A method for forced response analysis of mistuned bladed disks with aerodynamic effects included

Petrov, E P (2010) A method for forced response analysis of mistuned bladed disks with aerodynamic effects included. Journal of Engineering for Gas Turbines and Power, 132 (6). 062502. ISSN 0742-4795

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Abstract

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

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery
Depositing User: Yevgen Petrov
Date Deposited: 28 Nov 2012 17:16
Last Modified: 28 Nov 2012 17:16
URI: http://sro.sussex.ac.uk/id/eprint/43013
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