An integrated experimental-numerical study of forced response for a mistuned bladed disk has been performed. A full chain for the predictive forced response analysis has been developed including data exchange between the computational fluid dynamics code and a code for the prediction of the nonlinear forced response for a bladed disk. The experimental measurements are performed at a full-scale single stage test rig with excitation by aerodynamic forces from gas flow. The numerical modeling approaches and the test rig setup are discussed. Comparison of experimentally measured and predicted values of blade resonance frequencies and response levels for a mistuned bladed disk without dampers is performed. A good correspondence between frequencies at which individual blades have maximum response levels is achieved. The effects of structural damping and underplatform damper parameters on amplitudes and resonance frequencies of the bladed disk are explored. It is shown that the underplatform damper significantly reduces scatters in values of the individual blade frequencies and maximum forced response levels.
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e-mail: y.petrov@imperial.ac.uk
e-mail: l.di.mare@imperial.ac.uk
e-mail: holger.hennings@dlr.de
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Forced Response of Mistuned Bladed Disks in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results
Evgeny Petrov,
Evgeny Petrov
Department of Mechanical Engineering,
e-mail: y.petrov@imperial.ac.uk
Imperial College London
, Exhibition Road, SW7 2AZ, UK
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Luca Di Mare,
Luca Di Mare
Department of Mechanical Engineering,
e-mail: l.di.mare@imperial.ac.uk
Imperial College London
, Exhibition Road, SW7 2AZ, UK
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Holger Hennings,
Holger Hennings
German Aerospace Center,
e-mail: holger.hennings@dlr.de
Institute of Aeroelasticity
, Bunsenstrasse 10, Göttingen, Germany
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Robert Elliott
Robert Elliott
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Evgeny Petrov
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, SW7 2AZ, UKe-mail: y.petrov@imperial.ac.uk
Luca Di Mare
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, SW7 2AZ, UKe-mail: l.di.mare@imperial.ac.uk
Holger Hennings
German Aerospace Center,
Institute of Aeroelasticity
, Bunsenstrasse 10, Göttingen, Germanye-mail: holger.hennings@dlr.de
Robert Elliott
J. Eng. Gas Turbines Power. May 2010, 132(5): 052504 (10 pages)
Published Online: March 5, 2010
Article history
Received:
April 8, 2009
Revised:
April 15, 2009
Online:
March 5, 2010
Published:
March 5, 2010
Citation
Petrov, E., Di Mare, L., Hennings, H., and Elliott, R. (March 5, 2010). "Forced Response of Mistuned Bladed Disks in Gas Flow: A Comparative Study of Predictions and Full-Scale Experimental Results." ASME. J. Eng. Gas Turbines Power. May 2010; 132(5): 052504. https://doi.org/10.1115/1.3205031
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