Effects of Driving Torque, Braking Torque on Railway Vehicle Dynamics

Eisaku SATOH, Kazuhiko TEZUKA, Masayuki MIYAMOTO, Tomoaki AKAMINE, Noburo EHARA
In this paper, dynamics of a railway vehicle when driving or braking torques act on it, is analyzed with numerical simulations using a one-vehicle model. Effect of driving torque has been investigated. (1) When the driving or the braking torques do not act, there is no difference between the driving model and the conventional model. (2) As the driving torque is increased, the critical speed of hunting rises. (3) If the longitudinal creep force caused by the driving torque is in linear range, the effects caused by the driving torque are small, but if it is in nonlinear range, the effects become large. (4) When the longitudinal creep force is in saturation, the lateral displacement of wheelset becomes small, and fluctuations of longitudinal creep force and side thrust also become small. (5) When friction between rail and wheel is small, the driving torque exerts some effect on dynamics of a railway vehicle.