This paper presents an analytical feature for limit cycle oscillation (LCO) in the nonlinear aeroelastic system of an airfoil, with major emphasis on its applications in LCO quantification. The nonlinear stiffness is modeled as the product of the pth power of vibration displacement and the qth power of velocity, with its coefficient as a stochastic parameter. One interesting finding is that the LCO amplitude is directly proportional to the 1/(1-p-q)th power of the coefficient, whereas the frequency is independent of the coefficient. Based on this feature, the statistics and distribution functions of the LCO amplitude are obtained semianalytically, which are validated by Monte Carlo simulations. In addition, we discuss the possible influences of the nonlinear stiffness on flutter suppression of the airfoil subjected to Gaussian white noises. Surprisingly, increasing the nonlinear stiffness alone does not necessarily reduce the vibration amplitude as expected. Instead, it may sometimes induce disastrous subcritical LCOs with much higher vibration amplitudes.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Quantification of Limit Cycle Oscillations in Nonlinear Aeroelastic Systems with Stochastic Parameters


    Beteiligte:
    C. C. Cui (Autor:in) / J. K. Liu (Autor:in) / Y. M. Chen (Autor:in)


    Erscheinungsdatum :

    2016




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Computational and Experimental Investigation of Limit Cycle Oscillations of Nonlinear Aeroelastic Systems

    Essam F. Sheta / Vincent J. Harrand / David E. Thompson et al. | AIAA | 2002



    Aeroelastic Limit Cycle Oscillations on a 3D Wing

    Dequand, S. / Mortchelewicz, G. D. / Sens, A. S. | British Library Conference Proceedings | 2017


    Identification and Control of Limit Cycle Oscillations in Aeroelastic Systems

    Thomas W. Strganac / Jeonghwan Ko / David E. Thompson | AIAA | 2000


    Identification and Control of Limit Cycle Oscillations in Aeroelastic Systems

    Strganac, T. / Ko, J. / Thompson, D. et al. | British Library Conference Proceedings | 1999