The unsteady and dynamic stall aerodynamic behavior of airfoil at low Mach number was investigated,and the modified Leishman-Beddoes(L-B) model was modeled from the viewpoint of the convection of the flow on the airfoil surface.Based on the modified L-B model,the flutter analysis model of a two-dimensional wing with aerodynamic and structural nonlinearity at low Mach number was presented.The modification to L-B is effective by comparing with experimental airfoil airload results,and the wing flutter experime...