TY - JOUR
T1 - On use of characteristic wavelengths of track irregularities to predict track portions with deteriorated wheel/rail forces
AU - Xu, Lei
AU - Zhai, Wanming
AU - Chen, Zhaowei
PY - 2018/5/1
Y1 - 2018/5/1
N2 - 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.
AB - 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.
KW - Prediction method
KW - Time-frequency analysis method
KW - Track irregularity
KW - Vehicle-track coupled dynamics
KW - Wheel/rail interaction
UR - http://www.scopus.com/inward/record.url?scp=85037813436&partnerID=8YFLogxK
U2 - 10.1016/j.ymssp.2017.10.038
DO - 10.1016/j.ymssp.2017.10.038
M3 - Article
AN - SCOPUS:85037813436
SN - 0888-3270
VL - 104
SP - 264
EP - 278
JO - Mechanical Systems and Signal Processing
JF - Mechanical Systems and Signal Processing
ER -