Tribology and Lubricants

  • 제13권2호
  • /
  • Pages.60-67
  • /
  • 1997
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  • 2713-8011(pISSN)
  • /
  • 2713-802X(eISSN)
한국트라이볼로지학회 (Korean Tribology Society)
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무한 소폭 전기유변 스퀴즈 필름 댐퍼에 관한 이론적 근사해

Theoretical Approximate Solutions for Electrorheological Short Squeeze Film Dampers

  • 정시영 (인하공업전문대학, 항공기계과) ;
  • 최상규 (한국기계연구원, 회전체진동실) ;
  • 강덕형 ((주)대한항공, 한국항공기술연구원)
  • 발행 : 1997.06.01
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초록

ER(electro-rheological) fluids, which are represented as Bingham fluids, have large and reversible changes in yield shear stresses by application of an electric field. In this paper, ER fluids are employed in a short squeeze film damper. The modified Reynolds equation for an ER short squeeze film damper is theoretically solved to get the approximate solutions of pressure profiles and damping coefficients. The theoretical approximate solutions are compared with numerical ones and both results are coincided very well. Both the direct and cross coupled damping coefficients substantially increase with increasing the yield shear stress of ER fluids. Furthermore, the synchronous response analysis of a rigid rotor supported on ER short squeeze film dampers is performed to show the improved damping capability of an ER short squeeze film damper.

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참고문헌

  1. IEEE Trans. on Electrical Insulation v.24 no.5 Electrortheology Jordan, T. C.;Shaw, M. T.
  2. J. of Non-Newtonian Fluid Mechanics v.8 The Electro-Rheological Effect and its Possible Uses Shulman, J. P.;Gordkin, R. G.;Korobko, E. V.;Gleb. V. K.
  3. Rotordynamics of Turbomachinery Vance, J. M.
  4. J. of Eng. for Gas Turbines and Supproted Rotors v.110-1 Effect of Fluid Inertia on the Performance of Squeeze Film Damper Supproted Rotors SanAndres, L. A.;Vance, J. M.
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