CN107719406B - Hierarchical energy-absorbing structure and rail vehicle - Google Patents
Hierarchical energy-absorbing structure and rail vehicle Download PDFInfo
- Publication number
- CN107719406B CN107719406B CN201710979134.6A CN201710979134A CN107719406B CN 107719406 B CN107719406 B CN 107719406B CN 201710979134 A CN201710979134 A CN 201710979134A CN 107719406 B CN107719406 B CN 107719406B
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- cross beam
- end cross
- energy
- rear end
- energy absorbing
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention relates to the technical field of railway vehicles and discloses a hierarchical energy absorption structure which comprises a front end cross beam, a rear end cross beam, a middle longitudinal beam and side beams; the front end cross beam and the rear end cross beam are arranged in parallel, two ends of the front end cross beam are respectively connected with two ends of the rear end cross beam through side beams, two ends of the middle longitudinal beam are vertically connected with the inner side of the front end cross beam and the inner side of the rear end cross beam, the middle cross beam is arranged between the front end cross beam and the rear end cross beam in parallel and is connected with the middle longitudinal beam, a plurality of energy absorption tubes which are arranged in parallel with the middle longitudinal beam are arranged at intervals on two sides of the middle longitudinal beam, and two ends of each energy absorption tube are respectively connected with the rear end cross beam and the middle cross beam; the middle longitudinal beam and the side beam form a primary energy absorption structure, the energy absorption pipe forms a secondary energy absorption structure, and the joint of the energy absorption pipe and the middle cross beam is filled with an energy absorption honeycomb structure to form a tertiary energy absorption structure. The invention also discloses a railway vehicle. The invention can gradually reduce the impact kinetic energy and has good energy absorption effect.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a hierarchical energy absorption structure and a railway vehicle.
Background
The rail transit is taken as a modern transportation means which is rapid, large in capacity, wide in coverage, low in transportation cost, comfortable and convenient, brings convenience to life of people, and brings great threat and harm to life and property of people due to traffic accidents caused by the rail transit.
The development of the energy absorbing element of the railway vehicle is started to reduce the damage of train accidents, the energy absorbing component is utilized to absorb energy in the collision process to ensure the life and property safety of passengers, and at present, the development of an energy absorbing structure with good energy absorbing effect is needed.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a grading type energy-absorbing structure which gradually reduces impact kinetic energy and is controllable in deformation so as to protect passengers to the greatest extent.
(II) technical scheme
In order to solve the technical problems, the invention provides a hierarchical energy absorbing structure, which comprises a front end cross beam, a rear end cross beam, a middle longitudinal beam and side beams;
the front end cross beam and the rear end cross beam are arranged in parallel, two ends of the front end cross beam are respectively connected with two ends of the rear end cross beam through side beams, two ends of the middle longitudinal beam are vertically connected with the inner side of the front end cross beam and the inner side of the rear end cross beam, the middle cross beam is arranged between the front end cross beam and the rear end cross beam in parallel and is connected with the middle longitudinal beam, a plurality of energy absorption pipes which are arranged in parallel are arranged on two sides of the middle longitudinal beam at intervals, and two ends of each energy absorption pipe are respectively connected with the rear end cross beam and the middle cross beam; the middle longitudinal beam and the side beams form a primary energy-absorbing structure, the energy-absorbing pipe forms a secondary energy-absorbing structure, and the joint of the energy-absorbing pipe and the middle cross beam is filled with an energy-absorbing honeycomb structure to form a tertiary energy-absorbing structure.
Wherein the energy absorption tube adopts a thin-wall metal square tube.
The connecting beam is arranged between the rear end beam and the middle beam in parallel, and two ends of the connecting beam are respectively connected with the inner sides of the side beams.
The energy absorption pipe is connected with the connecting beam, and the joint of the energy absorption pipe and the connecting beam is also filled with an energy absorption honeycomb structure.
The length of the front end cross beam is shorter than that of the rear end cross beam, and the front end cross beam is connected with the rear end cross beam and the side beams on two sides to form an isosceles trapezoid frame structure.
The middle longitudinal beams are symmetrically arranged relative to the central axis of the isosceles trapezoid frame structure.
The energy absorbing pipe is characterized in that gaps are reserved between two ends of the middle cross beam and the corresponding side beams, stop ends are arranged at positions, opposite to the energy absorbing pipe, of the inner side of the front end cross beam in a one-to-one correspondence mode, and buffer gaps are reserved between the front end of the middle cross beam and the stop ends.
The connection parts of the side beams and the front end cross beam and the connection parts of the middle longitudinal beam and the front end cross beam are respectively provided with an induction deformation groove.
Wherein, the energy absorption honeycomb structure is an aluminum honeycomb structure.
The invention also provides a railway vehicle which comprises the grading type energy absorbing structure.
(III) beneficial effects
Compared with the prior art, the invention has the following advantages:
the invention provides a hierarchical energy-absorbing structure and a railway vehicle, wherein the hierarchical energy-absorbing structure comprises a front end cross beam, a rear end cross beam, a middle longitudinal beam and side beams; the front end cross beam and the rear end cross beam are arranged in parallel, two ends of the front end cross beam are respectively connected with two ends of the rear end cross beam through side beams, two ends of the middle longitudinal beam are vertically connected with the inner side of the front end cross beam and the inner side of the rear end cross beam, the middle cross beam is arranged between the front end cross beam and the rear end cross beam in parallel and is connected with the middle longitudinal beam, a plurality of energy absorption pipes which are arranged in parallel are arranged on two sides of the middle longitudinal beam at intervals, and two ends of each energy absorption pipe are respectively connected with the rear end cross beam and the middle cross beam; the middle longitudinal beam and the side beam are plastically deformed to form a primary energy absorption structure, the energy absorption tube adopts a thin-wall tube to form a secondary energy absorption structure, and the joint of the energy absorption tube and the middle cross beam is filled with an energy absorption honeycomb structure to form a tertiary energy absorption structure; the overall strength of each stage of structure can be changed by changing the thickness of each stage of thin-wall pipe and the strength of the honeycomb structure, and the mode of stepwise compression is adopted, so that the impact kinetic energy is gradually reduced. The structural strength is continuously enhanced, so that the structural strength is weaker when the impact kinetic energy is larger, and then the structural strength is gradually enhanced, thereby protecting the safety of passengers to the greatest extent.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a hierarchical energy absorbing structure according to an embodiment of the present invention;
in the figure: 1: a front end cross beam; 2: a rear end cross beam; 3: a middle cross beam; 4: a middle longitudinal beam; 5: edge beams; 6: a connecting beam; 7: an energy absorption tube; 8: an energy absorbing honeycomb structure; 9: a stop end; 10: inducing deformation grooves.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.
As shown in fig. 1, a hierarchical energy absorbing structure provided in an embodiment of the present invention includes a front end beam 1, a rear end beam 2, a middle beam 3, a middle longitudinal beam 4 and a side beam 5;
the front end cross beam 1 and the rear end cross beam 2 are arranged in parallel, two ends of the front end cross beam 1 are respectively connected with two ends of the rear end cross beam 2 through side beams 5, two ends of the rear end cross beam 2 extend outwards to form a section, two ends of the middle longitudinal beam 4 are vertically connected with the inner side of the front end cross beam 1 and the inner side of the rear end cross beam 2, the middle cross beam 3 is arranged between the front end cross beam 1 and the rear end cross beam 2 in parallel and is connected with the middle longitudinal beam 4, gaps are reserved between two ends of the middle cross beam 3 and the corresponding side beams 5, a plurality of energy absorption tubes 7 are arranged at intervals on two sides of the middle longitudinal beam 4 in parallel, in the embodiment of the invention, two energy absorption tubes 7 are respectively arranged on two sides of the middle longitudinal beam 4 at equal intervals, and two ends of the energy absorption tubes 7 are respectively connected with the rear end cross beam 2 and the middle cross beam 3; the middle longitudinal beam 4 and the side beam 5 form a primary energy absorption structure, the plastic compression deformation of the side beam 5 and the middle longitudinal beam 4 is mainly relied on, the energy absorption tube 7 forms a secondary energy absorption structure, the energy absorption tube 7 adopts a thin-wall metal square tube for secondary energy absorption, and the joint of the energy absorption tube 7 and the middle cross beam 3 is filled with an energy absorption honeycomb structure 8 to form a tertiary energy absorption structure. The overall strength of each stage of structure can be changed by changing the thickness of each stage of thin-wall pipe and the strength of the honeycomb structure, and the mode of stepwise compression is adopted, so that the impact kinetic energy is gradually reduced. The structural strength is weaker when the impact kinetic energy is larger, and then the structural strength is gradually enhanced, so that the safety of passengers is protected to the greatest extent.
In order to enhance the strength of the rear end cross beam 2, the invention further comprises a connecting cross beam 6 arranged close to the rear end cross beam 2, wherein the connecting cross beam 6 is arranged between the rear end cross beam 2 and the middle cross beam 3 in parallel, and two ends of the connecting cross beam 6 are respectively connected with the inner sides of the side beams 5.
Specifically, the energy absorption tube 7 is connected with the connecting beam 6, and the connection part of the energy absorption tube 7 and the connecting beam 6 is also filled with an energy absorption honeycomb structure 8, specifically an aluminum honeycomb structure.
In order to ensure uniform force level, the length of the front end cross beam 1 is shorter than that of the rear end cross beam 2, the front end cross beam 1 is connected with the rear end cross beam 2 and side beams 5 on two sides to form an isosceles trapezoid frame structure, and the middle longitudinal beam 4, the side beams 5, the front end cross beam 1 and the rear end cross beam 2 bear the supporting function of the whole structure. The front end beam 1 is stressed first to play a guiding role.
The middle longitudinal beams 4 comprise two middle longitudinal beams 4, and the two middle longitudinal beams 4 are symmetrically arranged relative to the central axis of the isosceles trapezoid frame structure.
In order to enhance stability, stop ends 9 are arranged at positions, opposite to the energy absorption tubes 7, of the inner side of the front end beam 1 in a one-to-one correspondence manner, and a buffer gap is reserved between the front end of the middle beam 3 and the stop ends 9.
The connection between the side beam 5 and the front end cross beam 1 and the connection between the middle longitudinal beam 4 and the front end cross beam 1 are respectively provided with an induction deformation groove 10. Because the structure adopts a hierarchical energy absorption mode, the initial strength of the structure after collision is smaller, and the initial induction deformation groove 10 is preset, the initial peak value is not too large, and the overall energy absorption amount of the structure is not influenced.
The invention also provides a railway vehicle which comprises the grading type energy absorbing structure, wherein the grading type energy absorbing structure is arranged at the bottom of a cab of the railway vehicle and at least one end of the bottom of each carriage. By adopting the hierarchical energy-absorbing structure, a hierarchical gradual compression mode is formed, so that impact kinetic energy is gradually reduced, and safety of passengers is furthest protected.
The embodiment of the invention can be seen that the method adopts a grading energy absorption mode, so that the overall strength of the structure is higher, but the initial strength of the structure after collision is smaller, the preset induction deformation groove can not generate a too large initial peak value, the implementation mode of the overall energy absorption of the structure can not be influenced, and the energy absorption effect is good.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The hierarchical energy absorbing structure is characterized by comprising a front end cross beam, a rear end cross beam, a middle longitudinal beam and side beams;
the front end cross beam and the rear end cross beam are arranged in parallel, two ends of the front end cross beam are respectively connected with two ends of the rear end cross beam through side beams, two ends of the middle longitudinal beam are vertically connected with the inner side of the front end cross beam and the inner side of the rear end cross beam, the middle cross beam is arranged between the front end cross beam and the rear end cross beam in parallel and is connected with the middle longitudinal beam, a plurality of energy absorption pipes which are arranged in parallel are arranged on two sides of the middle longitudinal beam at intervals, and two ends of each energy absorption pipe are respectively connected with the rear end cross beam and the middle cross beam; the middle longitudinal beam and the side beams form a primary energy-absorbing structure, the energy-absorbing pipe forms a secondary energy-absorbing structure, and the joint of the energy-absorbing pipe and the middle cross beam is filled with an energy-absorbing honeycomb structure to form a tertiary energy-absorbing structure.
2. The hierarchical energy absorbing structure of claim 1 wherein the energy absorbing tube is a thin walled metal square tube.
3. The hierarchical energy absorbing structure of claim 1, further comprising a connecting beam disposed in parallel between the rear end beam and the intermediate beam, wherein two ends of the connecting beam are respectively connected to the inner sides of the side beams.
4. A hierarchical energy absorbing structure according to claim 3 wherein the energy absorbing tube is connected to the connecting beam and the connection of the energy absorbing tube to the connecting beam is also filled with an energy absorbing honeycomb structure.
5. The hierarchical energy absorbing structure of claim 1, wherein the front end beam has a length shorter than the rear end beam, the front end beam being connected to the rear end beam and the side beams on either side to form an isosceles trapezoid frame structure.
6. The hierarchical energy absorbing structure of claim 5 wherein the intermediate stringers comprise two, the two intermediate stringers being symmetrically disposed about a central axis of the isosceles trapezoid frame structure.
7. The hierarchical energy absorbing structure of claim 1, wherein gaps are left between two ends of the middle cross beam and the corresponding side beams, stop ends are arranged on the inner side of the front end cross beam and at positions opposite to the energy absorbing tubes in a one-to-one correspondence manner, and buffer gaps are left between the front ends of the middle cross beam and the stop ends.
8. The hierarchical energy absorbing structure of claim 1, wherein the connection of the side rail and the front end cross beam and the connection of the intermediate side rail and the front end cross beam are each provided with an induced deformation groove.
9. The hierarchical energy absorbing structure of claim 1 or 4, wherein the energy absorbing honeycomb is an aluminum honeycomb.
10. A rail vehicle comprising a hierarchical energy absorbing structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979134.6A CN107719406B (en) | 2017-10-19 | 2017-10-19 | Hierarchical energy-absorbing structure and rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710979134.6A CN107719406B (en) | 2017-10-19 | 2017-10-19 | Hierarchical energy-absorbing structure and rail vehicle |
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| Publication Number | Publication Date |
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| CN107719406A CN107719406A (en) | 2018-02-23 |
| CN107719406B true CN107719406B (en) | 2023-10-27 |
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| CN201710979134.6A Active CN107719406B (en) | 2017-10-19 | 2017-10-19 | Hierarchical energy-absorbing structure and rail vehicle |
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| CN (1) | CN107719406B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111806504A (en) * | 2020-07-22 | 2020-10-23 | 中南大学 | Combined type of rail vehicle is energy-absorbing structure step by step |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2275706T3 (en) * | 2000-08-28 | 2007-06-16 | Mitsubishi Heavy Industries, Ltd. | BODY STRUCTURE. |
| DE10126483A1 (en) * | 2001-05-31 | 2002-12-05 | Scharfenbergkupplung Gmbh & Co | Energy consumption device for the front of rail vehicles |
| US7810437B2 (en) * | 2007-09-05 | 2010-10-12 | Voith Patent Gmbh | Shock absorber for the front or rear region of a railborne vehicle having at least one energy absorption device |
-
2017
- 2017-10-19 CN CN201710979134.6A patent/CN107719406B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008034745A1 (en) * | 2006-09-18 | 2008-03-27 | Bombardier Transportation Gmbh | Head module for a rail vehicle |
| CN102741106A (en) * | 2010-02-11 | 2012-10-17 | 奥地利西门子公司 | Crash module for a rail vehicle |
| CN102267472A (en) * | 2011-05-10 | 2011-12-07 | 上海磁浮交通发展有限公司 | Energy-absorbing and impact-preventing device for high-speed maglev train |
| CN103909948A (en) * | 2014-04-08 | 2014-07-09 | 唐山轨道客车有限责任公司 | Rail vehicle energy-absorbing device |
| CN106004917A (en) * | 2016-05-13 | 2016-10-12 | 北京交通大学 | Multistage collision energy absorption rail guard |
| CN106114547A (en) * | 2016-06-28 | 2016-11-16 | 中车唐山机车车辆有限公司 | Energy absorption device and rail vehicle |
| CN106379365A (en) * | 2016-09-22 | 2017-02-08 | 中车南京浦镇车辆有限公司 | Mounting structure for subway anti-creeper |
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| CN107719406A (en) | 2018-02-23 |
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