基于Kriging方法的整流罩气动外形设计优化

摘要

研究基于Kriging近似方法的运载火箭整流罩气动外形设计优化问题。提出采用Kriging函数建立整流罩气动参数计算近似模型，解决运载火箭整流罩气动外形设计优化计算复杂性问题，推导了Kriging函数参数估计流程，给出其具体仿真实现方法；建立整流罩气动外形设计优化问题数学模型，采用基于Kriging函数的近似方法求解。仿真结果表明，提出的设计优化方法收敛速度快，优化方案平均阻力比基线方案减小22．2％，各项约束均得到良好满足。为飞行器气动外形设计优化研究提供理论参考。%The aerodynamic shape design optimization of fairing for launch vehicles based on Kriging approximate method was researched.In order to solve the computational complexity problem in aerodynamic shape design optimization of fairing,Kriging func-tion was introduced to establish the approximate model for predicting fairing aerodynamic parameter,the process for parameter esti-mation of Kriging function was deduced,and the specific implementation method was offered.The mathematic model for aerodynamic shape design optimization of fairing was established,and resolved with Kriging method.Simulation results show that convergence effi-ciency of proposed design method is more efficient,the average drag of optimal scheme is 22.2% less than the primary scheme,and all constraint conditions are well satisfied.All research finds can provide theoretical reference for aerodynamic shape design optimiza-tion of flight vehicles.