Analysis of Vibrations Generated by the Presence of Corrugation in a Modeled Tram Track

Julia I Real Herráiz,Vicente Soler Basauri,Silvia Morales-Ivorra,Clara Zamorano Martín

doi:10.1155/2015/290164

Julia I Real Herráiz, Vicente Soler Basauri + Show 2 more

Open Access

https://doi.org/10.1155/2015/290164

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Abstract

In recent years, there has been a significant increase in the development of the railway system. Despite the huge benefits of railways, one of the main drawbacks of this mode of transport is vibrations caused by vehicles in service, especially in the case of trams circulating in urban areas. Moreover, this undesirable phenomenon may be exacerbated by the presence of irregularities in the rail-wheel contact. Thus, an analytical model able to reproduce the vibrational behavior of a real stretch of tram track was implemented. Besides, a simulation of different types of corrugation was carried out by calculating in an auxiliary model the dynamic overloads generated by corrugation. These dynamic overloads fed the main model to obtain the vibrations generated and then transmitted to the track.

Highlights

The development of new railway networks as well as the improvement of the already existing tracks has become a worldwide priority
Once proved the ability of the model to reproduce the vibratory phenomenon from the real track, corrugation will be introduced in the model and its effect on the vibrations transmitted to the ground will be analyzed. This will require the use of an auxiliary model, as that presented by [12] is able to calculate those dynamic overloads generated by corrugation and transmitted to the track
In order to optimize this process the displacements are written in terms of the wave number domain and the expression of the inverse Fourier transform is converted into an addition following [14]

Summary

Introduction

The development of new railway networks as well as the improvement of the already existing tracks has become a worldwide priority. Once proved the ability of the model to reproduce the vibratory phenomenon from the real track, corrugation will be introduced in the model and its effect on the vibrations transmitted to the ground will be analyzed This will require the use of an auxiliary model, as that presented by [12] is able to calculate those dynamic overloads generated by corrugation and transmitted to the track. A sensibility analysis of the different parameters involved in the generation of dynamic overloads will be carried out to unravel those who are relevant in the vibration phenomenon and act on them This model may be useful to predict vibrations generated by the track corrugation and after establishing acceptable vibratory levels, it may allow determining the optimum. The present analytical model can be employed to calculate those track overloads due to corrugation which generate an aggravation of the rail irregularities and premature deterioration of the rest of the track, as stated by [3]

Analytical Modelization of the Track

Analysis of Corrugation

Conclusions