Static Aeroelastic Characterization of a Slender Straight Wing
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Abstract
The goal of the paper is to investigate the static aeroelastic characteristics of the slender straight (2D) wing using aerodynamic strip theory. The finite element method is employed to determine the wing divergence speed and aileron effectiveness. Galerkin’s method based on the principle of virtual work is used to get the influence coefficient of the straight wing. The aerodynamic strip theory with finite span correction has been used to relate elastic twist and lift coefficient. A MATLAB program is developed to obtain the approximate solution of static aeroelastic equilibrium equations for slender straight wings. The variation of divergence speed with the different locations of the elastic axis and its overall impact on the structural integrity is also examined. It is found that the divergence speed of the slender increases by 15% by adopting finite span correction to the strip theory. The mathematical model of the slender wing is validated with the computational studies carried out in ANSYS. The computational results revealed that the tip displacement of the wing increases rapidly near the divergence speed. Also, the wing characteristics seem to be good in agreement between computational and mathematical analysis.
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