Considering The Elastic Deformation Of The Wing Aerodynamic

At present, with the rapid advances in computational fluid dynamics (CFD) and computational structural mechanics (CSM), extensive studies have been carried out on the aerodynamic shape optimization and structure optimization methods for the wing. However, the aerodynamic performance and the structural deformation of the wing are tightly coupled. Therefore, the optimization design of modern wing needs for the integration of multiple disciplines, such as aerodynamics, structural mechanics.etc. The mutual interaction between aerodynamics and structural mechanics should be analyzed and considered during design process.In this study, the multidisciplinary aerodynamic-structure optimization design of the elastic wing was performed. The main aspects of this dissertation are as follows:1. 3D Euler equations were employed to obtain the aerodynamic force on the wing surface, and the aerodynamic force was applied to the structrual analysis.2. The parameter design lauguage of a structural finite element analysis software is used to make a program which can automatically performed modeling, grid generating, constraining and loading, solving and exporting the deformation displacement, the stress and structural weight.3. Aeroelastic analysis method based on Euler equations and structure finite element model has been developed. The problem of CFD program calling finite element program has been successfully solved and the data exchange between them also has been successfully solved. The effect of elastic deformation on aerodynamic performance and structure performance has been analyzed.4. The multidisciplinary aerodynamic-structure optimization design method of the elastic wing based on response surface methodology (RSM) has been studied.The design results show that lilt-to-drag ratio was increased and structural weight was reduced. The fitting error of response surface was less than 1%, which show thatthe present method is effective and feasible, and is very attractive for engineering application due to its high design capability.