Prediction of rail profile evolution on metro curved tracks: wear model and validation

Analysis of the causes of severe side wear of the high rail on metro curves by numerical simulation and field investigation

“…The nonlinear characteristics of dampers and lateral bump stops were considered. The primary parameters of the dynamics model can be found in Ref 28 The vehicle-track dynamics model was verified with the measurement results of wheel and rail contact forces and the derailment coefficient. 28 Wheel-rail contact model.…”

“…The primary parameters of the dynamics model can be found in Ref 28 The vehicle-track dynamics model was verified with the measurement results of wheel and rail contact forces and the derailment coefficient. 28 Wheel-rail contact model. The distribution of contact pressure and tangential stress, as well as the distribution of local creep cannot be exported in SIMPACK, which are essential parameters for the rail wear calculation when using the local wear model.…”

“…Each part of the rail wear simulation model is briefly introduced in the following section and a detailed description of the rail wear prediction model can be found in Ref. 28 Vehicle-track dynamics model. The results of field investigation indicate that the wheels of the trailer and the motor vehicles have similar wear characteristics, so only the vehicle-track dynamics model of the trailer vehicle is built in this study.…”

“…The detailed process of rail profile updating and smoothing is given in Ref. 28 Verification of the rail wear model. The rail wear model was verified using rail wear monitoring data.…”

“…More detailed results about the model verification can be found in Ref. 28 Evaluation of different parameters on the high rail side wear Many parameters affect the high rail side wear. However, some of them cannot be changed after the metro line is put into operation, such as track layout, vehicle suspension parameters, and wheel and rail materials.…”