CAJ | 학술논문

为了进行短舱安装位置参数的减阻优化设计研究，首先在 NURBS 样条基函数的基础上建立了多区域自由变形（FFD）技术，通过对 FFD 控制体框架边界条件的合理选取建立组合框架，实现了多个控制框架对复杂外形不同区域的自由变形参数化，采用多个控制框架的空间控制体对某型客机短舱安装位置进行减阻优化设计。试验设计取样之后应用随机权重粒子群算法和 Kriging 代理模型建立气动外形优化系统，对某型客机短舱水平位置和水平安装角进行气动优化设计。优化设计结果表明，设计后的短舱位置使得整个飞机在一定攻角范围内的阻力显著减小，从而证明了基于多区域自由变形技术建立的优化设计系统是合理和实用的。
위료진행단창안장위치삼수적감조우화설계연구，수선재 NURBS 양조기함수적기출상건립료다구역자유변형（FFD）기술，통과대 FFD 공제체광가변계조건적합리선취건립조합광가，실현료다개공제광가대복잡외형불동구역적자유변형삼수화，채용다개공제광가적공간공제체대모형객궤단창안장위치진행감조우화설계。시험설계취양지후응용수궤권중입자군산법화 Kriging 대리모형건립기동외형우화계통，대모형객궤단창수평위치화수평안장각진행기동우화설계。우화설계결과표명，설계후적단창위치사득정개비궤재일정공각범위내적조력현저감소，종이증명료기우다구역자유변형기술건립적우화설계계통시합리화실용적。
In order to conduct the drag reduction optimization design of install parameters of nacelle, multi-zone FFD technique is established based on NURBS (Non-Uniform Rational B-Spline)basis function in this paper.The composite frames are founded through choosing the boundary condition of FFD shape and lattice reasonably.Then,it can realize the FFD parameterized design of the multi-control frames for complex shape in different zones.This multi-control frame FFD technique is used to conduct drag reduction design of the install position of certain airliner nacelle.The aerodynamic optimization design system is established by combining FFD technique,random inertia weight PSO arithmetic and Kriging surrogate model.It process the aerodynamic optimization design by taking horizontal install position and horizontal torsion angle of cer-tain airliner nacelle as design variables,and the results show that the optimized nacelle has lower drag and better aerodynamic characteristic in certain attack angle.Therefore,the optimization design system based on multi-zone FFD technique established in this paper is reasonable and practical.