Development and application to seismic isolation and vibration control of innovative smart damper exploiting MR composites

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360087
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Tohoku University
• Principal Investigator: NAKANO Masami 東北大学, 流体科学研究所, 教授 (40147947)
• Co-Investigator(Kenkyū-buntansha): TOTSUKA Atsushi 東北大学, 流体科学研究所, 技術専門職員 (40626313)
• Co-Investigator(Renkei-kenkyūsha): FUKUKITA Akira 清水建設㈱, 技術研究所, グループ長 (20426589)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 機能性流体・材料 / マグネトレオロジー / ダンパ / 免震アイソレータ / 振動制御 / 知能制御システム

Outline of Final Research Achievements

In order to solve the sedimentation problem of dispersed particles in the MR fluid in the off-working state, two types of novel MR composites; "MR fluid porous composite" made of nonwoven impregnated with MR fluid and "MR rubber composite (MR elastomer)" consisting of micro-sized iron particles dispersed in a silicone rubber, have been newly fabricated. Exploiting the features and functionalities of two types of the MR composites, a damping-variable seismic MR fluid composite smart damper and a stiffness-variable multilayered MR elastomer isolator with magnetic field have been designed and developed, and applied to semi-active control systems for the seismic isolation and vibration of structures.

Free Research Field

工学、機械工学、流体工学、機械力学・制御、知能機械学