Adaptive simulation and integration method for wheel-rail contact problems in locomotive traction studies

Knowledge of creep forces at wheel-rail interface when high power is applied to the locomotive wheels has been subject many recent studies. The common interaction methods are generally divided by two theories – Hertzian and non-Hertzian. first method uses contact for normal problem tangential into algorithms Polach’s theory Simplified theory-based algorithm referred as Modified Fastsim. Kalker’s original Fastsim-based shows a better accuracy these Hertzian-based algorithms. second based on non-Hertzian theory, it Exact also developed Kalker implemented in Extended Contact library calculate interface. Considering that more accurate, this paper aims present an adaptive simulation integration (ASIM) which positioned middle between designed introduce transition from with application Fastsim calculation proposed aimed be used vehicle system dynamics studies performed multibody software packages. A specially coupling incorporating geometrical, normal, modules integrated Gensys benchmarked standard means traction tests use full mechatronic model adhesion locomotive. computational performance assessed discussed.