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The Impact of Geometric Scatter on High-Cycle-Fatigue of Compressor Blades

[+] Author Affiliations
Kay Heinze, Konrad Vogeler

Technische Universität Dresden, Dresden, Germany

Winfried-Hagen Friedl

Rolls-Royce Deutschland Ltd. & Co. KG, Blankenfeld-Mahlow, Germany

Paper No. GT2010-22083, pp. 591-599; 9 pages
doi:10.1115/GT2010-22083
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 6: Structures and Dynamics, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4401-4 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by Rolls-Royce Deutschland Ltd. & Co AG

abstract

The geometric parameters of manufactured compressor blades do not exactly comply with the design intention. These deviations result from the abrasion of the forging and milling machines as well as variations of the material properties or the blank part geometries. Using probabilistic methods, the geometric deviations can be considered within the design process. This paper presents the results of a probabilistic High-Cycle-Fatigue investigation under consideration of the geometric parameter scatter of the entire compressor blade. Based on a previous paper of the authors, the geometric parametrization as well as the process chain to apply the geometric scatter to an existing FE-mesh was supplemented by the radii and the geometric dimensions of the compressor blade root. Thus, the impact of all geometric parameter scatter on the High-Cycle-Fatigue strength, the eigenfrequencies and the mode shapes can be evaluated.

Copyright © 2010 by Rolls-Royce Deutschland Ltd. & Co AG

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