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

journal contribution
posted on 2023-06-08, 13:54 authored by Yevgen PetrovYevgen Petrov
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

History

Publication status

  • Published

Journal

Journal of Turbomachinery

ISSN

0889-504X

Publisher

American Society of Mechanical Engineers

Issue

1

Volume

126

Page range

175-183

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-11-26

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