Influence of Modeling of a Rotor System on Accuracy of Identification of Its Unbalance Changes

  • J. M. Krodkiewski
  • N. Zhang
  • J. Ding
Conference paper
Part of the International Centre for Mechanical Sciences book series (CISM, volume 352)


The paper presents a procedure for identification of unbalance changes of rotor-oil bearing system during its operation. The procedure bases on the monitored trajectories of journals with respect to their bearing cases and the non-linear mathematical model of the rotor system. To assess applicability of this procedure, the influence of measuring errors and accuracy of modeling of the rotor is investigated. Results lead to conclusion that this procedure could be applied to on line identification of plane at which change in unbalance distribution has taken place.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Goodman, T. P., “A Least-Squares Method for Computing Balance Corrections”, Journal of Engineering for Industry, Trans. of ASME, Vo1. 86, August 1964, pp. 273–279.CrossRefGoogle Scholar
  2. 2.
    Lund, J. W. and Tonnesen, J., “Analysis and Experiments on Multi-Plane Balancing of A Flexible Rotor”, Journal of Engineering for Industry, Trans. of ASME, Vol. 94, February 1972, pp. 233–242.CrossRefGoogle Scholar
  3. 3.
    Ramamurti, V. and Anantaraman, K. W., “Two-Plane In-Situ Balancing”, Journal of Sound and Vibration, 134 (2), 1989, pp. 243–352.CrossRefGoogle Scholar
  4. 4.
    Smalley, A. J., Baldwin, R. M. and Schrick, W. R., “Spray Automated Balancing of Rotors: Concept and Initial Feasibility Studies”, Journal of Engineering for Gas Turbines and Power, Trans of ASME, Vol. 111, October 1989, pp. 659–665.CrossRefGoogle Scholar
  5. 5.
    Craggs, A., “A Procedure for Balancing Large Turbo-Generator Set via A Finite Element Model”, Journal of Sound and Vibration, 108 (2), 1986, pp. 349–352.CrossRefGoogle Scholar
  6. 6.
    Krodkiewski, J. M. and Ding, “Theory and Experiments on a Method for On-Site Identifying Bearing Alignment Changes of Multi-Bearing Rotor System”, Journal of Sound and Vibration, Vol. 164, pp. 281–294, 1993CrossRefGoogle Scholar
  7. 7.
    Parszewski, Z.A., Roszkowski, M. and Gluza, J., “Pressure Distribution and Hydrodynamic Forces of Journal Bearing Partial Sleeves”, Arch. Mech. Engng., 4, 1967, p. 455.Google Scholar
  8. 8.
    Freund, J. E. and Walpole, R. E., “Mathematical Statistics”, Prentice-Hall Inc., 1980, pp. 256–257.Google Scholar

Copyright information

© Springer-Verlag Wien 1994

Authors and Affiliations

  • J. M. Krodkiewski
    • 1
  • N. Zhang
    • 1
  • J. Ding
    • 1
  1. 1.The University of MelbourneParkvilleAustralia

Personalised recommendations