Method for indirectly measuring acting force between railway vehicle wheel tracks

Abstract

A method for indirectly measuring the acting force between railway vehicle wheel tracks includes the steps of measuring a vibrating signal, digitalizing the vibrating signal, calculating the transverse force of an axle and calculating the vertical force of the wheel tracks. In the step of measuring the vibrating signal, a three-direction acceleration sensor, a transverse displacement sensor, a left vertical displacement sensor and a right vertical displacement sensor are used for measuring the transverse displacement, the left vertical displacement and the right vertical displacement of a primary spring online respectively, and an inner side strain gage and an outer side strain gage are used for measuring the inner side strain and the outer side strain of an axle box rotating arm respectively. In the step of digitalizing the vibrating signal, the speed, the displacement and the strain are amplified and filtered through a signal conditioner to be converted into digits. In the step of calculating the transverse force of the axle, the transverse force H of the axle is calculated according to the transverse acceleration a[y], the transverse displacement d[y], the outer side strain epsilon[1] and the inner side strain epsilon[2]. In the step of calculating the vertical force of the wheel tracks, the vertical force P[1] of the left wheel track and the vertical force P[2] of the right wheel track are calculated according to the vertical acceleration a[z], the left vertical displacement d[z1], the right vertical displacement d[z2] and the transverse force H of the axle. Due to the method, the acting force between the wheel tracks can be indirectly measured, the result is more real and reliable, and a more reliable basis can be provided for 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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