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Magnetorheological Isolators Using Multiple Fluid Modes

Smart Structures Laboratory, Department of Aerospace Engineering University of Maryland, College Park, MD 20742, USA

Young-Tai Choi

Smart Structures Laboratory, Department of Aerospace Engineering University of Maryland, College Park, MD 20742, USA

Norman M. Wereley

Smart Structures Laboratory, Department of Aerospace Engineering University of Maryland, College Park, MD 20742, USA, wereley{at}umd.edu

Seung-Bok Choi

Smart Structures and Systems Laboratory, Department of Mechanical Engineering Inha University, Incheon 402-751, South Korea

This study presents the experimental and theoretical evaluation of an MR (magnetorheological) isolator using multiple fluid modes including shear, flow and squeeze. For doing so, a novel type of multi-mode MR isolator against multi-degree-of-freedom excitations is proposed and fabricated. The experimental testing of the proposed MR isolator is conducted by an MTS machine and its damper characteristics are experimentally evaluated by equivalent damping and complex stiffness methods. To construct a theoretical model of the MR isolator, its dynamic equation is derived and important model parameters are identified by the force averaging method using the force—displacement or the force-velocity plots. Using the theoretical model, the damper characteristics of the MR isolator are also predicted and compared to those computed using the experimental data.

Key Words: magnetorheological fluids • magnetorheological isolator • equivalent damping • complex stiffness • shear mode • flow mode • squeeze mode.

References

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Journal of Intelligent Material Systems and Structures, Vol. 18, No. 12, 1143-1148 (2007)
DOI: 10.1177/1045389X07083129


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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Web of Science (2) Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Brigley, M. Articles by Choi, S.-B. Search for Related Content Social Bookmarking                         What's this?