A method for use of cyclic symmetry properties on analysis of nonlinear multiharmonic vibrations of bladed disks

Petrov, E P (2004) A method for use of cyclic symmetry properties on analysis of nonlinear multiharmonic vibrations of bladed disks. Journal of Turbomachinery, 126 (1). pp. 175-183. ISSN 0889-504X

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Abstract

An effective method for analysis of periodic forced response of nonlinear cyclically symmetric structures has been developed. The method allows multiharmonic forced response to be calculated for a whole bladed disk using a periodic sector model without any loss of accuracy in calculations and modeling. A rigorous proof of the validity, of the reduction of the whole nonlinear structure to a sector is provided. Types of bladed disk forcing for which the method may be applied are formulated. A multiharmonic formulation and a solution technique for equations of motion have been derived for two cases of description for a linear part of the bladed disk model: (i) using sector finite element matrices and (ii) using sector mode shapes and frequencies. Calculations validating the developed method and a numerical investigation of a realistic high-pressure turbine bladed disk with shrouds have demonstrated the high efficiency of the method

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: 26 Nov 2012 15:17
Last Modified: 26 Nov 2012 15:17
URI: http://sro.sussex.ac.uk/id/eprint/43007
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