Forced response of mistuned bladed discs in gas flow: a comparative study of predictions and full-scale experimental results

Petrov, Evgeny, di Mare, Luca, Hennings, Holger and Elliott, Robert (2010) Forced response of mistuned bladed discs in gas flow: a comparative study of predictions and full-scale experimental results. Journal of Engineering for Gas Turbines and Power, 132 (5). 052504/1 - 052504/10. ISSN 0742-4795

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Abstract

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.

Item Type: Article
Additional Information: This paper has been selected by the Structures & Dynamics Committee as a Best Paper award winner from ASME Turbo Expo Congress and Exhibition, 2009.
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Yevgen Petrov
Date Deposited: 06 Feb 2012 21:29
Last Modified: 08 Mar 2017 05:38
URI: http://sro.sussex.ac.uk/id/eprint/31409

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