Identification of Rotor Parameters

  • V. Schlegel
Part of the International Centre for Mechanical Sciences book series (CISM, volume 273)


Turbomachines do not only possess the ability to convert fluid energy into rotational energy but also the undesirable attribute that their rotors vibrate. Therefore the mechanical behaviour of the rotor has to be analysed. Whereas the inertia distribution of the shaft can be determined from its geometry, the stiffness distribution cannot be obtained easily because of jumps in the diameter of the shaft. In modeling the system consisting of a rotor on its bearings, the task which presents most difficulty is the description of the dynamical properties of the oil film used in the journal bearings. In most cases a linear model, the simplest one, is chosen. The coefficients can either he obtained experimentally from very simplified test rigs with rigid rotors or by the solution of the linearised hydrodynamic theory for oil film bearings. A second uncertainty in calculating the vibrational behaviour of the rotor of a turbomachine is due to the difficulty of specifying the true distribution of the unbalance and the initial bow of a rotor.


Shape Function Rotor Parameter Column Operator Hydrodynamic Theory Vibrational Behaviour 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Vetter, W.J.: Matrix Calculus and Taylor Expansion, SIAM Rev. 15 (1973) 2, 351–369.CrossRefMathSciNetGoogle Scholar

Copyright information

© Springer-Verlag Wien 1984

Authors and Affiliations

  • V. Schlegel

There are no affiliations available

Personalised recommendations