Relation Between Track Irregularity of Speed-Increased Railway and Dynamic Speed Limits Through Simulation

Wang Zhi-Chen1, Song Ying*, 1, Wang Jian-Xi2
1 School of Transportation Institute, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China
2 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China

© 2014 Wang et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the 17 Northeast, Second Inner Ring, Shijiazhuang, Hebei, Postcard: 050043, P.R. China; Tel: 13933841970; E-mail:


Based on the vehicle-track coupled dynamics theory and the corresponding simulation software ADAMS/Rail software package, a vehicle-track coupling system model is established, and the track irregularity is introduced to the coupling system model as an excitation source. Firstly, the dynamic responses of speed-increased railway vehicle and track components due to different types of track irregularity are obtained. Secondly, the sensitive wavelength of different track irregularities in high-speed operation is discussed. Finally, suggestions about the maximum operation speed to meet the standards value of daily maintenance target, comfortable value, emergency repair and speed management target are put forward.

Keywords: Dynamic speed limits, speed-increased railway, track irregularity, vehicle-track coupled model.