Electro-Rheological (ER) fluid is a class of functional fluid whose yield stress can be changed by an electric field applied to the fluid, which is observed as a variation of apparent viscosity. This functional fluid is applied to a controllable squeeze film damper (SFD) for stabilizing a flexible rotor system. In applying ER fluid to a conventional passive SFD, a pair of rings in the damper can be used as electrodes. When the electrodes are divided into a horizontal pair and a vertical one, the SFD can provide external damping in each direction independently. A prototype of the directionally controllable SFD was constructed and its performance was experimentally and numerically investigated in the present work.
Directionally Controllable Squeeze Film Damper Using Electro-Rheological Fluid
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received Feb. 2001; Revised July 2001. Associate Editor: R. Ohayon.
Ahn, Y. K., Yang, B., and Morishita, S. (July 1, 2001). "Directionally Controllable Squeeze Film Damper Using Electro-Rheological Fluid ." ASME. J. Vib. Acoust. January 2002; 124(1): 105–109. https://doi.org/10.1115/1.1420702
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