Abstract
On sharp railway curves as those that are rare in mainlines, the wheel lateral force of rail vehicles increases due to the growth of attack angle and causes the heavy wear of both wheel flange and rail. This paper deals with the curving performance of an active steering vehicle that is converted from a self-steering one by replacing the damper in the longitudinal axle supporting mechanism to an actuator. MBS software SIMPACK is employed for the simulation. Simulation results show that the active steering system has a potential to reduce the lateral force even in sharp curves the radius of which is less than 200 m, while the original self-steering vehicle cannot achieve the reduction. It is also indicated that the running stability of the vehicle with proposed active steering mechanism does not lower from the self-steering condition and the control force generated by track irregularity does not become large up to the level that increases the running vibration and wheel lateral force on tangent track.
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