大展弦比弹性机翼梁腹板厚度优化设计

在设计机翼时,要求机翼不仅要具有足够的强度,而且还应具有足够的刚度,以保证其满足气动特性要求及其他要求。翼梁腹板厚度设计对机翼强度和刚度影响很大。所以,如何设计翼梁腹板厚度的展向分布,使机翼满足强度要求和刚度要求,是一个非常有意义的问题。本文针对某无人机机翼结构,研究了满足静强度要求、气动特性要求和副翼操纵效率要求的弹性机翼腹板厚度展向分布的设计方法。首先,根据无人机机翼气动特性设计要求设计机翼的刚度大小沿展向分布;然后,根据展向机翼刚度展向分布设计机翼腹板厚度分布;最后,分析该无人机在给定设计飞行状态下的强度和副翼操纵效率,并对其进行优化。

Optimization of Web Thickness Design for Large Aspect Ratio Elastic Wing

Both enough strength and enough stiffness are required to meet aerodynamic characteristic requirements and other requirements when designing wing structures. Web thickness has a great influence on the strength and stiffness of wing structure. So, it is meaningful to study how to design the spanwise distribution of web thickness to meet the strength requirements and stiffness requirements. In this paper, an unmanned vehicle wing structure is studied to find the design method of spanwise distribution of web thickness based on the requirements of strength requirements, aerodynamic characteristic requirements and aileron effectiveness requirements. First, design the stiffness distribution along the wing span based on the requirements of aerodynamic characteristic. Then, design the spanwise distribution of web thickness according to the spanwise distribution of stiffness. Finally, analyze the strength and aileron effectiveness of the unmanned vehicle under the certain design flight state, and then optimize the web thickness design.