Multi-Objective Aerodynamic-Structural Optimization of Supercritical Wing of Wide Body Aircraft

摘要

A three-step multi-objective aerodynamic-structural optimization method for the supercritical wing of a wide-body civil aircraft is presented in this paper. In the first step, preliminary optimization, the objective is to test the influence for wing weight and drag coefficient while changing aspect ratio and sweep angle, as well as to get proper ranges of planform parameters for the second step. Full potential equation and empirical structure weight estimation are used for aerodynamic-structural solving. In the second step, semi-detailed optimization, structure parameters are included in the optimization. The main objective is to achieve an optimal structure model and minimal wing weight based on FEM. Finally, in the detailed optimization, the shapes of airfoils are considered and numerically optimized. Static aero-elastic model is included in the last step in order to get a well-balanced wing of aerodynamic efficiency and structural weight.