ばね質点系と振動する台との衝突振動の抑制に関する実験的研究

抄録

A railway current collection system mainly consists of a pantograph and a conductor line. Pantograph in a railway current collection system sometimes separates from the conductor line. This phenomenon is called contact loss. At the contact loss, the contact force is lost. Contact loss is not desirable from the view points of operation and maintenance. It has been reported that the contact loss occurred in a rigid conductor line system. The contact loss in this system is well modeled as an impact oscillation between a mass-spring system and a vibrating plate. In the previous study, we investigated the effects of an additional mass on the impact oscillations between a single degree of mass-spring system and a sinusoidal vibrating plate. When the excitation frequency of the vibrating plate is near the natural frequency of the second mode, the system shows the strong suppression effects on the impact oscillation. Therefore, the additional mass and the semi-active control of the spring stiffness can prevent the occurrence of the impact oscillations. In this study, we propose the two degrees of freedom mass-spring system. In particular, we conducted the experiments to confirm the suppression of impact oscillations and verify the theoretical predictions.