基于Kriging代理模型的飞行器结构刚度气动优化设计  

Aircraft Structure Stiffness and Aerodynamics Optimization Design Based on Kriging Surrogate Model

作　　者：聂雪媛[1] 刘中玉[1] 杨国伟[1] NIE Xue-yuan LIU Zhong-yu YANG Guo-wei(Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China)

机构地区：[1]中国科学院力学研究所流固耦合系统力学重点实验室,北京100190

出　　处：《气体物理》2017年第2期8-16,共9页Physics of Gases

基　　金：国家高技术研究发展计划(863计划)(2014AA110501);国家自然科学基金(11672303)

摘　　要：大飞机具有轻质大柔性特点,使得气动/结构耦合作用增强,在设计过程中需要考虑这种耦合效应,直接调用CSD/CFD方法计算周期长,无法满足工程需要.代理模型方法由于能显著提高工程优化设计的效率,已广泛应用于飞行器气动外形优化设计中.采用Kriging方法建立代理模型,通过求解EI函数最大值得到需添加的样本点以更新代理模型,提高代理模型的拟合精度,结合改进的粒子群最优化方法对大飞机的结构刚度进行了优化设计.结果表明,该优化方法能够处理复杂目标的全局优化问题,在保证升力系数及纵向稳定性能不恶化的前提下,降低飞机巡航状态的飞行阻力.Light weight and flexibility of the large aircraft make aerodynamic and structural coupling strengthen, as a result, the coupling effect must be considered while designing the aircraft structure. CFD/CSD coupling method cannot meet the requirement of the engineering. The surrogate model method has been used in the aerodynamic shape design for its high efficiency. In the paper, an aerodynamic optimization method based on the Kriging surrogate model was established to opti-mize the structure stiffness. The method used the maximum expected improvement （EI） function for adding the sample points to improve the accuracy of the surrogate model, and adopted the revised particles swarm optimization algorithm. The results show that the optimization method based on Kriging surrogate model can deal with the complicated problem with global optimization, and the flight drag coefficient is reduced at cruise state while remaining the lift coefficient and longitu-dinal stability not worsen.

关 键 词：代理模型 结构刚度优化 改进粒子群优化方法 

分 类 号：V221.3[航空宇航科学与技术—飞行器设计]