抄録
For the purpose of increasing the running speed and ensuring the running performance and safety of a high-speed vehicle, it is necessary to improve the prevention of hunting, improve the running performance in passage of curves and suppress erratic vibration due to track irregularities. In the present paper, the steering, Z-link suspension device mechanism, truck on the new conception for the high running stability on both straight and curved sections of the track is presented, and the hunting characteristic is examined in comparison with that of the SHINKANSEN vehicle. From the theoretical calculation, it becomes clear that the new truck has a slight toward expansion of the unstable region of body hunting in comparison with the SHINKANSEN truck. However, supplementing/both the adequate supporting stiffness of the axle and the elastic moment against the truck turning is an effective method of preventing body hunting. Furthermore, increasing the angular displacement of the rear axle to more than that of the front axle has the remarkable effect of raising the critical velocity of the truck hunting.
