分析模型参数化建模在飞机多学科优化设计中的应用  

Application of Parameterization of Analysis Model in Airplane Multidisciplinary Design Optimization

作　　者：马铁林[1] 马东立[1] 张朔[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：《航空学报》2008年第6期1576-1580,共5页Acta Aeronautica et Astronautica Sinica

摘　　要：论述分析模型参数化建模在飞机多学科优化设计中的重要意义,提出一种机翼气动与结构分析模型参数化建模方法。优化设计变量与机翼气动计算网格的中间参数变量用于描述机翼气动网格变形情况,并建立结构有限元网格与优化设计变量的空间变化关系,实现机翼气动/结构多学科优化设计模型的参数化描述。气动性能计算采用基于N-S方程的计算流体力学方法,利用试验设计方法(DOE)和响应曲面模型(RSM)技术构造气动响应曲面用于优化设计,结构计算调用MSC/NASTRAN完成。采用Pareto遗传算法对一大展弦比复合材料机翼模型进行了多学科优化设计分析,得到Pareto前沿面和可选方案以供决策者选择。In this article the significance of parameterized analysis model in airplane multidisciplinary design optimization （MDO） is discussed,and a method of parameterizing wing analysis model is presented. Interim variables between the optimization variables and the aerodynamic grids are designed and used to describe the change of the wing aerodynamic grids,and the relationship between the structure finite element model and the optimization variables is established;thus a parameteriazed model for aerodynamic and structrure MDO model is constructed. Computational fluid dynamics based on N-S equations is used for aerodynamic characteristic computation,and aerodynamic response surfaces are built by the design of experiment （DOE） and response surface model （RSM） technology for aerodynamic optimization. MSC/NASTRAN is used for structure analysis. A large-aspect-ratio wing of composite materials is optimized using Pareto genetic algorithm. A Pareto front and a number of feasible scenarios are obtained for selection by decision-makers.

关 键 词：参数化建模 多学科优化设计 Pareto前沿面 大展弦比机翼 

分 类 号：V221[航空宇航科学与技术—飞行器设计] V211.4