Study on Dynamic Characteristics of Distributed Power Wing Structure with Electronically Controlled Propeller

Considering the rigid-flexible coupling characteristics of distributed propeller/nacelle/wing, the structural dynamic equation of the coupling system is established by using the medium deformation beam theory and Hamilton principle. The variation trend of the vibration mode of the wing structure in the coupling system is calculated when the propeller speed, number and chord direction of the hub center deviate from the elastic axis of the wing. The results show that the propeller speed and the central chord offset of the hub mainly affect the first-order torsional modal frequency of the wing. With the increase of the speed or the offset, the first-order torsional modal frequency of the wing shows a parabolic or linear downward trend; In addition, due to the influence of the chord offset installation of the propeller, the first-order torsional and second-order flapping modes of the wing have a strong bending torsional coupling effect, and the flapping modes and flapping component modes are greatly affected by the speed and chord offset; The increase of the number of propellers makes the first-order torsional modal frequency of the wing decline sharply at high speed, resulting in the instability of the dynamic characteristics of the system.