ON DYNAMICAL PROCESSES IN RAILWAY TRACTION UNITS CAUSED BY WHEELSET GRAVITY POINT ECCENTRICITIES

Authors analyse the effect of the wheelset gravity point eccentricity on the longitudinal dynamical processes of the vehicle by using a simple model describing the longitudinal motion of the wheelset and the bogie-frame interconnected through a linear spring/damper sys-tem. The torque driving the wheelset is given by a specified time function. The wheel/rail contact is treated by the approximate pure rolling condition. By using perturbation techniques, appoximate solutions of the equations of motion are determined