On some rotor-dynamical phenomena of high-speed trains

Roman Bogacz,Włodzimierz Kurnik

doi:10.1007/s00419-014-0966-3

Roman Bogacz, Włodzimierz Kurnik

Open Access

https://doi.org/10.1007/s00419-014-0966-3

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Abstract

The paper is devoted to radial and out-of-plane vibration of railway wheels and to wheelset stability as key elements affecting high-speed vehicle dynamics, noise emission, and safety. In the present study, railway wheel tire is treated as a curved beam with various beam models, and the wheel plates are modeled as Winkler’s elastic foundation. New results are presented concerning the influence of the residual stresses on the corrugation and poligonalization of wheels as well as wave propagation in the wheel tire.

Highlights

The cost-efficiency, maintenance, comfort and safety of railway operation depend strongly on the quality of the wheelset–track interaction
The wheel rim movement has a great impact on the above-mentioned subjects; the study of wheel rim behavior is of very great importance
The contact problems of wheel–rail interaction in majority of investigations are limited to the dynamic effects caused by the vertical motion of the contact points under assumption that the contact stiffness is linearly dependent on the load

Summary

Introduction

The cost-efficiency, maintenance, comfort and safety of railway operation depend strongly on the quality of the wheelset–track interaction. Design of rotating elements of modern high-speed railway vehicles requires deep understanding of the behavior of wheels and wheelsets as rotors and wave propagation phenomena in wheel rims, responsible for noise being emitted, corrugation, wheel poligonalization, and wear of a wheel–rail system. The contact problems of wheel–rail interaction in majority of investigations are limited to the dynamic effects caused by the vertical motion of the contact points under assumption that the contact stiffness is linearly dependent on the load. Some of the results of previous studies are overviewed that are essential for the understanding of the basic phenomena of vehicle–truck interaction from the point of view of the rotor dynamics. The other parts of the paper are devoted to influence of residual stress on configuration of this regions, wheels dynamics, and wheelset stability

Effect of curvature of wheel rim modeled as a beam on elastic foundation

Phase velocity of wave propagated in the rim

Remark on wheel–rail contact with corrugation

Concluding remarks