摘要
为了能够有效地降低飞机结构承力件的重量,针对飞机骨架,以加强框的概念设计为研究内容,通过对‘敏度阈值”概念的分析,指出其不足,提出了“改进的敏度阈值”概念,并与“约束补偿”策略结合而形成新的拓扑优化算法,用于加强框的材料布局设计.多个算例中的拓扑优化结果均显示其结构型式十分新颖,值得深入地探讨.
In order to reduce the weight of aircraft structures effectively, the skeleton of aircraft is treated in the conceptual design of strengthening frame. By analyzing the concept of ‘gradient threshold’ and pointing out its weakness, the author proposes the concept of ‘modified gradient threshold’ and combines it with the strategy of ‘constraint compensation’ to form a new kind of topology optimization algorithm for structural layout of a strengthening frame. The topology optimization results of several examples show that their layouts are good. We can see that, using the combination of CAD/CAE and topology optimization for aircraft strengthening frame conceptual design is feasible and that the proposed ‘modified gradient threshold’topology optimization algorithm is effective.
出处
《力学与实践》
CSCD
北大核心
2005年第4期26-31,共6页
Mechanics in Engineering
基金
航空科学基金(03853003)辽宁省博士科研启动
自然科学基金航空科学技术专项(20044007)共同资助
关键词
敏度阈值
拓扑优化
飞机加强框
约束补偿
弹舱设计
aircraft strengthen frame, conceptual design, topology optimization, gradient variable-threshold, constraint compensation
