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Instability zones identification in multiblade rotor dynamics

Sanches, Leonardo and Michon, Guilhem and Berlioz, Alain and Alazard, Daniel Instability zones identification in multiblade rotor dynamics. (2010) In: 11th Pan-American Congress of Applied Mechanics, 04-08 Jan 2010, Foz do Iguaçu, Brazil .

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Abstract

Helicopter ground resonance is an unstable dynamic phenomenon which can lead to the total destruction of the aircraft during take-off or landing phases. Studies have been developed by researchers which considered a simplified mathematical model. With the goal of further comprehend the phenomenon, predictions of unstable motions are done and compared. First, Floquet's theory is applied to solve the linear equations of motion including parametric and periodic terms. Then, the multiple scales method is applied on the nonlinear model. The analyses highlight that, by keeping the nonlinear terms in the equations, other instability zones are identified.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Proceedings of PACAM XI
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution: Université de Toulouse > Ecole des Mines d'Albi-Carmaux - EMAC
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Laboratory name:
Département de Mathématiques, Informatique, Automatique - DMIA (Toulouse, France) - Automatique, Dynamique et Interface des Systèmes - ADIS
Département de Mécanique des Structures et Matériaux - DMSM (Toulouse, France) - Dynamique des structures
Institut Clément Ader - ICA (Toulouse, France) - Modélisation des Systèmes et Microsystèmes Mécaniques - Comportement dynamique des structures
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Deposited By:Leonardo Sanches

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