Experimental Analysis of Vertical Vibrations of a Railway Bogie

Mădălina Dumitriu,Ioan Cristian Cruceanu

doi:10.26552/com.c.2021.4.b299-b307

Mădălina Dumitriu, Ioan Cristian Cruceanu

Open Access

https://doi.org/10.26552/com.c.2021.4.b299-b307

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Abstract

The paper presents a study of the vertical vibrations of a bogie of a passenger vehicle, based on the acceleration of the axles and the bogie frames, measured during the running at a constant velocity. To this purpose, the root mean square (RMS) acceleration is calculated for more measurement sequences at different velocities. In principle, the RMS acceleration increases along with the velocity and influence of the variability of the amplitude in the track defects upon the dispersion of the values in the RMS acceleration. Based on the spectral analysis of the measured acceleration, wheel defects and undulatory wear of the rolling surfaces of wheels and rail are highlighted.

Highlights

The railway vehicle is subjected to a permanent vibration regime, with adverse effects on the ride quality, ride comfort, integrity of the goods and traffic safety [1]
This paper presents an analysis of the vertical vibrations of a bogie in a rail passenger vehicle, based on the experimental results obtained by measurements done during the running on a current track, on a doubletrack section in alignment and vertical alignment
The results showed the fact that the root mean square (RMS) acceleration are circa twice higher in the axles than in the bogie frame

Summary

Introduction

The railway vehicle is subjected to a permanent vibration regime, with adverse effects on the ride quality, ride comfort, integrity of the goods and traffic safety [1]. The track features as a whole, on the one hand, many deviations from the ideal geometrical shape and, on the other hand, defects of the rolling surfaces of the rails These two above, along with the constructive discontinuities of the rail, make up for the major causes of railway vehicle vibrations [9,10,11,12,13,14]. This paper presents an analysis of the vertical vibrations of a bogie in a rail passenger vehicle, based on the experimental results obtained by measurements done during the running on a current track, on a doubletrack section in alignment and vertical alignment. The spectral analysis of the measured acceleration is done, which helps with e identification of a series of defects in the wheels and the rolling surfaces of the rail and wheels

Measurements of the vertical acceleration of a bogie

Analysis of experimental results

Conclusions