Browse/search for people

Publication - Dr Djamel Rezgui

    Application of Continuation and Bifurcation Methods to Aeroelastic Rotor Blade Stability

    Citation

    Rezgui, D, Lowenberg, M, Jones, M & Monteggia, C, 2011, ‘Application of Continuation and Bifurcation Methods to Aeroelastic Rotor Blade Stability’. in: 37th European Rotorcraft Forum, Milan, Italy.

    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.

    Full details in the University publications repository