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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Identification of Mistuning Characteristics of Bladed Disks From Free Response Data—Part I

[+] Author and Article Information
M. P. Mignolet, A. J. Rivas-Guerra

Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106

J. P. Delor

Vehicle Dynamics and Mechanisms, General Motors Corporation, 2000 Centerpoint Parkway, Pontiac, MI 48341-3147

J. Eng. Gas Turbines Power 123(2), 395-403 (Jun 09, 1999) (9 pages) doi:10.1115/1.1338949 History: Received May 04, 1999; Revised June 09, 1999
Copyright © 2001 by ASME
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Figures

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Two-degree-of-freedom per blade disk models
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Single-degree-of-freedom per blade disk model
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Errors (a) in the mean and (b) in the standard deviation of the maximum amplitude of resonant response of the blade. ML, RMS, and IRMS approaches, single-degree-of-freedom blade model excited at the tuned natural frequency corresponding to the rth engine order, ωrt.
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Probability density function of the amplitude of the highest responding blade. Original parameters, estimated by ML, RMS, and IRMS approaches, single-degree-of-freedom blade model excited at the tuned natural frequency corresponding to the ninth engine order, ω9t.
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Errors (a) in the mean and (b) in the standard deviation of the maximum response of the mass m2. ML, ML with first mode fixed (mf), RMS and IRMS strategies, two-degree-of-freedom blade model 1 excited at the lowest tuned natural frequency corresponding to the rth engine order, ωr,1t.
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Probability density function of the maximum amplitude of response of the mass m2. Original parameters, estimated by ML, RMS, an IRMS approaches two-degree-of-freedom blade model 1 excited at the lowest tuned natural frequency corresponding to the ninth engine order, ω9,1t.
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Probability density function of the maximum amplitude of response of the mass m2. Original parameters, estimated by ML and RMS approaches, two-degree-of-freedom blade model 1 excited in a ninth engine order excitation in a frequency sweep around the corresponding lowest tuned frequency, ω∊⌊0.95ω9,1t,1.05ω9,1t⌋.

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