隐身性能约束的多目标气动外形优化设计

从飞机外形设计的总体、气动和隐身设计要求出发,根据多目标优化的基本概念,将Pareto方法与遗传优化搜索相结合,并采用了群体排序、基于共享机制的小生境技术和Pareto解集过滤器等技术使解集具有良好分布特性,在此基础上建立了一套可满足飞行器外形气动/隐身一体化综合优化设计优化模型和优化方法。文中针对飞行器外形优化设计要求,提出了复杂外形参数化和设计变量的选取原则。并根据某飞行器设计要求,进行了在以隐身特性为约束条件下,以亚声速和超声速气动特性为设计目标的飞行器外形综合优化设计,取得了良好的优化设计结果。

Multiobjective optimization design of aerodynamic configuration constrained by stealth performance

According to the configuration,aerodynamic and stealth performance requirement in aircraft configuration design,the optimization design model and analysis method of aircraft aerodynamic-stealth integration optimization design are built by combining the Pareto method and genetic algorithm based on the concept of multiobjective optimization.To get the results with favorable distribution,the Population sorting,Niche faring,Filters methods are used.For the design requirement,the parameterization of complicated aircraft geometry and design variables selecting principles are presented.To meet the design requirement,the aircraft configuration integral optimization is carried out considering the subsonic and supersonic aerodynamic performance as design objects constrained by stealth performance,and the optimization result is satisfying.