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Torsional Systems: Vibration Response by Means of Modal Analysis

  • P. Schwibinger
  • R. Nordmann
Part of the International Centre for Mechanical Sciences book series (CISM, volume 297)

Abstract

Large steam-turbine generators in operation may be stimulated to torsional vibrations by dynamic moments at the generator due to electrical system transients. To solve the torsional vibration problem the turbogenerator shaft is modelled by the finite element method. The equations of motion are solved for the transient vibrations with the modal analysis technique — ‘Time-History-Method’. If the designer is interested in an approximation for the maximum response the ’Response-Spectrum-Method’ proves to work very effectively. This paper discusses ‘Time-History-’ and ’Response-SpectrumMethod’ and presents the results for a 600 MW and a 722 MW turbo set.

Keywords

Response Spectrum Excitation Function Torsional Vibration Modal Force Participation Factor 
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.

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References

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Copyright information

© Springer-Verlag Wien 1988

Authors and Affiliations

  • P. Schwibinger
    • 1
  • R. Nordmann
    • 1
  1. 1.University of KaiserslauternKaiserslauternGermany

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