磁気減衰を利用した転動振り子型動吸振器の開発

抄録

In the vertical floor isolation system, rocking vibration of seismic isolated equipment is excited by horizontal earthquake motion. This paper deals with a dynamic absorber applicable to rocking vibration reduction of the vertical seismic isolated equipment. The proposed system is a rolling pendulum type dynamic absorber using magnetic damper, which is composed of circular rails, a rolling body including magnets and a conductor plate. The design method for the dynamic absorber and the evaluation method for vibration reduction effect are showed in this paper. The dynamic characteristics are also examined by vibration test. It is confirmed from the vibration tests using a rocking model apparatus that the proposed dynamic absorber is effective for rocking vibration reduction.