TY - GEN
T1 - A transfer matrix approach to vibration localization in mistuned blade assemblies
AU - Óttarsson, Gísli
AU - Pierre, Christophe
N1 - Publisher Copyright:
© 1993 by ASME.
PY - 1993
Y1 - 1993
N2 - A study of mode localization in mistuned bladed disks is performed using transfer matrices. The transfer matrix approach yields the free response of a general, mono-coupled, perfectly cyclic assembly in closed form. A mistuned structure is represented by random transfer matrices, and the expansion of these matrices in terms of the small mistuning parameter leads to the definition of a measure of sensitivity to mistuning. An approximation of the localization factor, the spatially averaged rate of exponential attenuation per blade-disk sector, is obtained through perturbation techniques in the limits of high and low sensitivity. The methodology is applied to a common model of a bladed disk and the results verified by Monte Carlo simulations. The easily calculated sensitivity measure may prove to be a valuable design tool due to its system-independent quantification of mistuning effects such as mode localization.
AB - A study of mode localization in mistuned bladed disks is performed using transfer matrices. The transfer matrix approach yields the free response of a general, mono-coupled, perfectly cyclic assembly in closed form. A mistuned structure is represented by random transfer matrices, and the expansion of these matrices in terms of the small mistuning parameter leads to the definition of a measure of sensitivity to mistuning. An approximation of the localization factor, the spatially averaged rate of exponential attenuation per blade-disk sector, is obtained through perturbation techniques in the limits of high and low sensitivity. The methodology is applied to a common model of a bladed disk and the results verified by Monte Carlo simulations. The easily calculated sensitivity measure may prove to be a valuable design tool due to its system-independent quantification of mistuning effects such as mode localization.
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U2 - 10.1115/93-GT-115
DO - 10.1115/93-GT-115
M3 - Conference contribution
AN - SCOPUS:84926049967
T3 - ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition, GT 1993
BT - Combustion and Fuels; Oil and Gas Applications; Cycle Innovations; Heat Transfer; Electric Power; Industrial and Cogeneration; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; IGTI Scholar Award
T2 - ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition, GT 1993
Y2 - 24 May 1993 through 27 May 1993
ER -