Abstract
This paper deals with a new type of mechanical damper composed of a ball screw, a flywheel, and a vertically oscillating governor while attached to a single-degree-of-freedom system. By means of theory, experiment and digital simulation, this oscillator-type damper is analyzed in terms of the forced nonlinear vibration, its stability, and the effects of vibration isolation. The proposed damper basically differs from a flyball-type damper by using a vertically oscillating governor instead of a flyball governor. In general, the proposed damper is more simplified in its structure and more effective in suppressing the resonance of the primary system as compared with the flyball-type governor. The results of the paper are summarized as follows : (1) Resonance amplitude of the primary system is decreased due to the working of the governor. (2) The proposed damper is more effective than the flyball-type damper for suppression of the resonance amplitude of the primary system. (3) Stable solutions for the primary system and the governor are obtained when the forcing frequency is lower than the natural frequency of the governor. (4) Theoretical results are in agreement with the simulated values. (5) Effects of vibration isolation of the damper are confirmed experimentally.
