Vehicle part vibration characteristic obtaining method in train derailment behavior process

A vehicle component and acquisition method technology, applied in the direction of instruments, electrical digital data processing, geometric CAD, etc., can solve the problems of high cost, limited derailment of test, and high potential risk of experiment, and achieve the effect of low cost

Pending Publication Date: 2020-07-17
CHENGDU YUNDA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing derailment test bench can only carry out the derailment experiment of a single bogie or a

Method used

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  • Vehicle part vibration characteristic obtaining method in train derailment behavior process
  • Vehicle part vibration characteristic obtaining method in train derailment behavior process
  • Vehicle part vibration characteristic obtaining method in train derailment behavior process

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0084] Example 1: Imitation example of Puyuma train derailment

[0085] According to the vehicle’s inertial parameters, geometric parameters, wheel-rail parameters, etc., a simplified train 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;

[0086] The orbital excitation of the model is set to American Class 5 spectrum (AAR5). In the vehicle multi-body dynamics model, virtual sensors are set for the wheelset and the bogie. Each virtual sensor can collect acceleration, angular acceleration, speed, rotation speed, displacement and rotation angle of 6 degrees of freedom. The sampling frequency of the virtual sensor is 2kHz;

[0087] Set the gauge to the standard gauge mode (1.435m), and set the track irregularity level to the American Class 5 spectrum (AAR5). The line is set to curve conditions: the radius of the curve is 300m, the length of the transition curve is 1...

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Abstract

The invention discloses a method for acquiring vibration characteristics of a vehicle part in a train derailment behavior process, and solves the problems that an existing derailment experiment benchcan only carry out a derailment experiment of a single bogie or a single wheel set, and has the limitations of high cost, high experiment potential risk, limited testable derailment condition, lower test speed and the like. The method comprises the steps that a train dynamic model is established, target operation environment information is set, and the model operation state is adjusted according to research abnormal operation conditions; and performing simulation analysis to obtain simulation data. According to the method, the train derailment condition caused by rail abnormity is simulated through a mechanical part dynamics simulation analysis method. Compared with a bench derailment experiment and a line derailment experiment, the method is very low in cost, almost has no risk, and doesnot cause any casualties and equipment damage.

Description

technical field [0001] The invention relates to the field of train tracks, in particular to a method for acquiring vibration characteristics of vehicle components during train derailment. Background technique [0002] Preventing train derailment is an eternal research topic in the field of rail transit. Although experts in the industry have carried out long-term and extensive scientific research work in this field, the current level of science and technology cannot fully guarantee that trains will not have derailment accidents. [0003] Abnormal train operation is one of the main factors leading to train derailment. Abnormal train operation includes train overspeed, abnormal traction braking of train, inappropriate emergency braking, etc. Derailment of trains due to abnormal operation occurs from time to time: for example, on October 21, 2018, the train derailment accident (rollover and derailment) caused by the Puyuma train passing through the overspeed curve in Taiwan Pro...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/20G06F119/14
Inventor 李春胜杜红梅李夫忠唐彬
Owner CHENGDU YUNDA TECH CO LTD
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