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Simulation method for researching train derailment behaviors

A simulation method and technology for trains, applied in the field of simulation to study the derailment behavior of trains, can solve the problems of limited derailment, high cost, difficult problems, etc., and achieve the effects of high repeatability, many simulation conditions, and high running speed.

Pending Publication Date: 2020-07-24
CHENGDU YUNDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on the dynamic behavior of trains after derailment is still a worldwide problem
Existing derailment test benches can only be used for derailment experiments with a single bogie or a single wheel set, and there are limitations such as high cost, high potential risk of the experiment, limited derailment situations that can be tested, and low test speed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In Embodiment 1, a multi-body dynamics model of the vehicle is established according to the information of the researched vehicle. The modeling method can be self-programming or commercial software. For the convenience of explanation, the SIMPACK multi-body dynamics software is used as a case for a certain intercity train. According to the vehicle's inertial parameters, geometric parameters, wheel-rail parameters, etc., establish the corresponding multi-body dynamics model (such as figure 2 Shown). The wheel radius is set to 0.43m, the wheel set tread is LM type, the rail type is 60kg rail, and the rail bottom slope is set to 1:40. In the model, set the wheel-rail relationship as "Multipoint Contact + Elastic Contact";

[0062] According to the operating environment of the vehicle, the orbit excitation of the model is set to the American Class 5 spectrum (AAR5). In the vehicle multi-body dynamics model, arrange virtual sensors, see figure 2 Medium dark square. The ins...

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PUM

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Abstract

The invention discloses a simulation method for researching a train derailment behavior, and the method comprises the steps: carrying out the dynamic simulation of a rail vehicle system, setting a derailment condition, carrying out the simulation analysis of the train derailment behavior caused by a vehicle fault, and obtaining the vibration information of key parts of a derailed vehicle in the normal operation, derailment processes and after derailment of a train. The obtained vibration information can be used for evaluating the influence of derailment on vehicle parts, analyzing derailment harm and providing a theoretical basis for a derailment detection system. According to the method provided by the invention, the vehicle vibration characteristics under the derailment condition are obtained mainly through simulation, and compared with an experimental method, the method provided by the invention is low in cost, high in repeatability, multiple in simulative working conditions and high in simulation vehicle running speed, the derailment condition of the whole vehicle / whole train can be considered, and the risk probability is 0.

Description

Technical field [0001] The invention relates to the field of railway transportation safety monitoring, in particular to a simulation method for studying train derailment behavior. Background technique [0002] Preventing train derailment is an eternal research topic in the field of rail transit. Although industry experts have carried out long-term and large-scale scientific research in this field, the current level of technology cannot completely guarantee that trains will not have derailment accidents. According to statistics, vehicle failure is still one of the main reasons for derailment, and train derailment accidents may not always be detected by the driver in time. For example, in Australia, the driver of the head train after the unmanned freight locomotive derailed more than ten kilometers. The tail locomotive derailed. [0003] The research on the dynamic behavior of trains and wheelsets after derailment has high engineering application value. For example, the vibration c...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F119/14
CPCY02T90/00
Inventor 李春胜杜红梅李夫忠唐彬
Owner CHENGDU YUNDA TECH CO LTD
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