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A Novel Limit Distribution for the Analysis of Randomly Mistuned Bladed Disks FREE

[+] Author Affiliations
Marc P. Mignolet

Arizona State University, Tempe, AZ

Chung-Chih Lin

Ford Motor Company, Dearborn, MI

Paper No. 96-GT-414, pp. V005T14A050; 9 pages
doi:10.1115/96-GT-414
From:
  • ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General
  • Birmingham, UK, June 10–13, 1996
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7876-7
  • Copyright © 1996 by ASME

abstract

A recently introduced perturbation technique is employed to derive a novel closed form model for the probability density function of the resonant and near-resonant, steady state amplitude of blade response in randomly mistuned disks. In its most general form, this model is shown to involve six parameters but, in the important practical case of a pure stiffness (or frequency) mistuning, only three parameters are usually sufficient to completely specify this distribution. A series of numerical examples are presented that demonstrate the extreme reliability of this three-parameter model in accurately predicting the entire probability density function of the amplitude of response, and in particular the large amplitude tail of this distribution which is the most critical effect of mistuning.

Copyright © 1996 by ASME
Topics: Disks
This article is only available in the PDF format.

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