基于结构优化的大展弦比机翼质量估算

针对没有可供借鉴的质量评估经验公式来用于新式布局飞机研制的现状,为能够给出比较可信的结构质量估算,用于总体设计阶段飞机翼面结构质量指标分配,不仅对研制新机的概念设计与方案论证是十分重要的,也是必不可少的。本文开展了基于“变满应力”优化策略与有限元技术相结合的飞机翼面结构质量估算方法研究,并把这一求解过程搭建在具有自主知识产权的飞机多学科设计平台软件上。以具有大展弦比特征的“环球飞行者”外翼为例,进行结构质量估算表明:本文方法不仅可以获得用于总体设计阶段可信的质量结果,同时,其中的部件尺寸、应力和位移数据还能为结构与强度专业人员提供一定的参考意见。最后,得出4点结论。

Structure Weight Evaluation of a High-Aspect-Ratio Wing Based on Structure Optimization

Because of no available empirical formula of weight assessment for the development of new aircraft,seeking a reliable structure weight estimation approach is essential to allocation of structure weight targets to the wing in the aircraft conceptual design phase.In this paper,a wing structure weight estimation approach based on the combination of'variable full stress design'optimization strategy with finite element method is proposed and this solution procedure is constructed on the aircraft MDO platform.Then,this approach is applied to the high-aspect-ratio outer wing of the Global Flyer,as an example,to evaluate its weight.The results show that the proposed approach could give reliable structural weights for the conceptual and preliminary design.Meanwhile,the dimension,stress,and displacement data of some parts could provide some advice for structure designers and strength analysts.Finally,four conclusive remarks are given.