On the Dynamics of a Rigid Rotor with Static Unbalance Symmetrically Mounted in Compliant Air Bearings

  • Christoph BaumEmail author
  • Hartmut Hetzler
  • Wolfgang Seemann
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 21)


A reduced Reynolds equation for an ideal gas, with a Winkler-type housing compliance is coupled with a rigid rotor model and solved simultaneously. By means of a Galerkin approach the dimension of the instationary bearing problem is reduced, without simplifications by neglecting individual terms. An evident reduction of calculation time is achieved, and consequently a direct time integration of the coupled problem without resorting to look-up tables is possible. Using this coupled model, the effects of the compliancy on the stationary solutions and during rotor run-up and run-down simulations are investigated.


Nonlinear dynamics Stability Rigid rotor Static unbalance Gas bearing Foil air bearing Model order reduction 


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Christoph Baum
    • 1
    Email author
  • Hartmut Hetzler
    • 2
  • Wolfgang Seemann
    • 1
  1. 1.Institute of Engineering Mechanics (ITM)Karlsruhe Institute of Technology (KIT)KarlsruheGermany
  2. 2.Engineering Dynamics GroupUniversity of KasselKasselGermany

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