南京航空航天大学学报2025，Vol.57Issue(2)：243-251,9.DOI:10.16356/j.1005-2615.2025.02.004
分布式推进旋翼飞行器回转颤振特性研究
Research on Whirl-Flutter Characteristics of Distributed Propulsive Rotorcraft
摘要
Abstract
Aiming at the problem of whirl-flutter dynamics of distributed propulsion rotorcraft in high-speed forward flight state,this paper proposes a highly versatile,fast and efficient distributed multi-rotor/tilt-wing coupled aeroelastic dynamics analysis method.Based on the theory of moderately deformed beams,this method takes into account the elastic and inertial coupling between the rotors and the wings.By using the strip theory corrected by CFD,a distributed multi-rotor/tilt-wing aeroelastic dynamics analysis model is established to study its whirl-flutter characteristics in the forward flight state.After proving the accuracy of the analysis method,this paper also studies the influence of the dynamic parameters of the coupled system(such as the wings,nacelles and rotors,etc.)on the critical whirl-flutter speed of the aircraft.The results show that the system first experiences torsional instability and then in-plane bending instability.The torsional stiffness of the wings has the greatest influence on the critical flutter speed of the system,followed by the out-of-plane and in-plane bending stiffness.The three-dimensional effect of the flutter motion is obvious,presenting as the coupling of the torsional and in-plane and out-of-plane bending modes of the wings.Opening the lift rotors and increasing the number of rotors at low speeds can effectively increase the aeroelastic stability of the system.The flapping stiffness of the hinge-less blades has little influence on the critical flutter of the system.Increasing the rotor thrust and reducing the rotor speed are beneficial to increasing the critical flutter speed of the system,while increasing the height of the rotors and nacelles will reduce the critical flutter speed of the system.关键词
分布式推进/倾转机翼/气弹动特性/大展弦比/回转颤振Key words
distributed propulsion/tilting wings/aeroelastic characteristics/large aspect ratio/whirl-flutter分类
航空航天引用本文复制引用
程毅,余智豪,王司文,赵金瑞..分布式推进旋翼飞行器回转颤振特性研究[J].南京航空航天大学学报,2025,57(2):243-251,9.基金项目
直升机动力学全国重点实验室基金(2023-HA-LB-067-08). （2023-HA-LB-067-08）
