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터보차져의 로터다이나믹 해석모델 개발 및 진동응답 해석

Development of Rotordynamic Analytical Model and Analysis of Vibration Response of a Turbocharger

  • 김병옥 (한국기계연구원 시스템다이나믹스연구실) ;
  • 이안성 (한국기계연구원 시스템다이나믹스연구실)
  • 투고 : 2010.07.27
  • 심사 : 2010.09.27
  • 발행 : 2010.10.01

초록

This paper deals with the development of analytical model of a turbocharger and its detail rotordynamic analysis. Two analytical models, which are verified by experimental modal testing, are proposed and the analytical model including rotor shaft extended to compressor and turbine wheel end side is chosen. A rotordynamic analysis includes the critical map, Campbell diagram, stability, and unbalance response, especially nonlinear transient response considering nonlinear fluid film force at bearings. Although the linearized analysis accurately predicts the critical speeds, stability limit, and stability threshold speed, the predicted vibration results are not valid for speeds above the stability threshold speed since the rotor vibrates with a subsynchronous component much larger than the one synchronous with rotor speed. Hence, for operating speed above the stability threshold, a nonlinear transient analysis considering nonlinear fluid film force must be performed in order to accurately predict vibration responses of rotor and guarantee results of analysis.

키워드

참고문헌

  1. 김기두 외, 2004, “중형 디젤엔진의 터보챠저 과급 시스템 최적화에 관한 연구,” 한국박용기관학회지, Vol. 28, No. 7, pp. 1138-1144.
  2. 양보석, 김용한, 석호일, 유광택, 2003, “과급기 축계의 진동해석,” 한국박용기관학회지, Vol. 27, No. 2, pp. 190-197.
  3. 이용복, 김태호, 김창호, 사종성, 이남수, 2003, “공기 포일 베어링으로 지지되는 무급유 터보 과급기 회전체 설계에 대한 연구,” 유체기계저널, Vol. 6, No. 1, pp. 51-56. https://doi.org/10.5293/KFMA.2003.6.1.051
  4. Rao, J. S., 1996, Rotor Dynamics, New Age International Publishers.
  5. Lund, J. W., 1974, “Stability and Damped Critical speeds of a Flexible Rotor in Fluid Film Bearings,” ASME Journal of Engineering for Industry, Vol. 96, No. 2, pp. 509-517. https://doi.org/10.1115/1.3438358
  6. Muszynska, A., 1986, “Whirl and Whip-Rotor Bearing Stability Problems," Journal of Sound and Vibration, Vol. 110, pp. 443-462. https://doi.org/10.1016/S0022-460X(86)80146-8
  7. Michael M. K. and Richard Booser, 2008, Applied Tribology-Bearing Design and Lubrication, 2nd Edition, Wiley.
  8. Bathe, K. J, 1982, Finite Element Procedures in Engineering Analysis, 2nd Edition, Prentice Hall.

피인용 문헌

  1. Rotordynamic Characteristics Analysis of Turbocharger Turbine for Spin Test vol.14, pp.6, 2011, https://doi.org/10.5293/kfma..2011.14.6.091