<b>Wheel-rail Tangential Contact Force Model for Analyzing Vehicle Dynamics under Running in Rainy Conditions</b>

This paper describes a wheel-rail tangential contact force model for analyzing vehicle dynamics under running in rainy conditions. So far, vehicle dynamics analyses have only been conducted in dry conditions. In this study, we investigate and propose a wheel-rail tangential contact force model for analyzing vehicle dynamics under running in rainy conditions. The proposed model combines Kalker’s linear rolling contact theory with the relationship between adhesive coefficient and velocity measured in running experiments. The validity and generality of the proposed model was confirmed by a measurement experiment of tangential contact force using a twin-disc sliding-frictional rolling machine.