Efficient interfacing of fluid and structure for aeroelastic instability predictions

An e$cient procedure for multidisciplinary computation of #uid and structure interaction problems of aerospace vehicles is presented. It features the use of Meshless Methods, Finite Elements, Rayleigh}Ritz, and Kernel Functions enabling the aeroelastic requirements to be included in design without demanding prohibitive computational e!orts. Improvements made are in terms of choosing meshless #uid}structure interface for displacement and aerodynamic load transfer, including nine modes in Rayleigh}Ritz, introducing Gradient Adaptive Trans"nite Element in Finite Element model, and taking into account deformations of structure in aerodynamic load calculations. Numerical results are presented for #utter and divergence type aeroelastic responses of lifting surfaces constructed of advanced composites and supper alloys at subsonic, supersonic, and hypersonic #ight velocities