The objective of this investigation is to conduct a parametric investigation on the aeromechanic stability of modern bearingless rotors. To ensure aeromechanic stability, modem bearingless; rotors use elastomeric dampers to augment the blade inplane damping. The augmented dampers are necessary to avoid aeromechanic instabilities such as air and ground resonance on soft-inplane rotors. The prevention of air and ground resonance depends largely on the damping level of the rotor-fuselage system during the critical frequency-crossing between the rotor and the fuselage inplane motions. The blade inplane damping, critical in ensuring aeromechanic stability of a rotor, depends not only on the damper sizes but also on the aeroelastic properties of the rotor blade. The results of this investigation provide insight into the source of inplane damping. The parametric study is carried out analytically using the University of Maryland Advanced Rotorcraft Code, or UMARC.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Parametric Investigation of The Aeromechanic Stability of Bearingless Rotors


    Contributors:

    Conference:

    National Specialist Meeting ; 1995 ; CT, United States


    Publication date :

    1995-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Aeroelastic Stability of Modern Bearingless Rotors - A Parametric Investigation

    Nguyen, K. / Ames Research Center / American Helicopter Society; San Francisco Bay Area Chapter | British Library Conference Proceedings | 1993



    Aeroelastic Stability of Modern Bearingless Rotors - A Parametric Investigation

    Nguyen, K. / Ames Research Center / American Helicopter Society; San Francisco Bay Area Chapter | British Library Conference Proceedings | 1994



    Aeroelastic stability of bearingless rotors in forward flight

    Dull, Andrew L. / Chopra, Inderjit | NTRS | 1987