Dynamic analysis of two-degree-of-freedom airfoil with freeplay and cubic nonlinearities in supersonic flow |
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Authors: | Hu-lun GUO Yu-shu CHEN |
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Institution: | School of Astronautics, Harbin Institute of Technology, Harbin 150001, P. R. China |
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Abstract: | The nonlinear aeroelastic response of a two-degree-of-freedom airfoil with freeplay and cubic nonlinearities in supersonic
flows is investigated. The second-order piston theory is used to analyze a double-wedge airfoil. Then, the fold bifurcation
and the amplitude jump phenomenon are detected by the averaging method and the multi-variable Floquet theory. The analytical
results are further verified by numerical simulations. Finally, the influence of the freeplay parameters on the aeroelastic
response is analyzed in detail. |
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Keywords: | freeplay cubic nonlinearity averaging method limit cycle oscillation amplitude jump phenomenon |
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