A segmented guiding and controlling energy-absorbing tube and energy-absorbing method thereof
An energy-absorbing tube and round tube technology, which is used in railway car body parts, transportation and packaging, railway vehicle wheel guards/buffers, etc., can solve problems such as low load efficiency, and achieve improved energy absorption characteristics, uniform and stable load, Damage reduction effect
Active Publication Date: 2022-04-22
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0013] The object of the present invention is to provide a segmented guiding and controlling energy-absorbing tube and energy-absorbing method, which can collapse and fold more regularly and orderly during the collision process, which can solve the problem that the energy-absorbing tube in the prior art can only unilaterally increase the specific energy absorption, Or the problem of only reducing the peak force but causing low load efficiency, so that in the energy-absorbing structure at the end of the rail vehicle body, the passive safety protection performance of the vehicle can be improved
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[0039] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0040] figure 1 It is a structural schematic diagram of a segmented energy-absorbing tube with a folded structure (the section of the guiding section is square).
[0041] figure 1 It is an embodiment to determine the overall structural form of the energy-absorbing tube. exist figure 1 Among them, reference sign a represents the folding structure, which is called "guiding segment"; reference mark c represents the main energy-absorbing segment, which is called "circular pipe segment"; reference mark b represents the connecting part between the folding structure and the circular pipe, through similar The "lofting" method of 3D modeling generates a transitional surface based on the cross-sectional geometry of sections a and b, which is called a "transition section".
[0042] The energy-absorbing tube of the present invention is generally composed of the...
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A segmented guided energy-absorbing pipe, characterized in that the energy-absorbing pipe sequentially includes a guide section, a transition section, and a round pipe of equal cross-section, wherein the guide section is connected to the transition section; the transition section is connected to the transition section The circular pipes of equal cross-section are connected; the guide section is arranged at one end of the transition section; , a regular hexagon or a circle; or, the guide segment has a folded structure; the transition segment is geometrically smoothly connected to the guide segment at the one end, and the transition segment is connected to the equal cross-sectional circle at the other end The tubes are geometrically smooth connected. According to the present invention, the problem that the energy-absorbing tube in the prior art can only unilaterally increase the specific energy absorption, or only reduce the peak force but lead to low load efficiency can be solved, so that in the energy-absorbing structure at the end of the rail vehicle body, the vehicle's performance can be improved. Passive safety protection performance.
Description
technical field [0001] The invention relates to an energy-absorbing device for absorbing huge energy generated during a rail vehicle collision, in particular to a segmented guiding and controlling energy-absorbing tube, which belongs to the technical field of rail vehicle passive safety. Background technique [0002] When a rail vehicle collides with an accident, huge energy will be generated, and its transmission and dissipation methods directly affect the life safety of the passengers. As the operating speed of rail vehicles continues to increase, the requirements for their passive safety performance are also getting higher and higher. [0003] As a passive safety protection device widely used in response to train collisions, energy-absorbing tubes are mainly distributed at the front end of the rail vehicle and both ends of the intermediate vehicle. The energy-absorbing tubes in the prior art are generally thin-walled metal tube structures. The main principle is to absorb...
Claims
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IPC IPC(8): B61F19/04
CPCB61F19/04
Inventor 窦伟元阮宝锋张乐乐
Owner BEIJING JIAOTONG UNIV