Reference : LOCALIZATION OF ENERGY IN A PERFECTLY SYMMETRIC BLADED DISK ASSEMBLY DUE TO NONLINEARITIES
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Mechanical engineering
Physical, chemical, mathematical & earth Sciences : Mathematics
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/18272
LOCALIZATION OF ENERGY IN A PERFECTLY SYMMETRIC BLADED DISK ASSEMBLY DUE TO NONLINEARITIES
English
Georgiades, Fotios mailto [University of Liege > Aerospace and Mech. Eng. Dept. LTAS-Vibration and Identification Group > > >]
Peeters, Maxime [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Kerschen, Gaëtan mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Golinval, Jean-Claude mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Ruzzenne, M. mailto [Georgia Institute of Technology Atlanta, Georgia > School of Aerospace Engineering > > >]
Nov-2007
ASME Internaional Mechanical Engineering Congress and Exposition, Seattle, 2007
Yes
International
ASME Internaional Mechanical Engineering Congress and Exposition
November 11-15, 2007
ASME 2007
Seattle, Washington
USA
[en] Localization phenomena ; nonlinear normal modes ; vibrational energy ; BLADED DISK ASSEMBLY
[en] 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.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/18272

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