International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
권호 표지
DOI QR코드

DOI QR Code

Vibration Analysis of a Rotor considering Nonlinear Reaction of Hydrodynamic Bearing

  • Lee, Soo-Mok (Hyundai Maritime Research Institute, Hyundai Heavy Ind. Co, Ltd.) ;
  • Lim, Do-Hyeong (Hyundai Maritime Research Institute, Hyundai Heavy Ind. Co, Ltd.) ;
  • Bae, Jong-Gug (Hyundai Maritime Research Institute, Hyundai Heavy Ind. Co, Ltd.) ;
  • Yang, Bo-Suk (School of Mechanical Engineering, Pukyong National University)
  • Received : 2008.07.18
  • Accepted : 2008.12.06
  • Published : 2009.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper it was attempted to treat the hydrodynamic journal bearing as a time-based nonlinear reaction source in each step of rotor rotation in order to observe the bearing effect more realistically and accurately in stead of the conventional method of simple linearized stiffness and damping. Lubrication analysis based on finite element method is employed to calculate the hydrodynamic reaction of bearing and Newmark's method was used to calculate the rotor dynamics in the time domain. Simulation for an industrial electrical motor showed remarkable results with differences compared to those by the conventional method in the dynamic behavior of the rotor.

Keywords

References

  1. Vance, J. M., 1988, “Rotordynamics of Turbomachinery,” John Wiley & Sons Inc., New York.
  2. Yang, B. S., Choi, S. P. and Kim, Y. C., 2007, “Vibration reduction optimum design of steam turbine rotor-bearing system using hybrid genetic algorithm,” Structural and Multidisciplinary Optimization, Vol. 30, No. 1, pp. 43-53. https://doi.org/10.1007/s00158-004-0513-x
  3. Lin, Y., Cheng, L. and Huang, T. P., 1998, “Optimal design of complex flexible rotor-support systems using minimum strain energy under multi-constraint conditions,” Journal of Sound and Vibration, Vol. 215, No. 5, pp. 1121-1134. https://doi.org/10.1006/jsvi.1998.1690
  4. Rao, J. S., 1996, “Rotor Dynamics,” New Age International, New Delhi.
  5. Hamrock, B. J., 1994, “Fundamentals of Fluid Film Lubrication,” McGraw-Hill.
  6. Goenka, P. K., 1984, “Dynamically loaded journal bearings: finite element method analysis,” Trans. ASME, Journal of Tribology, Vol.106, pp. 429-439. https://doi.org/10.1115/1.3260954
  7. Klit, P. and Lund, J. W., 1986, “Calculation of the dynamic coefficients of a journal bearing, using a variational approach,” Trans. ASME, Journal of Tribology, Vol. 108, pp. 421-425. https://doi.org/10.1115/1.3261223