DUAL-STAGE TUNED MASS DAMPER DEVICE USING MR FLUID TYPE BRAKE AND METHOD FOR STRUCTURE VIBRATION CONTROL

摘要

A dual-stage tuned mass damper device using an MR fluid type brake and a method for controlling vibration of a structure using the same are provided to efficiently reduce the response of a main structure by actively changing the rigidity of the damper device through a rigidity adjusting apparatus to tune the damper device to a higher frequency band. A dual-stage tuned mass damper device(10) using an MR fluid type brake includes a mass body(11), a variable rigidity spring member(12), and an attenuator(13). The mass body has a predetermined mass. The variable rigidity spring member is installed between the mass body and a main structure(1). The attenuator has a predetermined attenuation coefficient. The variable rigidity spring member has a first spring(12a), a second spring(12b), and a rigidity adjusting apparatus(20). The first spring is installed between the main structure and the rigidity adjusting apparatus, and the second spring is installed between the rigidity adjusting apparatus and the mass body. The rigidity adjusting apparatus is formed of the MR fluid type brake whose movement is fixed by the solidified fluid in case that a magnetic field is formed.