the energy absorption density while reducing material weight by increasing the number of folded lobes.

[0012] Preferably, the buffer block is axially oriented towards the columns and beams at both ends.

[0013] Preferably, a groove is provided on the crossbeam along the extending direction, and a protrusion is provided at the end of the sliding block away from the nut. The sliding block is axially limited in the groove by the protrusion and is allowed to slide along the groove.

[0014] Preferably, the column comprises: a column body and a column base plate;

[0015] The column body is provided with a column base plate at the bottom, the column base plate is fixed on a horizontal surface, and the anti-blocking buffer is installed on one side of the column body.

[0016] Preferably, the side of the column body facing away from the anti-blocking buffer is provided with a curved energy dissipation angle.

[0017] Preferably, the grounding area of ​​the column base plate is greater than the horizontal cross-sectional area of ​​the column body.

[0018] Preferably, the column body with the curved energy-dissipating angle is inclined to increase the width of the column body from top to bottom, and the curved energy-dissipating angle is a curved surface that bends inward near the base plate of the column body.

[0019] Preferably, the columns are placed vertically, and multiple columns are provided;

[0020] Adjacent columns are connected by horizontally installed beams.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This application uses a biomimetic multicellular thin-walled structure for the anti-collision buffer. During a collision, the anti-collision buffer reduces the material usage by 30% while increasing the collision energy absorption efficiency by more than 55% through super-folded crushing energy absorption.

[0023] Meanwhile, the anti-collision buffer has excellent support and provides flexible guidance during low-speed collisions.

[0024] 2. This application uses a crossbeam with a groove, and the position of the crossbeam can be adjusted along the direction of the groove to make the line smoother.

[0025] 3. This application uses a crossbeam with a groove to slide and connect with the anti-blocking buffer, which eliminates the need for drilling holes and avoids the common problem of corrosion at bolt holes;

[0026] At the same time, it increases the section modulus of the steel beam by 20%, improves its bending resistance, and greatly enhances its unit capacity absorption capacity.

[0027] 4. This application sets a curved energy-dissipating angle at the bottom of the column. During a collision, the impact energy is converted into structural plastic deformation energy through the deformation mode of the column tilting and compressing, which can effectively absorb more than 16% of the energy. Attached Figure Description

[0028] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the crash barrier;

[0030] Figure 2 This is a side view of the crash barrier;

[0031] Figure 3 This is a schematic diagram of the beam structure;

[0032] Figure 4 A 3D view of the anti-blocking buffer component;

[0033] Figure 5 This is a schematic diagram of the end face structure of the buffer block;

[0034] As shown in the figure:

[0035] Detailed Implementation

[0036] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0037] like Figure 1 As shown, this embodiment includes: a column 1, a crossbeam 2, and a buffer component 3; the column 1 is placed vertically and multiple columns are spaced apart along the edge of the road. Adjacent columns 1 are connected by horizontally arranged crossbeams 2. There are generally multiple crossbeams 2. In this embodiment, three crossbeams 2 are arranged horizontally. A buffer component 3 is provided at the connection between the crossbeams 2 and the column 1.

[0038] like Figure 2As shown, the column 1 includes a column body 11 and a column base plate 13. The column body 11 is provided with the column base plate 13 at its bottom and is fixed to the ground by the column base plate 13. The column base plate 13 is usually fixed to the ground by bolts and nuts. The side of the column body 11 facing the road is used to install the anti-collision buffer 3, and the side facing away from the road is provided with a curved energy dissipation angle 12. The curved energy dissipation angle 12 is located near the column base plate 13 and has an inwardly curved surface. During a collision, the curved energy dissipation angle 12 converts the impact energy into structural plastic deformation energy through the deformation mode of the column 1 tilting and compressing. Finite element analysis shows that the curved energy dissipation angle 12 can effectively absorb more than 16% of the energy. In this embodiment, the side of the column body 11 with the curved energy dissipation angle 12 is tilted, so that the width of the column body 11 increases from top to bottom, thereby increasing the stability and impact resistance of the column body 11.

[0039] like Figure 3 As shown, a groove 21 is provided along the extension direction of the crossbeam 2. The presence of the groove 21 increases the moment of inertia of the cross section and improves the bending resistance. A protrusion is provided at the end of the sliding block 31 of the anti-blocking buffer 3 away from the nut 33. The sliding block 31 is axially limited by the protrusion engaging in the groove 21, while the protrusion can also slide along the groove 21, facilitating quick adjustment of the position of the crossbeam 2 without the need for bolts to extend from inside the crossbeam 2 for fixation. This makes installation convenient and facilitates rapid construction. Furthermore, since the crossbeam 2 does not require drilling, the common problem of corrosion at bolt holes is avoided.

[0040] like Figure 4 As shown, the anti-blocking buffer 3 is designed with a biomimetic multicellular thin-walled structure based on the structure of lotus leaf veins. The anti-blocking buffer 3 includes: a sliding block 31, a buffer block 32, and a nut 33; one end of the sliding block 31 passes through the buffer block 32 and is fixed to the column 1 by the nut 33, and the other end is slidably installed on the crossbeam 2. The axial direction of the buffer block 32 points towards the columns 1 and the crossbeam 2 at both ends.

[0041] Specifically, such as Figure 5As shown, the buffer block 32 includes: an outer peripheral thin wall 321, a mounting ring hole 322, and an inner thin wall 323; the outer peripheral thin wall 321 has a mounting ring hole 322 for the sliding block 31 to pass through; multiple mounting ring holes 322 within the same outer peripheral thin wall 321, the mounting ring holes 322 and the outer peripheral thin wall 321, and / or different wall surfaces of the outer peripheral thin wall 321 are connected by the inner thin wall 323 to form a biomimetic multi-cell thin-walled structure. The multi-cell thin-walled structure increases the folded lobes and increases the unit energy absorption density. In this embodiment, through finite element analysis, the anti-collision buffer 3 achieves a 30% reduction in material usage while increasing the collision energy absorption efficiency by more than 55% through super-folded crushing energy absorption; super-folded crushing energy absorption: it absorbs energy based on controllable plastic deformation, utilizing the bending and stretching of the plastic hinge lines generated during the folding process to form periodic folded units - folded lobes, converting the collision kinetic energy into the internal energy of the material. At the same time, the anti-collision buffer 3 has excellent support and provides flexible guidance during low-speed collisions. Flexible guidance refers to a smoother transition of the vehicle body during attitude changes, reducing the impact acceleration experienced by occupants and mitigating injury. In this embodiment, flexible guidance is achieved through a slight axial sliding of the sliding block 31 and the over-folding of the buffer block 32.

[0042] In a preferred embodiment, the grounding area of ​​the column base plate 13 is larger than the horizontal cross-sectional area of ​​the column body 11, which can further enhance the stability and impact resistance of the column 1.

[0043] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A crash barrier based on energy absorption optimization, characterized in that, include: Columns (1), beams (2), and anti-blocking buffers (3); One or more crossbeams (2) are installed on the column (1), and a buffer (3) is provided between the crossbeam (2) and the column (1). The anti-blocking buffer (3) adopts a biomimetic multi-cell thin-walled structure. The anti-blocking buffer (3) includes: a sliding block (31), a buffer block (32), and a nut (33). One end of the sliding block (31) passes through the buffer block (32) and is fixed to the column (1) by the nut (33), while the other end is slidably installed on the crossbeam (2); The buffer block (32) includes: an outer thin wall (321), a mounting ring hole (322), and an inner thin wall (323); The outer peripheral thin wall (321) is provided with a mounting ring hole (322) for the sliding block (31) to pass through. A biomimetic multicellular thin-walled structure is formed by connecting multiple mounting ring holes (322) within the same outer peripheral thin wall (321), between mounting ring holes (322) and outer peripheral thin wall (321), and / or between different wall surfaces of outer peripheral thin wall (321) through an inner thin wall (323).

2. The crash barrier based on energy absorption optimization according to claim 1, characterized in that: The buffer block (32) is axially oriented towards the columns (1) and beams (2) at both ends.

3. The crash barrier based on energy absorption optimization according to claim 1, characterized in that: The crossbeam (2) is provided with a groove (21) along the extension direction. The sliding block (31) is provided with a protrusion at one end away from the nut (33). The sliding block (31) is axially limited in the groove (21) by the protrusion and is allowed to slide along the groove (21).

4. The crash barrier based on energy absorption optimization according to claim 1, characterized in that, The column (1) includes: column body (11) and column base plate (13). The bottom of the column body (11) is provided with a column base plate (13), the column base plate (13) is fixed on the horizontal plane, and the anti-blocking buffer (3) is installed on one side of the column body (11).

5. The crash barrier based on energy absorption optimization according to claim 4, characterized in that: The column body (11) is provided with a curved energy dissipation angle (12) on the side facing away from the anti-blocking buffer (3).

6. The crash barrier based on energy absorption optimization according to claim 4, characterized in that: The grounding area of ​​the column base plate (13) is greater than the horizontal cross-sectional area of ​​the column body (11).

7. The crash barrier based on energy absorption optimization according to claim 5, characterized in that: The column body (11) is provided with a curved surface energy dissipation angle (12) on one side, which is tilted to increase the width of the column body (11) from top to bottom. The curved surface energy dissipation angle (12) is a curved surface that bends inward on one side of the column body (11) near the column base plate (13).

8. The crash barrier based on energy absorption optimization according to claim 1, characterized in that: The column (1) is placed vertically, and multiple columns (1) are provided; Adjacent columns (1) are connected by horizontally installed beams (2).

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