Train/track interaction model for wheel/rail defects analysis
Résumé
The train/track interaction models available in the literature introduce defects on wheel or rail but they usually
do not consider combination of them. The aim of this paper is to provide a dynamic model of wheel/rail
interaction able to take into account any kind of defects. For this purpose, a time-domain investigation
is done to predict the normal contact force and displacements of wheel and rail. The model includes a
multi-body representation of vehicle and track, coupled by a contact model based on the Distributing Points
Reacting Spring (DPRS) procedure which allows the local three-dimensional description of the surfaces in
contact and the use of actual geometries. After comparison with a finite-element model, it appears that
the present model gives accurate results while being little-time consuming. An example of combination of
defects is then presented and discussed.