摘要
隐身无人机的外形设计需要兼顾气动、隐身性能,协调气动、隐身两学科的矛盾。为了进一步挖掘无人机的性能潜力,采用多学科优化设计方法对外形进行精细化设计。首先,建立了适用于均匀介质目标的雷达散射截面积(RCS)梯度求解的伴随方法,将带有隐身材料的目标等效为均匀介质体进行分析,采用PMCHWT (Poggio-MillerChang-Harrington-Wu-Tsai)方程求解RCS。其次,结合雷诺平均Navier-Stokes方程求解器、自由曲面变形参数化方法、逆距离权重网格变形算法、序列二次规划算法和伴随方法,搭建了气动隐身多学科梯度优化设计系统。最后,对某无人机的外形进行气动隐身优化设计。结果显示,优化后外形的气动隐身性能均有提高,验证了本文方法的有效性。
The shape design of the stealth UAV needs to give consideration to both aerodynamic and stealth perfor⁃mance and balance these two disciplines.To further tap the potentials of UAV,this paper adopts a multidisciplinary optimization design method to refine the shape.Firstly,an adjoint method for solving the gradient of Radar Cross Sec⁃tion(RCS)of a homogeneous medium target is established.The target with the stealth material is treated as a homo⁃geneous medium.The RCS of the homogeneous medium is solved by the Poggio-Miller-Chang-Harrington-Wu-Tsai(PMCHWT)equation.Secondly,a multidisciplinary gradient optimization design system for aero/stealth is established by combining the Reynolds average Navier-Stokes equation solver,the free form deformation parameterization method,the inverse distance weight mesh deformation algorithm,the sequential quadratic programming algorithm,and the adjoint method.Finally,the aero/stealth optimization design of the shape of a UAV is carried out.The results show that the aerodynamic and stealth performance of the optimized shape is improved,which verifies the effective⁃ness of the method proposed.
作者
黎明
陈娇娇
周海
陈颖闻
白俊强
LI Ming;CHEN Jiaojiao;ZHOU Hai;CHEN Yingwen;BAI Junqiang(Chengdu Aircraft Design and Research Institute,Chengdu 610091,China;School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2024年第17期126-138,共13页
Acta Aeronautica et Astronautica Sinica
关键词
伴随方法
PMCHWT
矩量法
RANS
多学科优化
气动隐身
adjoint method
Poggio-Miller-Chang-Harrington-Wu-Tsai(PMCHWT)equation
method of moments
RANS
multidisciplinary optimization
aero/stealth
