Sensitivity analysis of a strongly coupled aero-structural system using the discrete direct and adjoint methods

This paper is dedicated to the sensitivity analysis of a static aeroelastic system with respect to design parameters governing its jig-shape. The gradients of interest are computed using either the discrete direct differentiation or adjoint vector methods. The aerodynamic load is predicted by the nonlinear Euler equations and transferred to the structure through a consistent and conservative procedure. The induced structural displacement field is computed using beam theory and the matrix of the aerodynamic influence coefficients. Finally, a threedimensional wing-body case is used to verify the successful implementation of the analytical sensitivity analysis methods.

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