Reduction of forced response levels for bladed discs by mistuning: overview of the phenomenon

Petrov, E P (2011) Reduction of forced response levels for bladed discs by mistuning: overview of the phenomenon. Journal of Engineering for Gas Turbines and Power, 133 (7). 072501-. ISSN 0742-4795

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Abstract

The newly revealed phenomenon of reduction of forced response levels in a mistuned bladed disk to levels significantly (e.g., by a factor of 2 and more) lower than that of its tuned counterpart is studied in detail on an example of a realistic bladed disk. Statistical properties of the amplification factor of the mistuned forced response calculated with aero-effects included have been studied for cases of random blade mistuning and for mistuned blade rearrangements. The optimization search for the best mistuning patterns providing maximum forced response reduction effect have been performed and the robustness of the optimum mistuning patterns has been demonstrated. The combined effect of the aerodynamic and structural damping on the response reduction is assessed. It is shown that the new phenomenon is of major practical significance and has to be taken into account in analysis of the forced response and design decisions.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Yevgen Petrov
Date Deposited: 06 Feb 2012 19:19
Last Modified: 13 Mar 2017 10:52
URI: http://sro.sussex.ac.uk/id/eprint/20098

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