The critical flutter speed, along with the associated stability and safety of a folding-wing aircraft, has been evaluated for variable wing configurations based on traditional designs. Through theoretical analysis and numerical simulation validation, the contributions of parameters such as the hinge stiffness, sweep angle, and folding angle on the flutter and stability of the folding wing are investigated in detail. It is observed that under a specified safe hinge stiffness, the proposed variable-sweep folding-wing configuration can enhance the critical flutter speed at a dangerous folding angle. Through the joint manipulation of the folding and sweep angles, the aerodynamic drag of the folding wing was reduced, thereby enhancing its flight speed and flutter boundaries. This paper aims to provide novel insights into the design and stability analysis of variable-wing configurations.

中文翻译：

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外翼可变后掠角折叠翼的颤振特性研究


基于传统设计的可变机翼配置已经评估了折叠翼飞机的临界颤振速度以及相关的稳定性和安全性。通过理论分析和数值仿真验证，详细研究了铰链刚度、后掠角和折叠角等参数对折叠翼颤振和稳定性的影响。结果表明，在规定的安全铰链刚度下，所提出的可变后掠折叠翼构型可以提高危险折叠角度下的临界颤振速度。通过对折叠角和后掠角的联合操纵，减小了折叠翼的气动阻力，从而提高了其飞行速度和颤振边界。本文旨在为变翼构型的设计和稳定性分析提供新的见解。