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Forced Vibrations of Frictionally Damped Stator Segments PUBLIC ACCESS

[+] Author Affiliations
T. Berruti, L. Goglio, S. Filippi, M. M. Gola

Politecnico di Torino, Torino, Italy

Paper No. 99-GT-412, pp. V004T03A050; 9 pages
doi:10.1115/99-GT-412
From:
  • ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General
  • Indianapolis, Indiana, USA, June 7–10, 1999
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7861-3
  • Copyright © 1999 by ASME

abstract

The paper deals with the use of friction among bladed segments to reduce vibrations in turbomachinery. The non-linearity of the phenomenon is included in the analysis after that the detailed finite element model of the segment has been condensed. In the solution search, both numerical integration and harmonic balance method are used. The latter is here extended to the case of slip among parts in relative motion. By means of a sample case it is shown that the simplified harmonic solution can lead to the same results given by time-consuming numerical integration. Some insight on the slipping phenomenon between segments is obtained.

Copyright © 1999 by ASME
Topics: Vibration , Stators
This article is only available in the PDF format.

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