Working of Magnetic Dynamic Absorber : Sub-harmonic Vibration

概要

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In a vibrating system (principal mass) attached on a damped magnetic dynamic absorber containing two fixed side magnets and an absorber magnet (floating mass) which is subjected to an external periodic force, the amplitude of the principal mass will be decreased, but by the character of the magnets in the magnetic dynamic absorber, a non-linear motion occurs in the vibrating system and also sub-harmonic vibrations are induced in it. In this paper, the sub-harmonic vibrations, especially the 1/2 sub-harmonic and the 1/3 sub-harmonic vibrations which occur in a vibrating system, are analyzed, the characteristic curves of the amplitudes are obtained, and the stabilities of those vibrations of the system are discussed. Moreover, the experimental results are shown. They almost agree with the theoretical results.
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