Investigation of railway wheelset profile wear by using computer simulation

Lukáš Smetanka,Pavol Šťastniak,Slavomír Hrček,I Malujda,M Berdychowski,Ł Warguła,M Dudziak,K Talaśka,J Górecki,D Wojtkowiak,P Krawiec,D Wilczyński

doi:10.1051/matecconf/201925402041

Abstract

The wear of rails and wheels is important problem in rail traffic. The change of the shape of the wheel profile has not only a great influence on the dynamic properties of the vehicle (like stability, safety by passing curved tracks, etc.), but also affects the ride comfort of passengers and environmental insults, in extreme cases it can cause rail derailment. One of the ways to predict these undesired conditions are computer aided simulation analyses. In this article are presented results of wheel profile wear by Archard wear law, when the vehicle of type Model A was driving in track by constant velocity of 30 m/s. The vehicle was traveling along track where the rail profile was defined by standard (UIC 60 profile) with cant of 1:40, or the track profile really measured on the track, the profile S 91700_16 with the cant of 1:20. Simulations were realized by SIMPACK software.

Highlights

Wear belongs to the degradation processes, where material is lost from one or both surfaces of contact shapes of rigid bodies
Where: - FF is frictional force, - μ is frictional coefficient, - FN is applied normal force. This frictional equation is based on two basic assumptions, first is approach that the stress distribution is independent to normal load and second that the applied load is proportional to real contact area
This article is aimed to the simulation model of railway wheel wear

Summary

Introduction

Wear belongs to the degradation processes, where material is lost from one or both surfaces of contact shapes of rigid bodies. On other side is wear caused by the application of the cyclic loading of the component, the nucleation of the crack and its spreading into the final state of the fracture of the material. This means that a worn fracture occurs after several thousand cycles, which correspond to the fatigue life of the loaded component [1, 2]. Over time the process of fatigue become separate scientific area named RCF (Rolling Contact Fatigue) [3,4,5,6]. The impact of wear certainly affects the acoustic and vibrational expression of the car on the rail, which, by increasing the negative side, devastates the environmental environment around the tracks [1, 7]

Archard wear law in SIMPACK software

Preparation of simulation

Track parameters

Simulations and evaluation of results

Conclusion