A fluidlastic damper is a kind of novel lead-lag damper for a helicopter rotor, which possesses of stable dynamic properties but strong nonlinear performance. We have proposed dynamic equation of the rotor/fluidlastic damper coupling system to study the influence of fluidlastic damper dynamic characteristics on the helicopter rotor and calculated the response of the coupling system. The equivalent damping of the fluidlastic damper is identified from the response by decaying envelope-curves method, whose value is well consistent with that calculated by complex modulus method. Furthermore, the response of the coupling system with linear equivalent damping is found similar to that with nonlinear damping. Therefore, our linear model can basically reflect the dynamic properties of fluidlastic damper, promising the application of the equivalent damping of fluidlastic damper in predigesting aerodynamic stability calculation of the rotor/fluidlastic damper coupling system.


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    Title :

    Study on Equivalent Damping in Nonlinear Fluidlastic Damper of Helicopter Rotor


    Contributors:
    Wu, Shen (author) / Yang, Wei-dong (author)


    Publication date :

    2013


    Size :

    4 Seiten




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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