复合材料格栅加筋结构稳健性优化设计  

Robust Optimum Design of Composite Grid Stiffened Structure

作　　者：陈亮[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《飞机设计》2011年第4期17-23,共7页Aircraft Design

摘　　要：先进复合材料格栅加筋结构有较高的结构效率和较好的设计性能,在航空航天领域有着广泛的应用。本文采用等效平铺刚度模型对格栅结构进行了力学分析,指出其屈曲载荷的求解方法,并用区间方法对工程中的非概率不确定因素进行定量,用遗传算法对格栅结构进行了可行稳健性优化设计。将稳健性优化的结果与传统优化的结果进行了比较,结果表明,稳健性优化得到的结构质量要高于传统方法,但结构的可靠性和稳健性显著提高。Advanced composite grid stiffened structure（AGS） is widely used in aeronautic and aerospace field for its high efficiency and designable advantage.The buckling load is calculated based on the parametric smear model analyzing.The interval analysis model is used to show the uncertainty of the structure in the engineering application.The robust optimization of the AGS is carried out through the genetic algorithm.The result of the robust optimization is compared with the conventional optimum.Although the weight of the structure obtained from the robust optimization is heavier than the results generated by the conventional method,the reliability and robustness of structures are improved obviously.

关 键 词：复合材料 格栅结构 稳健性设计 区间分析 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程]