Investigation of the effect of damaged wheels on train tracks with using dynamic simulation

The train wagon experiences vibrations when moving on the rails, the most important of which is the vibrations caused by damaged wheels. Vibrations of the wagon at high speeds cause a kind of instability in the movement of the train. In order to evaluate the vibration behavior of the wheel and train system of the train, this study introduces the dynamic analysis of the system according to the phenomenon of contact of the damaged wheel with the sound rail. Finite element modeling (FEM) was used to simulate the mechanical behavior of the test, which shows the dynamic reaction of components under wheel impact loading conditions on rails. In this study, a steel wheel where uses in the Iran railway system has been simulated using the finite element method under rolling contact conditions, assuming that it has a defect. For this purpose, three-dimensional modeling and finite element analysis in Abaqus software has been used. In the simulation, a real-size railway system was analyzed. AISI1045 for rail material and D1 steel for damaged wheel were used and their dynamic characteristics were compared.