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Finding the Stiffnesses of Interface Contact Elements for the Computational Model of Steam Turbine Blading

[+] Author Affiliations
Josef Voldřich, Jan Lazar, Štefan Morávka

University of West Bohemia, Plzeň, Czech Republic

Pavel Polach

Research and Testing Institute Plzeň Ltd., Plzeň, Czech Republic

Paper No. DETC2017-67712, pp. V008T12A018; 12 pages
doi:10.1115/DETC2017-67712
From:
  • ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 29th Conference on Mechanical Vibration and Noise
  • Cleveland, Ohio, USA, August 6–9, 2017
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5822-6
  • Copyright © 2017 by ASME

abstract

A method is proposed for fitting the so-called contact stiffnesses (CSs) of interface elements for a nonlinear dynamic model (NDM) of a bladed disk with integral contact couplings. The method is based on comparison between frequencies of the resonant response of NDM and known natural frequencies in limiting linear cases. For this purpose, an effective approach for calculation of the resonant response NDM is presented allowing CSs to be picked individually. The method is demonstrated for the case of steam turbine bladed disk equipped with 48 inch blades.

Copyright © 2017 by ASME
Topics: Steam turbines

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