For engineering applications of the coupled CFD/CSD method,a general multi-block dynamic grid technology is developed based on modal superposition.Firstly,the structural modes are interpolated to surface grid of each component so that the coupled CFD/CSD calculations are performed on CFD grid.Secondly,the surface modes are interpolated to spatial grid by using the radial basis functions(RBF)and transfinite interpolation(TFI)hybrid dynamic grid method,the surface deformation and dynamic grid are obtained by superimposing the spatial modes.For elastic aircraft with rudder,rudder deflection is consid-ered as a structural mode,the dynamic grid for continuous rudder deflection is generated using the RBF matrix which is outputted after spatial modal interpolation.The dynamic grid technology is used to analyze the aerodynamic forces of control surface,flutter of wing,flutter of full configuration with store.The results show that the dynamic grid technology is applicable to different configurations and achieves efficient dy-namic grids generation.The calculated results are in good agreement with experimental data,dynamic grid generation is effective.
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