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Identification of constitutive properties of a laminated rotor at rest through a condensed modal functional.

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Title: Identification of constitutive properties of a laminated rotor at rest through a condensed modal functional.
Alternate Title: Identification des propriétés constitutives d'un rotor à cage d'écureuil à l'arrêt par une fonctionnelle modale condensée.
Authors: Mogenier, Guillaume1 guillaume.mogenier@insa-lyon.fr, Thouraya, Nouri-Baranger1, Dufour, Regis1, Durantay, Lionel2, Barras, Nicolas2
Source: Mécanique & Industries. Nov2010, Vol. 11 Issue 5, p309-326. 18p. 1 Black and White Photograph, 2 Diagrams, 4 Charts, 14 Graphs.
Subjects: Rotors, Rotational motion, Rayleigh quotient, Guyan method, Mathematical optimization
Abstract (English): Predicting the dynamic behavior of laminated rotors in bending requires the identification of the bending rigidity of the laminated core. An identification of constitutive properties is proposed on the rotor at rest, which is a first step for rotordynamics prediction. Modal parameters predicted and measured are included in a functional based on a hybrid Rayleigh quotient and combined with the Guyan method, the master degrees of freedom corresponding to the measurement points. The laminated core rigidity is extracted through a Levenberg-Marquardt minimization. [ABSTRACT FROM AUTHOR]
Abstract (French): Pour prévoir le comportement dynamique en flexion des rotors à cage d'écureuil, une procedure d'optimisation est proposée pour identifier la rigidité en flexion de la partie feuilletée. Les quantités modales calculées et mesurées sur un rotor feuilleté sont incluses dans une fonctionnelle basée sur un quotient de Rayleigh hybride et combinée à la méthode de condensation de Guyan. Les degrés de liberté de contour sont alors associés aux points de mesure. Une minimisation de Levenberg-Marquardt permet d'extraire la rigidité de la partie feuilletée. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Predicting the dynamic behavior of laminated rotors in bending requires the identification of the bending rigidity of the laminated core. An identification of constitutive properties is proposed on the rotor at rest, which is a first step for rotordynamics prediction. Modal parameters predicted and measured are included in a functional based on a hybrid Rayleigh quotient and combined with the Guyan method, the master degrees of freedom corresponding to the measurement points. The laminated core rigidity is extracted through a Levenberg-Marquardt minimization. [ABSTRACT FROM AUTHOR]
ISSN:12962139
DOI:10.1051/meca/2010045