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Optimum Strain Gauge Application to Bladed Assemblies

[+] Author Affiliations
J. Szwedowicz

ABB Turbo Systems, Ltd., Baden, Switzerland

S. M. Senn, R. S. Abhari

Swiss Federal Institute of Technology, Zurich, Switzerland

Paper No. GT2002-30306, pp. 725-733; 9 pages
doi:10.1115/GT2002-30306
From:
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3609-6 | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

Optimum placements of the strain gauges assure reliable vibration measurements of structural components such as rotating blades. Within the framework of cyclic vibration theory, a novel approach has been developed for computation of the optimum gauge positions on tuned bladed discs regarding the determined sensitivity, orthogonality, gradient and distance criteria. The utilized genetic algorithm optimization tool allows for an effective numerical search of suitable solutions of the defined optimization function. A rotating impeller disc represented by a cyclic finite element model demonstrates the application of this method. The present technique can be easily applied to other structural components requiring optimal strain gauge instrumentation.

Copyright © 2002 by ASME
Topics: Strain gages

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