Characteristics of ball screw type damper with magnetic damping

The effects of vibration isolation of a new type mechanical damper on a simply supported beam and its thermal characteristics are discussed theoretically and experimentally. The damper is composed of a ball screw, a flywheel and a magnetic damper, which uses several pairs of rare-earth permanent magnets and an aluminium or copper disk. The results may be summarized as follows: (1) For larger values of moment of inertia of the flywheel, the damper approaches a snubber. (2) When the flywheel is removed, the damper acts as a mechanical dashpot having viscous damping. (3) This damper is effective even under high temperature circumstances of about 100 deg C. (author)