In recent years, there has been increasing research in several industrial fields for development of semi-active vibration control devices. In particular, devices using magneto-rheological (MR) fluid have been attracting great research interest because they can realize high performance as capacity-variable dampers. MR fluids are controllable fluids that respond to applied magnetic fields. Applied magnetic fields drastically change the viscosity of MR fluids from an oily state to a semi-solid state. This paper describes a study on a large capacity device using an MR fluid, i.e., an MR damper. This developed MR damper provides a maximum damping force of 300 kN. Various tests were carried out and the dynamic characteristics, force-displacement hysteresis loops and controllable forces were investigated. These tests verified that the MR damper provides a technology that enables effective semi-active control of large-scale structure systems, i.e., real buildings and civil engineering structures.
Development of Large Capacity Semi-Active Seismic Damper Using Magneto-Rheological Fluid
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division November 7, 2002; revision received May 30, 2003. Associate Editor: G. C. Slagis.
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Sodeyama, H., Suzuki, K., and Sunakoda, K. (February 26, 2004). "Development of Large Capacity Semi-Active Seismic Damper Using Magneto-Rheological Fluid ." ASME. J. Pressure Vessel Technol. February 2004; 126(1): 105–109. https://doi.org/10.1115/1.1634587
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