ABSTRACT
ABSTRACT: Accurate wheel-rail creep force models are necessary to correctly predict the vehicle-track interaction. Performed tests show that the state-of-the-art models used in MultiBody-System Simulations are either not able to reproduce the occurring effects or rely on phenomenological descriptions and need to be parametrized for every possible set of conditions. Therefore, a new Extended Creep Force (ECF) Model was developed which takes into account the presence of a Third Body Layer in-between the elastic wheel and rail. This layer consists of a normal stress and temperature dependent elasto-plastic material. It is also able to reproduce transient behaviour as observed during drive-train oscillations. The validation results show that the ECF model will lead to an improvement of the prediction quality regarding all aspects of the vehicle-track interaction.
