Development of a Code for Aeroelastic Optimization of Wings with Stress Constraints Aggregation

The development of an open-source code for the multidisciplinary design optimization related to the aero-structural optimization of wings is presented. This work is the result of a series of studies done thanks to the cooperation of ISAE and ONERA. The aim of this work is to develop an optimization process able to maximize the performance of a wing modifying its geometry out of respect of the constraints imposed, considering the aeroelastic coupling between aerodynamics loads and structural displacements. In order to manage a huge number of constraints, a constraint aggregation method is presented, based on the Kreisselmeier-Steinhauser function. It’s also presented a reduced model in relation to the aeroelastic coupling in order to reduce the computational cost. The code is entirely written in Python, while external softwares are used in order to perform aerodynamic or structural analysis. Practical examples on common wings, like the Goland wing or NASA Common Research Wing CRM is presented.