机翼气动结构多学科设计优化研究

为解决大展弦比机翼气动和结构学科的耦合分析及优化耗时问题,采用高精度计算流体力学(CFD)与计算结构动力学(CSD)模型耦合分析的方法,得到耦合分析后最终真实变形情况下的应力状态和气动力性能,指出大展弦比机翼气动结构耦合分析的必要性.对自适应响应面法进行改进,提出一种基于模糊聚类自适应径向基的全局优化策略,研究了该策略的全局寻优能力和优化效率.运用该优化策略对考虑气动结构耦合分析的大展弦比机翼结构进行多学科设计优化研究.研究结果表明该气动结构耦合分析方法可行有效,并且该优化策略提高了优化效率.

Research of Wings Aero-Structural Multidisciplinary Design Optimization

To solve the problems of aero-structural coupled analysis and optimization inefficiency, a wings aero-structural coupled analysis approach with high fidelity computational fluid dynamics (CFD) model and computational structural dynamics (CSD) model is researched. The affection of aerodynamics and structure before and after coupling is shown, which indicates the importance of aero-structural coupled analysis. Based on the global optimization strategy of adaptive response surface method (ARSM), a global optimization method using adaptive RBF based on fuzzy clustering (ARFC) is proposed, whose global optimizing capability and optimization efficiency is studied. A multidisciplinary design optimization of aero-structural coupled analysis using ARFC is implemented. It is demonstrated that the aero-structural coupled analysis approach is feasible and ARFC improves the efficiency of optimization.