Both algebraic method and optimal elliptic partial differential equations are applied to generate multiblock grids.A rapid deforming technique is applied to generate dynamic grids.Finite volume method and dual time-stepping approach is used to solve the unsteady N-S equations, where Spalart-Allmaras One-Equation turbulence model is adopted to the simulations of turbulent flows.A predictor-corrector approach is emploied to solve the structural equations of motion.Then the unsteady N-S equations coupled with structural equations of motion are efficiently solved in the time domain.