基于 CST 的三维机翼气动结构解析参数化建模与优化方法

To facilitate the large-scale exploration of design space and the design of aero-structural integration in the conceptual design stage， a three-dimensional parametric modeling and optimization method for wing aero-structural analysis was proposed by using the class-shape function transformation (CST) method. Based on the two-dimensional CST，the analytical function form of the three-dimensional CST parametric geometric model was deduced. Established by using the mesh adaptive discrete and structural feature extraction technology， the aero-structural analysis parametric model of the three-dimensional wing can support the rapid modeling and optimization of the aerodynamic structure integration simultaneously， including parameters of the wing geometry configuration， structural layout，structural size， material properties， etc. Besides， it can automate the modeling process for the geometric models with a wide range of parameterization and aero-structural models. By applying this method， the aerodynamic structure of a large scale wing can be optimized from a multidisciplinary perspective. This method was adopted to work out the design of optimal aerodynamic structure integration for a large aspect ratio wing. According to the optimization result，the number of beams was reduced from 2 to 1，the number of wing ribs reduced from 20 to 15，and the mass reduced by 26.1%.