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Vibration Characteristics of Systems with Multiple Blades

journal contribution
posted on 2023-06-08, 00:20 authored by G X Ren, Z C Zheng, William WangWilliam Wang
An interesting phenomenon can be observed when the state-space dynamic substructural method is applied to the eigenproblem of bladed disk-shaft systems: whether or not the shaft is flexible, each frequency of the single root-fixed blade appears as a frequency of the whole structure with a multiplicity of at least (n -3), where n is the number of repetitive blades. The presented result can be regarded as an extension of previous findings by the authors in the sense that the commonly interfaced repetitive substructures are allowed to be treated as a rigid body in modal analysis. The defectiveness issue of the multiple eigenvalues arising from the repetitive substructures is also addressed. Examples of rotary wing models and a simplified turbine model are presented for validation together with attempting their physical explanations.

History

Publication status

  • Published

Journal

Journal of Sound and Vibration

ISSN

0022460X

Publisher

Journal of Sound and Vibration

Issue

4

Volume

225

Page range

597-610

ISBN

0022-460X

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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