Investigation of Effects of Winglets on Wing's Aero-elastic Behavior

Taking large aerobus's wing as the based wing,a detailed analysis of the effects of winglets on wing??s aeroelastic behavior is carried out by numerical method in this paper,including static aeroelastic characteristics and flutter characteristics.Static aeroelastic response is studied through Loosing Coupling CFD/CSD Method.The aerodynamic performances of the wings with different winglets have been investigated by numerical method based on Panel Method,and the study of structure response is taken by Finite Element Method,this paper used Interpolation Method for transferring displacement and force data between fluid and structural meshes in a fluid-structure interaction simulation.Through modifying static finite-elements partially to get the dynamic finite-elements model which is used for analyzing flutter characteristic by MSC NASTRAN.The results show that the wings?? aeroelastic characteristic reduced with different degree after adding winglets,and the different winglets?? effects are dissimilar,it is obvious that the design of winglets must pay attention to the lose of structural characteristics in getting high aerodynamic advantages.