Application of Continuation and Bifurcation Methods to Aeroelastic Rotor Blade Stability

D Rezgui, MH Lowenberg, M Jones, C Monteggia

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

6 Citations (Scopus)

Abstract

The present paper illustrates how continuation and bifurcation methods are applied to investigate the aeroelastic stability of helicopter blades over a range of flight and control parameters. The paper first compares the bifurcation results for flap-lag instability to those available in the literature, which are obtained using conventional methods. In this case, the continuation analysis is applied to a simple rotor system incorporating a rigid blade with flap and lag degrees of freedom with root springs to model the stiffness of hinges. The continuation analysis is then carried out to investigate the aeroelastic stability of rotor blades, where modal representation of the blade flexibility is used. The analysis is performed in hover and forward flight, within and beyond operating flight conditions. The significance of the typical bifurcations that the blade behaviour undergoes is discussed.
Translated title of the contributionApplication of Continuation and Bifurcation Methods to Aeroelastic Rotor Blade Stability
Original languageEnglish
Title of host publication37th European Rotorcraft Forum, Milan, Italy
Number of pages10
Publication statusPublished - Sep 2011

Bibliographical note

Conference Proceedings/Title of Journal: Proceedings of the 37th European Rotorcraft Forum
Conference Organiser: The European Rotorcraft Forum
Other identifier: 132

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