Investigation on Effect of Train Speed in Displacement of Railway Ballasted Track with Unsupported Sleepers

Document Type : Research Article

Authors

School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract

One of the main problems of the damages of rail tracks which is caused by track settlement is unsupported sleeper. Due to this defect the underlying area of sleeper is not supported on the ballast and causes the sleeper displacement to increase. The increase creates vibration in the track and vehicle components and causes problems on their performance. Hence, in this study the investigation of rail displacement in tracks with unsupported sleeper has been dealt with. Three dimensional modeling of the vehicle and ballasted track has been carried out using ANSYS and SIMPACK programs. To use this software, the modeling of a flexible track in the vehicle multibody model is possible. Ballasted track which is formed from components as rail, sleeper and ballast, has been considered to be flexible. In simulating the vehicle all of its main components have been considered and damping and stiffness values of bogie suspension systems have been considered to be nonlinear. The results obtained from numerical simulation have good agreement with field test results. The results show that the speed of the vehicle on the track displacement with less than four unsupported sleepers has no effect, but by increasing the number of unsupported sleepers, the effect of increasing velocity would be considerable.

Keywords

Main Subjects

References

[1] J.A. Zakeri, V. Ghorbani, Investigation on dynamic behavior of railway track in transition zone, Journal of Mechanical Science and Technology, 25(2) (2011) 287- 292.
[2] J. Zakeri, H. Xia, J. Fan, Effects of unsupported sleeper on dynamic responses of railway track, Journal of northern jiaotong university, 24(1) (2000) 50-55.
[3]  J. Blanco-Lorenzo, J. Santamaria, E. Vadillo, O. Oyarzabal, Dynamic comparison of different types of slab track and ballasted track using a flexible track model, J Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 225(6) (2011) 574-592.
[4] H. Thompson, T. Sussmann, T. Stark, S. Wilk, Non- invasive monitoring of track system gaps, in: Proceedings of Railway Engineering, Edinburgh, Acotland 2015.
[5] . Mosayebi, J.A. Zakeri, M. Esmaeili, Effects of train bogie patterns on the mechanical performance of ballasted railway tracks with  unsupported sleepers, J Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 232(1) (2018) 238-248.
[6] J.H. Lee, K. Magno, S.H. Joh, Utilization  of spectral velocity  of  flexural  waves   to   detect loose sleepers, Journal of Engineering Science and Technology, 13(6) (2018) 1411-1419.
[7] S. Kaewunruen, A. Remennikov, Investigation of free vibrations of voided concrete sleepers  in railway track system, J Proceedings of  the Institution of  Mechanical Engineers,  Part  F: Journal of Rail and Rapid Transit, 221(4) (2007) 495-507.
[8] Y. Bezin,  S.D.  Iwnicki,  M.  Cavalletti,  E.  De Vries, F. Shahzad, G. Evans, An investigation of sleeper voids using a  flexible  track  model integrated with railway multi-body dynamics, J Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 223(6) (2009) 597-607.
[9] J.F. Aceituno, P. Wang, L. Wang, A.A. Shabana, Influence of rail flexibility in a wheel/rail wear prediction model, J Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail Rapid Transit, 231(1) (2017) 57- 74.
[10] X. Lei, J. Wang, Dynamic analysis of the train and slab track coupling system with finite elements in a moving frame of reference, J Journal of Vibration and Control, 20(9) (2014) 1301-1317.
[11] Z. Ji, G. Yang, Y. Liu, Q. Jiang,  Analysis  of vertical vibration characteristics of the vehicle-flexible track coupling system under wind load and track irregularity, J Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 232(10) (2018) 2444-2455.
[12] R. Rodríguez, M. Buchschmid, G. Müller, Model order reduction in structural dynamics, in: European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2016, Crete Island, Greece, 2016.
[13] M. Rose, R. Keimer, E. Breitbach, L. Campanile, Parallel robots with adaptronic components, Journal of Intelligent Material Systems and Structures, 15(9-10) (2004) 763-769.
[14]  S. DIETZ, G. Schupp, Co-Simulation von MKS und FEM zur Simulation einer Brückenüberfahrt, J VDI- Berichte, (2000) 1-12.
[15] O. Wallrapp, Standardization of flexible body modeling in multibody system codes, Part I: Definition of standard input data, Journal of Structural and Mechanics, 22(3) (1994) 283-304.
[16] Technical specification of ER24PC locomotive, MAPNA Locomotive co., Iran, 2009.
AUT Journal of Mechanical Engineering
Volume 4, Issue 2
Spring 2020
Pages 193-200

Files

Share

How to cite

Statistics