变可信度模型在气动优化中的应用  

Application of Variable-Fidelity Models to Aerodynamic Optimization

作　　者：夏露[1] 高正红[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《应用数学和力学》2006年第8期947-953,共7页Applied Mathematics and Mechanics

基　　金：国家自然科学基金资助项目(10502043)

摘　　要：在气动外形优化中,采用近似模型管理结构(AMF)方法,对变可信度模型进行组织和管理.这样能够充分利用低可信度模型,将主要计算量集中在低可信度模型的优化迭代过程中.同时,采用高可信度模型监控优化过程,使最终的优化解收敛到高可信度模型上.最后,设计了零阶变可信度气动特性优化管理结构与搜索算法,对某飞翼型无人机的翼型进行了气动优化.优化外形的气动性能与初始外形比有所提高.实际结果表明所提出的方法具有良好的可行性和适用性.For aerodynamic shape optimization, the approximation management framework （AMF） method was used to organize and manage the variable-fidelity models. The method can take full advantage of the low-fidelity, cheaper models to concentrate the main workload on the low-fidelity models in optimization iterative procedure. Furthermore, it can take high-fidelity, more expensive models to monitor the procedure to make the method globally convergent to a solution of high-fidelity problem. Finally, zero order variable-fidelity aerodynamic optimization management framework and algorithm were demonstrated on an airfoil optimization of UAV with a flying wing. Compared with the original shape, the aerodynamic performance of the optimal shape is improved. The results show the method has good feasibility and applicability.

关 键 词：气动优化 变可信度 近似模型管理结构 

分 类 号：V221.3[航空宇航科学与技术—飞行器设计] O221[理学—运筹学与控制论]