An Indirect Measuring Method of Force Between Wheel and Rail of Railway Vehicles

Abstract

An indirect method for measuring the force between the wheels and rails of a railway vehicle, including: A. Vibration signal test: by three-way acceleration sensors, lateral displacement sensors, left and right vertical displacement sensors, respectively on-line measurement of primary springs Lateral displacement, left and right vertical displacement; inner and outer strain gauges respectively measure the inner and outer strains of the axle box arm; B. Digitization of vibration signals: the speed, displacement and strain are amplified and filtered by the signal conditioner, Converted to a number; C. Calculation of the lateral force of the wheel shaft: calculate the lateral force H of the wheel shaft according to the lateral acceleration ay, lateral displacement dy, outer strain ε1 and inner strain ε2; ​​D. Calculation of the vertical force of the wheel and rail: according to the vertical acceleration az, left vertical displacement dz1, right vertical displacement dz2 and axle lateral force H, calculate left and right wheel-rail vertical forces P1 and P2. This method can realize the indirect measurement of the wheel-rail force, the result is more real and reliable, and can provide a more reliable basis for the safety evaluation and health monitoring of railway vehicles.

Description

technical field [0001] The invention relates to an indirect measurement method for the wheel-rail force of a railway vehicle. Background technique [0002] The wheel-rail relationship is a basic and complex problem in the vehicle and track system. The force between the wheel and rail is the basis for analyzing the wheel-rail relationship. It is the basis for further evaluation of the running performance of the wheel on the track and the damage of the wheel-rail surface. In the current national standards for rolling stock dynamics, the acquisition of wheel-rail force is very important. Whether the force between wheel and rail can be accurately obtained directly affects problems such as corrugation, wear and derailment, and is an important factor for safety evaluation and health monitoring of railway vehicles. in accordance with. [0003] The existing wheel-rail force measurement methods are mainly divided into two categories: 1. The direct measurement method of wheel-rail fo...

AI Technical Summary

Problems solved by technology

However, the contact relationship between the wheel and the rail is complex and has strong nonlinear characteristics. The calculated force between the wheel and the rail has a large error and low reliability.

Using it as the basis for safety evaluation and health monitoring of railway vehicles cannot reliably guarantee the safe operation of vehicles

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