非圆截面弹体气动隐身一体化设计方法

从非圆截面弹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,采用了联赛式选择复制算子、小生境技术和Pareto解集过滤器技术使解集具有较好分布特性,并在此基础上应用了旨在提高优化计算效率的响应面方法.通过采用基于N-S方程的数值求解方法计算弹体气动性能,采用物理光学法和物理绕射理论来计算其雷达散射截面积,实现了基于Pareto遗传算法的非圆截面弹体气动与隐身两个目标函数间的折衷与优化,取得了较好的优化设计结果.

Integrated design of aerodynamic and stealthy performance for missiles with non-circular cross section

According to the aerodynamic and stealthy performance requirements in non-circular cross section configuration design, and based on the concept of multi-objective optimization, the Pareto method and genetic algorithm were combined and tournament selective reproductive operator, Niche and Pareto filters technology were used to get the results with favorable distribution. Further more, response surface methodology was proposed to improve optimization efficiency.The aerodynamic performance of the missile was calculated by N-S equation numerical method, and radar cross section was calculated by physical optics and physical theory of diffraction. Compromise and optimization between these two objective functions, aerodynamic and stealthy performance of non-circular cross sections based on Pareto genetic algorithm, were realized, and the results are satisfactory.