Georgiades, Fotios, Peeters, Maxime, Kerschen, Gaetan , Golinval, Jean-Claude and Ruzzene, Massimo (2007) Localization of energy in a perfectly symmetric bladed disk assembly due to nonlinearities. ASME Proceedings | Advances in Aerospace Technology, 1 . pp. 229-237.
Full content URL: http://dx.doi.org/10.1115/IMECE2007-41649
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Item Type: | Article |
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Item Status: | Live Archive |
Abstract
Although a bladed disk is typically designed to have identical blades, manufacturing tolerances, wear,
and other causes may cause random deviations among the blades. The blade-to-blade
discrepancies, denoted as mistuning, lead to vibratory responses mostly concentrated in small
regions of the bladed-disk assembly, according to a phenomenon called localization. The resulting
spatial confinement of the vibration energy causes the responses of some blades to become
dangerously high and increases the amplitude of the bladed-disk assembly's overall response. The
attendant increase in stresses can lead to premature high cycle fatigue (HCF) of the blades. In this study
we investigate whether vibration localization in a perfectly symmetric bladed disk assembly may
occur in the presence of nonlinearity. To this end, the nonlinear normal modes (NNMs) of a simplified
model of a bladed disk assembly are computed. The NNMs are then carefully examined to highlight
possible vibration localization phenomena.
Additional Information: | PROCEEDINGS ASME International Mechanical Engineering Congress and Exposition, IMECE2007-41649 |
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Keywords: | Localized NNMs, Georgiadis |
Subjects: | H Engineering > H310 Dynamics H Engineering > H143 Structural Mechanics H Engineering > H342 Vibration H Engineering > H300 Mechanical Engineering H Engineering > H140 Mechanics |
Divisions: | College of Science > School of Engineering |
ID Code: | 9496 |
Deposited On: | 30 May 2013 10:02 |
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