Real-time and reliable parking control method for freight train derailment

A technology for freight trains and control methods, which is applied in railway braking systems, railway signaling and safety, etc., can solve the problems of missed or misjudged mechanical alarm devices, setting of control devices, and affecting the accurate judgment or normal operation of train derailment.

Inactive Publication Date: 2016-02-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the mechanical alarm devices cut off the main air duct by touching the rails, and the installation position and coverage of the contact devices are to ensure that the device can be accurately connected to the rails at the first time when the train wheels are derailed. Touch is the key, and at the same time, the narrow space at the bottom of the rolling stock also restricts the installation of the device
So far, in the mechanical alarm technology, the setting of the installation position of the touch device is mostly determined by people's experience, and it is impossible to realize the real-time control of the vehicle braking system, which leads to the fact that the mechanical alarm device often misses the judgment in actual use. Or the situation of misjudgment seriously affects the accurate judgment or normal operation of the train derailment; as the 2nd and 3rd patents, wherein the 2nd patent mentions that the air pipe should be suspended at an appropriate position above the rails, which has not been seen so far. Report on the minimum size of the wheel derailment detection device and its proper installation position in the narrow space at the bottom of the vehicle

Method used

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  • Real-time and reliable parking control method for freight train derailment
  • Real-time and reliable parking control method for freight train derailment
  • Real-time and reliable parking control method for freight train derailment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0214] Embodiment 1, taking the flood disaster as an example

[0215] Solving the space vibration equation of the train-track system, Equation (10), because the flood disaster only exists damage to the track structure, most of which are reflected in the under-rail foundation being washed away by the flood, that is, the support of the lower part of the rail row in the track structure fails; therefore, the In the track model, the spring coefficient and damping coefficient in all directions of the ballast bed are set to 0, that is, K1, K2, K3, C1, C2, and C3 are all 0; Under unfavorable working conditions, the lateral displacement y of the bogie at time t of Δz=25mm is obtained t =-69.4mm and the lateral displacement V of the corresponding position of rail I or steel pair II and bogie Ι,ΙΙ =-8.6mm, using sine function to simulate track lateral irregularity data y ior=-2.6mm, according to Δ tt =y t -V Ι,ΙΙ -y ior Get the lateral relative displacement of bogie and rail Δ tt ...

Embodiment 2

[0217] Embodiment 2, take landslide as example

[0218] The impact of landslides on freight trains is manifested in the impact of foreign objects such as sand, gravel, and soil on the carriages of the trains, causing derailment of the trains, and exerting a lateral force F on the freight train body. HP = 350kN, solve the space vibration equation of the train-track system, formula (10), and get the lateral displacement y of the bogie at the time t of Δz=25mm t =-73.3mm and the lateral displacement V of the corresponding position of rail I or steel pair II and bogie Ι,ΙΙ =-5.2mm, using sine function to simulate track lateral irregularity data y ior =3.1mm, according to Δ tt =y t -V Ι,ΙΙ -y ior Get the lateral relative displacement of bogie and rail Δ tt =71.2mm ("-" means opposite to the coordinate direction);

[0219] A train wheel derailment detection device is installed on the vehicle bogie, and the train wheel derailment detection device controls the vehicle braking s...

Embodiment 3

[0220] Embodiment 3, take the gale disaster as an example

[0221] The impact of strong winds on freight trains is often manifested as overturning, blowing over or derailing accidents on freight trains. The environmental conditions of strong winds are: the instantaneous wind speed reaches 17m / s, and the maximum wind speed within the calibrated wind speed range of 8 to 10 is selected for calculation; - The spatial vibration equation of the track system, formula (10), obtains the lateral displacement y of the bogie at the time t of Δz=25mm t =-92.2mm and the lateral displacement V of the corresponding position of rail I or steel pair II and the bogie Ι,ΙΙ =-8.2mm, using sine function to simulate track lateral irregularity data y ior =3.3, according to Δ tt =y t -V Ι,ΙΙ -y ior Get the lateral relative displacement of bogie and rail Δ tt =87.3mm ("-" means opposite to the coordinate direction);

[0222] A train wheel derailment detection device is installed on the vehicle b...

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Abstract

The invention discloses a control method for real-time and reliable parking of a derailed freight train. According to the method, based on the train derailment energy stochastic analysis theory, various typical derailment conditions for explicit reasons are simulated, and calculation models on all kinds of typical reason conditions are established; calculation of the whole derailment process of the freight train on all kinds of explicit reason conditions is realized, the wheel-rail contact state, wheel-rail relative positions, dimensional relations and the like at the moment of derailment of the freight train on the explicit reason conditions are summarized comprehensively, and key data such as wheel suspension capacity and transverse relative displacement of steel rails are obtained; as a result, the minimum size and the installation position of a wheel derailment detection device of the freight train are determined, it is ensured that the device can overcome the influence caused by a narrow space of the bottom of the train and can also accurately make contact with the steel rails immediately when the train derails, a braking system of the train is controlled to work in real time, and timely parking is achieved. The method can provide an important theoretical basis and reasonable basic data for research and development of mechanical and electronic train wheel derailment detection devices.

Description

technical field [0001] The invention relates to a real-time and reliable parking control method for freight train derailment, in particular to a real-time and reliable parking control method for freight train derailment based on the wheel-rail contact state and its relative position. The invention belongs to the technical field of train safety control. Background technique [0002] With the development of heavy-haul railway transportation, the axle load of freight trains is increasing, the number of marshalling vehicles is increasing, and the driving speed is gradually increasing. Safety issues have become the top priority. In traffic accidents, train derailment is the most important hidden danger affecting safety. According to the statistics of the former Ministry of Railways in 1998, in all the major and major accidents in the past ten years, the proportion of train derailment was as high as about 70%. The derailment of the train caused great damage to people's life and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61L23/00B61H11/00
Inventor 向俊龚凯
Owner CENT SOUTH UNIV
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