基于Kriging代理模型的运输机机翼多学科优化设计

Multi-disciplinary Optimization of Transport Aircraft Wing Based on Kriging Surrogate Model

在传统的飞机设计中,并未在初步设计阶段充分考虑气动弹性问题,难以得到最优设计。在这样的背景下,本文以运输机机翼为研究目标,发展初步设计阶段的机翼气动/结构优化设计方法。采用基于Kriging代理模型的优化方法,在巡航状态下对运输机机翼进行了单点优化设计。气动学科采用全速势方程,结构学科采用Ansys有限元分析,以升阻比和结构重量为目标进行优化设计,初步验证了本文方法的有效性。

In traditional aircraft design, aero-elasticity is not taken into full consideration during preliminary design, therefore, it＇s difficult to get an optimal result. Under this background, this thesis researched on transport aircraft wing, developing aero-structure optimization design method in preliminary design stage. Kriging surrogate model was introduced to optimize the transport aircraft wing under cruise condition. Full-potential equation and Ansys were adopted separately in aerodynamic and structure disciplines. The optimization objectives are weight and lift-drag ratio, the effectiveness of the method is verified initially.