A method for identifying structural stiffness of aeroelastic wind tunnel model was proposed based on photogrammetry.With the known loads (bending moment or respectively torsional moment) acting on the static aeroelastic model,the changes of marking points’ 3D coordinates were measured by photogrammetry,and then the bending stiffness or torsional stiffness of model was solved.It was demonstrated by the numerical simulation and practical tests that compared with the traditional contact measurement method this model is useful and correct due to its better accuracy, shorter period and without additional stiffness.
