Research On The Influence Of The Elastic Deformation To The Aerodynamic Characteristics Of The Wing

At present, extensive studies have been carried out on the aerodynamic and structuremethods for the wing, and the development of the related disciplines of aerodynamics,structure mechanics has been perfect. However, the aerodynamic characteristic of wing isclosely related to the structural deformation. The cross of aerodynamics and structuremechanics leads to a new science-aero-elasticity. With the improvement of performance of theaircraft aero-elastic problem have become increasingly prominent, the aero-elastic analysis ofan increasingly important role in the design of aircraft. The aero-elastic problem has become adesign condition the aircraft designer must consider.Firstly, this paper introduced the development of aircraft aeroelastic. On the basis of aboveresearch, flexible structure modeling and analysis methods were given, and then, the twointerpolation methods including surface spline function method and linear spline functionmethod were proposed. The paper introduces the principles and equations of motion for staticaero-elastic problems, which involving reverse the divergence load, load redistribution andoperating efficiency.Finally, aiming to the some aircraft wing, using the two methods calculated the staticaeroelastic problems under the fixed angle of attack and different mach number. This paperobtained the lift coefficient, torque coefficient and maximum deformation under the rigid andflexible conditions, and the analysis and discussion to the result were given. The resultsindicate that the changes of the lift coefficient and maximum deformation were in the elasticallowable range. The calculated results were consistent with the theory results, which verifythe method is feasible and efficient.