Method for continuously processing wheel-track force of track vehicle by means of ground test

Abstract

The invention discloses a method for continuously processing wheel-track force of a track vehicle by means of a ground test, which comprises the steps of: A, acquiring wheel-track force test data and corresponding time data of a wheel pair passing through a track test area by means of a track ground test, removing the data smaller than a threshold value to form waveform data which is mutually separated, and then picking out the maximal value in each waveform data to obtain discrete wheel-track force data and time data thereof; B, training a radial group neutral network of a single hidden layer by using the discrete wheel-track force data and the time data thereof to ensure that the radial group neutral network reaches a set precision; and C, with the time ranging from 0.0005 to 0.001 seconds as the step length, inputting the time data and performing simulative calculation by the neutral network to obtain the continuous wheel-track force data to further obtain the continuous wheel-track force of the track vehicle passing through the track test area by means of a test. The method can be used for obtaining the continuous wheel-track force by means of the test, acquiring the wheel-track forces at all positions, and detecting the safe operation state of the wheel pair more effectively in order to evaluate the traveling safety of the vehicle more reliably.

Description

technical field [0001] The invention relates to a method for testing the wheel-rail force of a railway vehicle. Background technique [0002] With the rapid development of heavy-haul railways and high-speed railways, the wheel-rail dynamic interaction force (referred to as wheel-rail force) directly affects the running quality of railway rolling stock and wheel-rail wear, and is one of the main factors affecting the safety status of railway trains. It is also one of the performance indicators that need to be monitored in the process of train operation. [0003] The existing wheel-rail force test methods can be divided into two types: track ground test and dynamometric wheel set test. The track ground test is to set up a test area on the railway track, install the sensor on the rail, and then collect the force between the wheel set and the rail through the sensor. This is a method to obtain the wheel-rail force based on the strain of the rail; The force wheel set test is to...

AI Technical Summary

Problems solved by technology

However, in the track test, the arrangement points of the sensors are fixed and limited. When the wheel set rotates a picture, usually only the discrete wheel-rail force values ​​of 4-15 fixed points can be measured, and it is impossible to obtain the wheel set passing through other positions. (or time point) wheel-rail force

In this way, the measured wheel-rail force has discrete characteristics, not a continuous change.

Since the wheel-rail force at certain positions (or time points) is unknown, the wheel-rail force information obtained by this method has very obvious limitations in evaluating the safety of vehicle operation, so it is impossible to accurately detect the safe operation status of the wheel set.

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