• Lei Xu
  • Wanming Zhai
  • Zhaowei Chen

The dynamic performance of the railway vehicles and the guiding tracks is mainly governed by the wheel-rail interactions, particularly in cases of track irregularities. In this work, a united model was developed to investigate the track portions subject to violent wheel/rail forces triggered by track irregularities at middle-low frequencies. In the modeling procedures, a time-frequency unification method combining wavelet transform and Wigner-Ville distribution for characterizing time-frequency characteristics of track irregularities and a three-dimensional nonlinear model for describing vehicle-track interaction signatures were developed and coupled, based on which the method for predicting track portions subject to deteriorated wheel/rail forces was proposed. The theoretical models developed in this paper were comprehensively validated by numerical investigations. The significance of this present study mainly lies on offering a new path to establish correlation and realize mutual prediction between track irregularity and railway system dynamics.

Original languageEnglish
Pages (from-to)264-278
Number of pages15
JournalMechanical Systems and Signal Processing
Publication statusPublished - 1 May 2018

    Research areas

  • Prediction method, Time-frequency analysis method, Track irregularity, Vehicle-track coupled dynamics, Wheel/rail interaction

ID: 37384522