非沈降形粘性ダンパの開発(液体工学,液体機械)

概要

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We proposed a new type of viscous fluid damper of non-sedimentation type having complex fluids : MF (magnetic fluid), MR (magneto-rheological fluid), MCF (magnetic compound fluid). The damper never has the sedimentation of particles by using permanent magnet settled in a cylinder. We also used an electro-magnet by applying steady or fluctuating magnetic fields and then the damper is suitable as semi-active damper. To investigate the effect of damping, we measured displacement ratio under low frequency of the vibration. By comparing among the differences of the damping effects by three kinds of the fluids, MCF has the largest damping effect. In case of using fluctuating magnetic field, it is also larger than in that of steady magnetic field. The cause is due to the cluster of particles aggregated like a chain or necklace in the MCF.
社団法人日本機械学会の論文
2003-09-25