Abstract
In rotating machineries, resonance phenomena occur with large amplitude in the vicinity of the major critical speed. In this paper, a new vibration suppression method utilizing the discontinuous spring characteristics are proposed. This spring characteristics are made by additional springs with preload and additional dampers. This method has the following advantages: In designing these additional springs, we need not adjust their parameter values to the rotor stiffness and the system damper. The amplitude of vibration can be suppressed arbitrarily. This method is applicable not only to the stationary vibration but also to the nonstationary vibration. We clarified these phenomena theoretically and experimentally.
