Nonlinear modal analysis and energy localization in a bladed disk assembly

Georgiades, Fotios and Peeters, Maxime and Kerschen, Gaetan and Golinval, Jean-Claude and Ruzzene, Massimo (2008) Nonlinear modal analysis and energy localization in a bladed disk assembly. ASME Proceedings | Structures and Dynamics, 5 . pp. 593-600. ISSN UNSPECIFIED

Full content URL: http://dx.doi.org/10.1115/GT2008-51388

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Abstract

The objective of this study is to carry out modal analysis of
nonlinear periodic structures using nonlinear normal modes
(NNMs). The NNMs are computed numerically with a method
developed in [18] that is using a combination of two
techniques: a shooting procedure and a method for the
continuation of periodic motion. The proposed methodology is
applied to a simplified model of a perfectly cyclic bladed disk
assembly with 30 sectors. The analysis shows that the
considered model structure features NNMs characterized by
strong energy localization in a few sectors. This feature has no
linear counterpart, and its occurrence is associated with the
frequency-energy dependence of nonlinear oscillations.

Additional Information:Proceedings of ASME TurboExpo 2008, Berlin Germany, GT2008-51388 ASME Turbo Expo 2008: Power for Land, Sea, and Air Volume 5: Structures and Dynamics, Parts A and B Berlin, Germany, June 9–13, 2008
Keywords:Nonlinear Modal Analysis, Georgiadis
Subjects:H Engineering > H310 Dynamics
H Engineering > H342 Vibration
H Engineering > H300 Mechanical Engineering
H Engineering > H140 Mechanics
Divisions:College of Science > School of Engineering
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ID Code:9495
Deposited On:30 May 2013 10:06

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