Seismic response reduction of a three-story building by an MR grease damper

Tomoki Sakurai, Shin Morishita

    抄録

    This paper describes an application of magneto- rheological (MR) grease dampers as seismic dampers for a three-story steel structure. MR fluid is widely known as a smart material with rheological properties that can be varied by magnetic field strength. This material has been applied to various types of devices, such as dampers, clutches, and engine mounts. However, the ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain interval because of the density difference between the particles and their carrier fluid. To overcome this defect, we developed a new type of controllable working fluid using grease as the carrier of magnetic particles. MR grease was introduced into a cylindrical damper, and the seismic performance of the damper was subsequently studied via numerical analysis. The analysis results of the MR grease damper were compared with those of other seismic dampers. We confirmed that the MR grease damper is an effective seismic damper.

    本文言語英語
    ページ(範囲)1-10
    ページ数10
    ジャーナルFrontiers of Mechanical Engineering
    DOI
    ジャーナル掲載日受理済み/印刷中 - 2017 1 7

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    Lubricating greases
    Fluids
    Intelligent materials
    Clutches
    Seismic response
    Steel structures
    Numerical analysis
    Magnetic fields
    Engines
    Defects

    Keywords

      ASJC Scopus subject areas

      • Mechanical Engineering

      これを引用

      Seismic response reduction of a three-story building by an MR grease damper. / Sakurai, Tomoki; Morishita, Shin.

      :: Frontiers of Mechanical Engineering, 07.01.2017, p. 1-10.

      研究成果: ジャーナルへの寄稿記事

      Sakurai, Tomoki; Morishita, Shin / Seismic response reduction of a three-story building by an MR grease damper.

      :: Frontiers of Mechanical Engineering, 07.01.2017, p. 1-10.

      研究成果: ジャーナルへの寄稿記事

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      AB - This paper describes an application of magneto- rheological (MR) grease dampers as seismic dampers for a three-story steel structure. MR fluid is widely known as a smart material with rheological properties that can be varied by magnetic field strength. This material has been applied to various types of devices, such as dampers, clutches, and engine mounts. However, the ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain interval because of the density difference between the particles and their carrier fluid. To overcome this defect, we developed a new type of controllable working fluid using grease as the carrier of magnetic particles. MR grease was introduced into a cylindrical damper, and the seismic performance of the damper was subsequently studied via numerical analysis. The analysis results of the MR grease damper were compared with those of other seismic dampers. We confirmed that the MR grease damper is an effective seismic damper.

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