CN214939641U - Corrugated energy absorption structure - Google Patents
Corrugated energy absorption structure Download PDFInfo
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- CN214939641U CN214939641U CN202120623276.0U CN202120623276U CN214939641U CN 214939641 U CN214939641 U CN 214939641U CN 202120623276 U CN202120623276 U CN 202120623276U CN 214939641 U CN214939641 U CN 214939641U
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Abstract
The utility model provides a ripple energy-absorbing structure, which comprises a plurality of energy-absorbing columns, wherein the energy-absorbing columns are formed by splicing a plurality of ripple units; the corrugated unit is formed by splicing two corrugated sheets; an angle is formed between the two corrugated sheets, and each corrugated sheet comprises linear edges arranged at the upper side and the lower side; a corrugated curved surface is arranged between the two straight line edges, and the side view of the curved surface is a curve; by applying the technical scheme, the energy absorption structure can have high energy absorption capacity in the collision process.
Description
Technical Field
The utility model relates to an energy-absorbing field specifically indicates a ripple energy-absorbing structure.
Background
In recent years, with the rapid development of the transportation industry, the density of urban networks and logistics networks and the transportation speed are rapidly increasing. This presents a significant challenge to safety issues for personnel and articles, where the protective structure requires sufficient cushioning and energy absorption to achieve safety for the occupants and articles in the face of complex and high speed conditions. However, the current structure often has high buffer capacity and low initial rigidity but is not ideal enough in energy absorption, or can absorb energy captured in collision but has high rigidity to cause large overload at the moment of collision, and the fresh protection structure has the characteristics of being capable of taking both the high buffer capacity and the low initial rigidity.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a ripple energy-absorbing structure realizes making energy-absorbing structure have high energy absorption ability at collision process.
In order to solve the technical problem, the utility model provides a corrugated energy absorption structure, which comprises a plurality of energy absorption columns, wherein the energy absorption columns are formed by splicing a plurality of corrugated units; the corrugated unit is formed by splicing two corrugated sheets; an angle is formed between the two corrugated sheets, and each corrugated sheet comprises linear edges arranged at the upper side and the lower side; a corrugated curved surface is arranged between the two straight line edges, the side view of the curved surface is a curve, and the curve meets the requirement of
The x direction is parallel to the structural direction of the energy absorption box, and the y direction is perpendicular to the stress direction of the energy absorption box and is parallel to the tangential direction of the curved surface; a is a ripple amplitude coefficient, b is a structural periodicity parameter, and is a parameter for representing the structural periodicity, and the smaller b represents that the ripple quantity generated by the ripple sheet is more.
In a preferred embodiment, the corrugated sheet is formed by laminating a first composite thin-wall structure layer, a three-dimensional lattice structure layer and a second composite thin-wall structure layer.
In a preferred embodiment, the three-dimensional lattice structure layer is specifically composed of a plurality of three-dimensional lattice units; the three-dimensional lattice cell includes a plurality of rotationally symmetrically disposed cosine panels.
In a preferred embodiment, the cosine panel comprises an upper panel, a lower panel and a plane panel, wherein the upper panel and the lower panel are arranged in parallel, and the plane panel is arranged perpendicular to the upper panel; the two ends of the curved plate are respectively connected with the upper panel and the lower panel; the side view of the curved plate is a cosine curve.
In a preferred embodiment, the cosine curve satisfies:
wherein y issAnd xsTo construct the coordinate system of the curve, c and d are the amplitude and the cycle frequency of the curve, respectively.
In a preferred embodiment, the first composite thin-wall structure layer and the second composite thin-wall structure layer are formed by splicing a plurality of hexagonal units; the hexagonal units are spliced by overlapping the edges of the hexagonal units.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
1. the gradient corrugated structure inspired by paper folding can optimize and promote collision overload and the energy absorption level of the whole structure. By combining the Miura-Ori paper folding method with the sine curve with the ripple characteristic, the structure has more continuity compared with the traditional paper folding method, and combines the advantages of rigid paper folding design and ripple design, thereby improving the energy absorption characteristic of the structure. The gradient design is carried out in the stress direction, so that the structure has lower initial rigidity (low initial collision overload) and simultaneously has more excellent energy absorption level in the crushing process.
2. The structure is high in designability and programmability, and different structure styles can be generated to adapt to different working condition environments. The utility model discloses an overall structure has adopted the parametric design method in a large number for the optimization that the structure can be better forms the structure of different shapes with the operational environment who adapts to the difference.
3. The laminated board with the sandwich composite structure improves the structure lightweight level and optimizes the structure mechanical property. According to the three-layer design method of the sandwich composite structure, the position of the lattice structure of the middle layer is determined through the honeycomb carving of the upper layer and the lower layer, and the overall lightweight level of the structure is improved under the condition of improving the mechanical property of the structure by utilizing the hollow design of the unique curved surface form of the lattice structure.
Drawings
FIG. 1 is a schematic view of the overall structure of a corrugated energy absorbing structure according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of an energy absorbing pillar of a corrugated energy absorbing structure according to a preferred embodiment of the present invention;
FIG. 3 is a schematic structural view of a corrugated unit of the corrugated energy absorbing structure according to the preferred embodiment of the present invention;
FIG. 4 is a schematic structural view of a corrugated sheet of the corrugated energy absorbing structure according to the preferred embodiment of the present invention;
FIG. 5 is a schematic structural view of a three-dimensional lattice unit of a corrugated energy absorbing structure according to a preferred embodiment of the present invention;
FIG. 6 is a schematic front view of a three-dimensional lattice unit of a corrugated energy absorbing structure according to a preferred embodiment of the present invention;
FIG. 7 is a schematic top view of a three-dimensional lattice unit of a corrugated energy absorbing structure according to a preferred embodiment of the present invention;
fig. 8 is a schematic structural view of a first composite thin-wall structural layer of the corrugated energy absorbing structure according to the preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
A corrugated energy absorption structure, refer to figures 1 to 8, and comprises a plurality of energy absorption columns 1, so that the whole energy absorption structure can have sufficient deformation crushing space in the process of crushing after being collided, and each energy absorption column 1 adopts the same height h to ensure that most energy absorption columns 1 can simultaneously generate energy absorption effect in the collision moment. The energy absorption column 1 is formed by splicing and enclosing a plurality of corrugated units 11; the corrugated unit 11 is formed by splicing two corrugated sheets 111; an angle is formed between the two corrugated sheets 111, and the corrugated sheets 111 comprise straight edges arranged at the upper side and the lower side; a corrugated curved surface is arranged between the two straight line edges, the side view of the curved surface is a curve, and the curve meets the requirement of
The x direction is parallel to the structural direction of the energy absorption box, and the y direction is perpendicular to the stress direction of the energy absorption box and is parallel to the tangential direction of the curved surface; a is a ripple amplitude coefficient, b is a structural periodicity parameter, which is a parameter for characterizing the structural periodicity, and a smaller b represents a greater number of ripples generated by the ripple sheet 111. In the present embodiment, the corrugated unit 11 is provided in 4 numbers.
It can be seen from the equation that the amplitude of the structural ripple is mainly determined by x and a, so the amplitude of the ripple of the corrugated sheet 111 increases more and more from the initial point (origin) upwards (positive x direction increases), and a can control the degree of the ripple amplitude, and the larger the value of a, the less the influence of x on the whole structure is, the less the ripple amplitude is, and vice versa. For the energy absorption structure, under the same space (the same interval size of x), the larger the ripple amplitude is, the smaller the force generated by the corrugated sheet 111 at the moment of collision is, the obvious buffering is realized, but the energy absorption is insufficient, and the small ripple amplitude can obviously improve the energy absorption performance and the material utilization rate of the structure, so that different a can obtain different buffering and energy absorption capacities. For another parameter b, which is a structural periodicity parameter, which is a parameter characterizing the structural periodicity, a smaller b represents a greater number of corrugations generated by the corrugated sheet 111. It can be seen that different energy absorption effects can be obtained by selecting two different structural parameters a and b according to different application conditions.
The gradient corrugated structure inspired by paper folding can optimize and promote collision overload and the energy absorption level of the whole structure. By combining the Miura-Ori paper folding method with the sine curve with the ripple characteristic, the structure has more continuity compared with the traditional paper folding method, and combines the advantages of rigid paper folding design and ripple design, thereby improving the energy absorption characteristic of the structure. The gradient design is carried out in the stress direction, so that the structure has lower initial rigidity (low initial collision overload) and simultaneously has more excellent energy absorption level in the crushing process.
The structure is high in designability and programmability, and different structure styles can be generated to adapt to different working condition environments. The utility model discloses an overall structure has adopted the parametric design method in a large number for the optimization that the structure can be better forms the structure of different shapes with the operational environment who adapts to the difference.
The corrugated sheet 111 is specifically formed by laminating a first composite thin-wall structure layer 21, a three-dimensional lattice structure layer 22 and a second composite thin-wall structure layer 23. The first composite material thin-wall structure layer 21 and the second composite material thin-wall structure layer 23 are formed by splicing a plurality of hexagonal units 211; the hexagonal cells 211 are spliced by overlapping the sides of the hexagonal cells 211.
The three-dimensional lattice structure layer 22 is specifically composed of a plurality of three-dimensional lattice units 220; the three-dimensional lattice cell 220 includes a plurality of rotationally symmetrically arranged cosine panels. The cosine panel comprises an upper panel 221, a lower panel 223 and a plane plate, wherein the upper panel 221 and the lower panel 223 are arranged in parallel, and the plane plate is perpendicular to the upper panel 221; a curved plate 222 having two ends connected to the upper panel 221 and the lower panel 223, respectively; the side view of the curved plate 222 is a cosine curve.
The cosine curve satisfies:
wherein y issAnd xsTo construct the coordinate system of the curve, c and d are the amplitude and the cycle frequency of the curve, respectively.
The laminated board with the sandwich composite structure improves the structure lightweight level and optimizes the structure mechanical property. According to the three-layer design method of the sandwich composite structure, the position of the lattice structure of the middle layer is determined through the honeycomb carving of the upper layer and the lower layer, and the overall lightweight level of the structure is improved under the condition of improving the mechanical property of the structure by utilizing the hollow design of the unique curved surface form of the lattice structure.
The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.
Claims (6)
1. A corrugated energy absorption structure is characterized by comprising a plurality of energy absorption columns, wherein the energy absorption columns are formed by splicing and enclosing a plurality of corrugated units; the corrugated unit is formed by splicing two corrugated sheets; an angle is formed between the two corrugated sheets, and each corrugated sheet comprises linear edges arranged at the upper side and the lower side; a corrugated curved surface is arranged between the two straight line edges, the side view of the curved surface is a curve, and the curve meets the requirement of
The x direction is parallel to the structural direction of the energy absorption box, and the y direction is perpendicular to the stress direction of the energy absorption box and is parallel to the tangential direction of the curved surface; a is a ripple amplitude coefficient, b is a structural periodicity parameter, and is a parameter for representing the structural periodicity, and the smaller b represents that the ripple quantity generated by the ripple sheet is more.
2. The corrugated energy absorbing structure of claim 1, wherein the corrugated sheet is formed by stacking a first composite thin-wall structure layer, a three-dimensional lattice structure layer and a second composite thin-wall structure layer.
3. The corrugated energy absorbing structure of claim 2, wherein the three-dimensional lattice structure layer is comprised in particular of a plurality of three-dimensional lattice units; the three-dimensional lattice cell includes a plurality of rotationally symmetrically disposed cosine panels.
4. The corrugated energy absorbing structure of claim 3, wherein the cosine panels comprise an upper panel, a lower panel disposed parallel to each other, and a planar panel disposed perpendicular to the upper panel; the two ends of the curved plate are respectively connected with the upper panel and the lower panel; the side view of the curved plate is a cosine curve.
6. The corrugated energy absorbing structure of claim 2, wherein the first composite thin-wall structural layer and the second composite thin-wall structural layer are formed by splicing a plurality of hexagonal units; the hexagonal units are spliced by overlapping the edges of the hexagonal units.
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Cited By (1)
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CN114394058A (en) * | 2021-12-28 | 2022-04-26 | 广州大学 | Curved surface paper folding tube structure with good buffering energy-absorbing characteristic |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN114394058A (en) * | 2021-12-28 | 2022-04-26 | 广州大学 | Curved surface paper folding tube structure with good buffering energy-absorbing characteristic |
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