자기유변유체를 이용한 스퀴즈 필름 댐퍼에서의 부강성 효과 규명Identification of Negative Stiffness Effects in Magneto-Rheological Fluid based Squeeze Film Damper

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In order to investigate the stability of magneto-rheological fluid based squeeze film damper (MR-SFD), its negative stiffness effect, which arises from magnetization of MR-SFD, is identified theoretically and experimentally. The analytical model of MR-SFD includes the magnetic circuit as well as the displacement stiffness associated with the squeeze mode of MRF. Extensive experiments are carried out to measure the magnetic attraction forces generated in the MR-SFD, with the excitation frequency and the eccentricity of the journal varied, which are controlled by an active magnetic bearing. The simulation and experimental results are found to be in good agreement. It is concluded that the negative stiffness effect dominates only in the low frequency region because its effect diminishes in the high frequency region due to the eddy-current loss.
Publisher
한국소음진동공학회
Issue Date
2001-11
Language
KOR
Citation

한국소음진동공학회 2001년도 추계학술대회, pp.739 - 744

URI
http://hdl.handle.net/10203/137442
Appears in Collection
ME-Conference Papers(학술회의논문)
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