CN115447629A - Multi-tube combined energy absorption device with different heights and ripple phases - Google Patents
Multi-tube combined energy absorption device with different heights and ripple phases Download PDFInfo
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- CN115447629A CN115447629A CN202211167260.9A CN202211167260A CN115447629A CN 115447629 A CN115447629 A CN 115447629A CN 202211167260 A CN202211167260 A CN 202211167260A CN 115447629 A CN115447629 A CN 115447629A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
- B61F19/04—Bumpers or like collision guards
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Abstract
The invention discloses a multi-tube combined energy absorption device with different heights and ripple phases, which comprises a thin-wall shell with an inner cavity, a plurality of energy absorption corrugated tubes arranged in the inner cavity and a front end plate for sealing the inner cavity, wherein each energy absorption corrugated tube has different heights, and the ripple curve of the side wall of each energy absorption corrugated tube meets the requirement of the ripple curve of the side wall of each energy absorption corrugated tube
Wherein i is the serial number of the energy-absorbing corrugated pipe; wave crests and wave troughs are formed on the side walls of the energy-absorbing corrugated pipes, and the wave crests and the wave troughs between two adjacent energy-absorbing corrugated pipes are arranged in a staggered manner; by introducing the height difference configuration characteristic, the plurality of energy-absorbing corrugated pipes are staggered during initial deformation, the original concentrated initial peak load is separated, and the initial peak load of the whole device can be greatly reduced; the introduction of the wave phase difference configuration characteristics changes the positions of wave crests and wave troughs of sinusoidal curves of the side walls, so that different pipe fittings compensate each other during deformation, and the subsequent load of each pipeThe load peak values are sufficiently separated to significantly reduce subsequent load fluctuations of the composite structure.
Description
Technical Field
The invention relates to the field of vehicle collision safety, in particular to a multi-tube combined energy absorption device with different heights and ripple phases.
Background
With the continuous increase of the speed of high-speed railways, the requirements on train safety are higher and higher. The train collision is a very serious accident, and the energy absorption protection device arranged on the train can protect the life and property safety of people at the first time. The thin-wall circular tube structure can absorb a large amount of energy when being impacted, so that the impact caused by the impact can be absorbed. Although the energy absorption of the energy absorption protection device can be doubled by simply superposing the number of the pipe fittings, problems exist, such as initial load peak value and overlarge load fluctuation, and the problems can not well protect the life and property safety of people when an accident occurs, and unnecessary loss is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a multi-tube combined energy absorption device which has high energy dissipation, low initial peak value and small load fluctuation and has different heights and ripple phases.
In order to solve the technical problem, the invention adopts the following technical scheme: a multi-tube combined energy absorption device with different heights and corrugation phases comprises a thin-wall shell with an inner cavity, a plurality of energy absorption corrugated tubes arranged in the inner cavity and a front end plate covering the inner cavity, wherein each energy absorption corrugated tube has a different height;
the ripple curve of the side wall of each energy-absorbing bellows meets the requirement
Wherein i is the serial number of the energy-absorbing corrugated pipe; wave crests and wave troughs are formed on the side walls of the energy-absorbing corrugated pipes, and the wave crests and the wave troughs between every two adjacent energy-absorbing corrugated pipes are arranged in a staggered mode.
As a further improvement of the technical scheme:
a plurality of the energy absorption corrugated pipes are arranged in the inner cavity from high to low or from low to high in an equidistant mode.
The plurality of corrugated energy absorption pipes are arranged in the inner cavity in a plurality of rows.
The energy-absorbing corrugated pipe is fixed in the inner cavity through welding.
The diameter of the bottom of the energy-absorbing corrugated pipe is 40mm, and the wall thickness of the energy-absorbing corrugated pipe is 2mm.
Compared with the prior art, the invention has the advantages that:
according to the multi-tube combined energy absorption device with different heights and ripple phases, the plurality of energy absorption corrugated tubes are staggered during initial deformation by introducing the height difference configuration characteristic, the initial peak loads of the energy absorption corrugated tubes are controlled to be compactly distributed at different time nodes, the originally concentrated initial peak loads are separated, and the initial peak loads of the whole device can be greatly reduced; the introduction of the corrugation phase difference configuration characteristics changes the positions of wave crests and wave troughs of a sine curve of a side wall, the positions of the wave crests and the wave troughs determine time nodes of corrugation deformation, the time nodes of the corrugation deformation determine time nodes of subsequent peak loads, the corrugations of each pipe fitting are endowed with proper and different phases, so that the whole device can be deformed at any moment in the deformation process, different pipe fittings are mutually compensated when deformed, the subsequent load peak values of each pipe are sufficiently separated, the subsequent load fluctuation of a combined structure is remarkably reduced, the multi-pipe combined energy absorption device has an impact force curve which is as stable as a honeycomb structure, and the perfect compatibility of excellent energy absorption characteristics such as high energy dissipation, low initial peak values, small load fluctuation and the like is realized.
Drawings
FIG. 1 is a schematic perspective view of a multi-tube modular energy absorber apparatus of the present invention.
FIG. 2 is a schematic perspective view of an arrangement of six energy absorbing bellows of the present invention.
FIG. 3 is a schematic perspective view of a typical equipartition bellows (a single energy absorbing bellows or a plurality of energy absorbing bellows of the same height).
FIG. 4 is a schematic diagram of an arrangement of a plurality of energy absorbing bellows of different heights in accordance with the present invention.
Fig. 5 is a schematic representation of the compression phase (correlation between peak, trough and pleat formation) of a typical bellows.
FIG. 6 is a graph of the expected effect of the combined height differential and phase differential energy absorption apparatus of the present invention when subjected to a force.
Figure 7 is a load-displacement diagram of each tubular with only the introduction of the height difference configuration.
Figure 8 is a schematic of the load-displacement of each tube when only the corrugation profile phase difference configuration is introduced.
Fig. 9 is a schematic view of the load-displacement of each tube when the height difference and the ripple phase difference are introduced simultaneously.
FIG. 10 is a graphical comparison of the results of a differently configured six-tube combination energy absorber device of the present invention versus a conventional six-tube combination energy absorber device of the same configuration.
FIG. 11 is a schematic diagram comparing the impact performance of the six-tube energy absorption device with the same configuration.
The reference numerals in the figures denote:
1. a front end plate; 2. an energy absorbing bellows; 3. a thin-walled housing; 31. an inner cavity; a. The 1 -A 6 And six energy-absorbing corrugated pipes.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 11 show an embodiment of a multi-tube modular energy absorber device of the present invention having different heights and corrugation phases, comprising a thin-walled shell 3 having an inner cavity 31, a plurality of energy absorbing bellows 2 disposed in the inner cavity 31, a front end plate 1 covering the inner cavity 31, the plurality of energy absorbing bellows 2 each having a different height; the corrugated curve of each energy-absorbing corrugated pipe 2 side wall meets
Wherein i is the serial number of the energy-absorbing corrugated pipe 2; the side wall of the energy-absorbing corrugated pipe 2 is provided with wave crests and wave troughsThe wave crests and the wave troughs between two adjacent energy-absorbing corrugated pipes 2 are arranged in a staggered manner.
According to the multi-tube combined energy absorption device, the plurality of energy absorption corrugated tubes 2 are staggered during initial deformation by introducing the height difference configuration characteristic, the initial peak loads of the energy absorption corrugated tubes 2 are controlled to be compactly distributed at different time nodes, the original concentrated initial peak loads are separated, and the initial peak loads of the whole device can be greatly reduced; the introduction of the corrugation phase difference configuration characteristics changes the positions of wave crests and wave troughs of a sine curve of a side wall, the positions of the wave crests and the wave troughs determine time nodes of corrugation deformation, the time nodes of the corrugation deformation determine time nodes of subsequent peak loads, the corrugations of each pipe fitting are endowed with proper and different phases, so that the whole device can be deformed at any moment in the deformation process, different pipe fittings are mutually compensated when deformed, the subsequent load peak values of each pipe are sufficiently separated, the subsequent load fluctuation of a combined structure is remarkably reduced, the multi-pipe combined energy absorption device has an impact force curve which is as stable as a honeycomb structure, and the perfect compatibility of excellent energy absorption characteristics such as high energy dissipation, low initial peak values and small load fluctuation is realized (as shown in figure 6).
In this embodiment, six energy absorbing bellows 2 are used ((A) 1 -A 6 ) For example, six corrugated energy absorbing tubes are arranged in two rows with suitable distances and equidistantly arranged in the inner cavity 31. The structural parameters of the six energy-absorbing bellows 2 are as follows in table 1:
TABLE 1
H i For the height of the individual tubes, Δ H is the height difference between the tubes, the diameter D of the base circle of the individual tubes is 40mm, and the wall thickness T is 2mm.
In this embodiment, the energy absorbing bellows 2 is fixed in the inner cavity 31 by welding.
The energy-absorbing bellows 2 selected in this embodiment has a weak structure at the peak and valley positions of the sinusoidal curve of the side wall, and can be used as a deformation inducing structure, so that the time sequence of the deformation of the pipe fitting can be controlled by controlling the positions of the peak and valley positions of the pipe fitting, as shown in fig. 6, that is, each pipe is given with appropriate different heights and ripple phases, and because the pipe fittings have different configuration characteristics, the deformation starting time and the duration time of each pipe fitting wrinkle in the compression process are different, so that a certain time sequence difference is generated between load-displacement curves of each pipe fitting, that is, the peak load of each pipe is sufficiently separated.
As shown in fig. 5, which is a graph of the compression phase of a typical bellows, the peak load on the load-displacement curve is closely related to the corrugation forming process, and each deformed corrugation means that the load curve has corresponding wave peak and wave trough values. Because the configuration characteristics of the energy-absorbing corrugated pipe 2 are directly related to the deformation process of the folds, the proper configuration characteristics given to the energy-absorbing corrugated pipe 2 obviously can achieve the purpose of controlling the peak load of the energy-absorbing pipe fitting to form a time sequence according to actual requirements, the research of the existing multi-pipe combined energy-absorbing device is mainly developed based on the same configuration, and the load curves of all the energy-absorbing corrugated pipes 2 are completely overlapped in the combined energy-absorbing process. Although the energy dissipation capacity of the whole device is obviously improved after direct combination application, the initial peak value and subsequent load fluctuation of the combined structure are also obviously increased along with the number of the pipe fittings, and the stable dissipation of the impact kinetic energy is obviously not facilitated.
Fig. 7 shows a load-displacement diagram of each pipe when only a height difference configuration is introduced, and it can be found that although a certain timing difference is formed between initial peak loads of each pipe, the subsequent peak loads of each pipe still have a significant overlapping phenomenon, and obviously the goal of small load fluctuation cannot be achieved.
Figure 8 shows the load-displacement diagram for each tubular with only the introduction of the corrugation profile phase difference configuration and it can be seen that the initial peak loads of the tubes overlap completely although the subsequent peak loads of the tubes are effectively separated, and it is clearly difficult to achieve the small initial peak loads.
Fig. 9 shows a load-displacement diagram of each pipe when a height difference and a ripple phase difference are introduced simultaneously, and it can be found that all peak loads of each pipe are sufficiently separated, and the subsequent load fluctuation of the combined structure can be reduced to the maximum extent while a small initial load peak value is maintained.
Fig. 10 shows the comparison of the six-tube combined energy absorber with different configuration according to the present invention with the conventional six-tube combined energy absorber with the same configuration, and it can be seen that the initial peak load and the load fluctuation are both significantly reduced without substantially reducing the energy absorption of the energy absorber, which is obviously more beneficial for protecting the safety of passengers.
FIG. 11: the impact force performance comparison of the conventional six-tube energy absorption device with the same configuration and the six-tube energy absorption device with different configurations of the invention is shown by specific data, wherein P is 1 Is the initial peak load, E d Is energy absorption, SEA is specific energy absorption, fm is average load, FLU 0-100 Is a load fluctuation. Specific data comparison shows that compared with the traditional six-tube energy absorption device with the same configuration, the six-tube energy absorption device with different configurations has the energy absorption E d When the initial peak load P is reduced by only 5.43% and is reduced by only 3.72% compared with the energy absorption SEA 1 Reduced by 28.76%, and the load fluctuation FLU 0-100 The reduction is 65.74%.
In the embodiment, only the working condition of energy absorption of the combination of six energy absorption corrugated pipes 2 with different configurations is provided, and of course, the number i of the pipe fittings and the initial height H of the pipe fittings can be reasonably adjusted subsequently 0 Height difference delta H, amplitude A and phase of ripple curve
The structural parameters such as the frequency a and the like are adapted to various complex application scenarios, so that the design goal of reducing the initial peak load and the subsequent load fluctuation of the combined structure to the maximum extent under the condition of meeting the energy dissipation capacity is realized.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (5)
1. A multi-tube combined energy absorber device having different heights and corrugation phases, characterized in that: the energy-absorbing corrugated pipe comprises a thin-wall shell (3) with an inner cavity (31), a plurality of energy-absorbing corrugated pipes (2) arranged in the inner cavity (31), and a front end plate (1) covering the inner cavity (31), wherein the energy-absorbing corrugated pipes (2) have different heights;
the ripple curve of the side wall of each energy-absorbing corrugated pipe (2) meets the requirement
Wherein i is the serial number of the energy-absorbing corrugated pipe (2); wave crests and wave troughs are formed on the side walls of the energy-absorbing corrugated pipes (2), and the wave crests and the wave troughs between every two adjacent energy-absorbing corrugated pipes (2) are arranged in a staggered mode.
2. A multi-tube combined energy absorber device of claim 1 having different heights and corrugation phases, wherein: a plurality of energy absorption corrugated pipes (2) are arranged in the inner cavity (31) from high to low or from low to high in an equidistant arrangement mode.
3. A multi-tube modular energy absorber apparatus of claim 1 having different heights and corrugation phases, wherein: the corrugated energy absorption pipes are arranged in the inner cavity (31) in a plurality of rows.
4. A multi-tube combined energy absorber device of claim 1 having different heights and corrugation phases, wherein: the energy-absorbing corrugated pipe (2) is fixed in the inner cavity (31) through welding.
5. A multi-tube combined energy absorber device of claim 1 having different heights and corrugation phases, wherein: the diameter of the bottom of the energy-absorbing corrugated pipe (2) is 40mm, and the wall thickness is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211167260.9A CN115447629A (en) | 2022-09-23 | 2022-09-23 | Multi-tube combined energy absorption device with different heights and ripple phases |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211167260.9A CN115447629A (en) | 2022-09-23 | 2022-09-23 | Multi-tube combined energy absorption device with different heights and ripple phases |
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| CN115447629A true CN115447629A (en) | 2022-12-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116066496A (en) * | 2023-01-10 | 2023-05-05 | 广州大学 | Energy-absorbing pipe with curved surface is crease in advance |
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2022
- 2022-09-23 CN CN202211167260.9A patent/CN115447629A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116066496A (en) * | 2023-01-10 | 2023-05-05 | 广州大学 | Energy-absorbing pipe with curved surface is crease in advance |
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