基于分级优化的飞机翼面结构布局综合技术研究

Aircraft wing structural layout study based on hierarchy optimization

为了探讨飞机翼面结构主要纵横骨架的最佳布局问题,并提供符合工程实际的、用于概念设计阶段的飞机结构设计方法,本文采用分级优化与集成的策略,该策略分为三个层次。第一个层次为拓扑优化,并由此确定纵向骨架的个数与位置的最优布局;第二个层次为尺寸优化,它用来确定翼面的中间参数;第三个层次为稳定性准则优化,它确定横向骨架的个数与位置的最优布局。在分级优化的三个层次中,拓扑优化是独立的,尺寸优化与稳定性准则优化是相互耦合的。以国外某飞机机翼为例,结果表明本文提出分级优化的思路与所采用的集成方法是可行的,并且具有很好的数值效果。作者认为:它对从事飞机结构设计的人员有—定的指导性和参考价值,值得在飞机设计部门推广应用。最后,总结给出五点结论供参考。

In order to study the optimal layout problem about aircraft wing conceptual design and offer a new design approach for practical aircraft engineering, the authors presented a strategy of hierarchy optimization and integrated idea, in which lied three layers. The first one belongs to topology optimization that determines the optimal number and position of wing' s beams. The second one is size optimization that gives the intermediate parameters of wing structure. The third one belonges to stability criterion optimization that finds the optimal number and position of wing' s ribs. During the hierarchy optimization, the first layer is an independent optimization and two last layers are coupled with each other. A practical aircraft wing is utilized as an example and the optimal results show that the proposed method is feasible. Therefore, the authors supposed that it could give some advice and direction to aircraft designers. Finally five useful conclusions could be drawn from this research work, so the method is deserved to application in structure design department.