翼身组合体的变可信度优化设计  

Variable-fidelity optimization applied to wing-body configuration

作　　者：周婷[1] 吴宗成[1] 陈泽民[1] 朱自强[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《北京航空航天大学学报》2012年第7期962-965,共4页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：基于信赖域思想,发展了一种变可信度优化设计方法组织和管理不同可信度模型,有效利用低可信度模型建立近似模型,进行优化设计,高可信度模型仅修正优化近似模型,使最终优化结果收敛到高可信度模型上.采用全位势边界层有粘无粘迭代方法作为低可信度模型,多重网格Navier-Stokes方程方法作为高可信度模型,对翼身组合体进行优化设计,优化结果表明:发展的变可信度优化方法优化效率高,且能保证优化精度,具有实际的工程应用价值.Based on the trust region method,a variable-fidelity optimization method is developed to effectively manage and utilize low-fidelity models and high-fidelity models.The low-fidelity model was employed to build an approximation model in optimization process,while the high-fidelity model was used to correct the optimization approximation model and make the optimization results converged to high-fidelity model optimization results.The viscous and inviscid iteration of full-potential method and boundary layer method was chosen as the low-fidelity model and the multi-grid Navier-Stokes method was utilized as the high-fidelity model to optimize the wing-body configuration.The optimization results show that the method has not only high efficiency,but also good accuracy,therefore,is of practical meaning.

关 键 词：变可信度优化 信赖域 翼身组合体 设计 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]