A method has been developed for high-accuracy analysis of forced response levels for mistuned bladed disks vibrating in gas flow. Aerodynamic damping, the interaction of vibrating blades through gas flow, and the effects of structural and aerodynamic mistuning are included in the bladed disk model. The method is applicable to cases of high mechanical coupling of blade vibration through a flexible disk and, possibly shrouds, to cases with stiff disks and low mechanical coupling. The interaction of different families of bladed disk modes is included in the analysis providing the capability of analyzing bladed disks with pronounced frequency veering effects. The method allows the use of industrial-size sector models of bladed disks for analysis of forced response of a mistuned structure. The frequency response function matrix of a structurally mistuned bladed disk is derived with aerodynamic forces included. A new phenomenon of reducing bladed disk forced response by mistuning to levels that are several times lower than those of their tuned counterparts is revealed and explained.
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June 2010
Research Papers
A Method for Forced Response Analysis of Mistuned Bladed Disks With Aerodynamic Effects Included
E. P. Petrov
E. P. Petrov
Department of Mechanical Engineering, Centre of Vibration Engineering,
e-mail: y.petrov@imperial.ac.uk
Imperial College London
, South Kensington Campus, London SW7 2AZ, UK
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E. P. Petrov
Department of Mechanical Engineering, Centre of Vibration Engineering,
Imperial College London
, South Kensington Campus, London SW7 2AZ, UKe-mail: y.petrov@imperial.ac.uk
J. Eng. Gas Turbines Power. Jun 2010, 132(6): 062502 (10 pages)
Published Online: March 17, 2010
Article history
Received:
April 8, 2009
Revised:
April 15, 2009
Online:
March 17, 2010
Published:
March 17, 2010
Citation
Petrov, E. P. (March 17, 2010). "A Method for Forced Response Analysis of Mistuned Bladed Disks With Aerodynamic Effects Included." ASME. J. Eng. Gas Turbines Power. June 2010; 132(6): 062502. https://doi.org/10.1115/1.4000117
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