基于双层弹性连接的气动变弯度机翼结构设计

Design and Research of Pneumatic Variable Camber Wing Structure Based on Double-Layer Elastic Connection

变弯度机翼是未来先进飞行器的重点研究方向之一,机翼结构刚度和弯曲变形能力之间存在的固有矛盾是变弯度机翼结构设计的难点。本文设计了一种新型的结构与功能一体化变弯度机翼结构。基于自然界中含羞草的感性运动机理,一方面在变弯度翼肋的弹性变形区布置双层阵列M型弹性连接件,以兼容结构刚度和柔性变形的要求;另一方面在翼肋内嵌气动肌肉,满足翼型变形驱动的同时,维持整体翼型结构刚度。通过原理样机的仿真分析与实验测试,结果表明该变弯度机翼设计可满足实现向上13.5°以及向下9.5°的弦向弯度变化效果,从而验证了该变弯度机翼结构设计的可行性。

Variable camber wing is one of the key research directions of advanced aircraft in the future.The inhe-rent contradiction between the rigidity of wing structure and the bending deformation ability is the difficulty in the design of variable camber wing structure.In this paper,a new structure and function integrated variable camber wing structure is designed.Based on the inductive motion mechanism of mimosa in nature,on the one hand,a double-layer array M-type elastic connector is arranged in the elastic deformation zone of the variable camber ribs to meet the requirements of structural stiffness and flexible deformation.On the other hand,the aerodynamic muscle is embedded in the ribs to meet the airfoil deformation drive while maintaining the overall airfoil structural stiffness.Through simulation analysis and experimental test of the prototype,the results show that the variable camber wing design can meet the camber change effect of 13.5°upward and 9.5°downward,thus verifying the feasibility of the variable camber wing structure design.