Abstract: Abstract: Considering the calculation accuracy and efficiency of rotor aeroelastic coupling analysis, the fully coupling aeroelastic method based on GEBT/VVPM/L-B is established. The dynamic model of blade is established by using the Geometrically Exact Beam Theory (GEBT), which can consider the large deformation effectively. The Viscous Vortex Particle Method (VVPM) and the L-B dynamic stall model are coupled to consider the viscous flow, the distortion of the wake and the unsteady aerodynamics of the airfoil. In each iterative step, the aeroelastic response is inserted into the aerodynamic computation module in a parametric form to realize the full coupling strategy. The c8534 flight of UH-60A is introduced for verification, and the effectiveness of the aeroelastic coupling method is verified by comparing with the experiment and the CFD/CSD tight coupling result. The results show that the proposed method can improve the computational accuracy significantly relative to the rigid rotor model; Compared with the CFD/CSD coupling method, the calculation efficiency can be improved by more than 54 times without affecting the calculation accuracy apparently; The rotor aeroelastic loads can be effectively predicted in solving the strong nonlinear aeroelastic responses, which verifies the robustness of the model.

Key words: Keywords: Viscous vortex particle method, Geometrically exact beam theory, Aeroelastic full coupling, Structural loads, Aeroelastic response