Dynamic characteristics of aero-engine’s rotor under large maneuvering flight

Affiliation of Author(s):能源与动力学院

Journal:Vibroeng. Procedia

Abstract:In view of the large maneuvering overload of the rotor system in Unmanned Aerial Vehicle (UAV), the dynamic characteristics of rotor system under large maneuvering overload conditions were analyzed in this paper. The finite element model of rotor system under large maneuvering overload was first established by Timoshenko beam element theory and finite element method. The motion differential equations of the rotor system were derived by Lagrange equation, and the additional damping matrix, stiffness matrix and excitation force were obtained. Critical speeds and unbalance response were calculated by characteristic equation method and Newmark-β numerical integration method respectively. The calculation results showed that the additional damping and stiffness leaded the critical speeds of the rotor system to change under large maneuvering flight, and the additional excitation force resulted in a certain static displacement of the whirling orbits. © 2019 Nan Zheng, et al.

ISSN No.:2345-0533

Translation or Not:no

Date of Publication:2019-10-01

Co-author:Zheng, Nan,Kuang, Xi,Chen, Li-Jia,Liao, Xue-Min

Correspondence Author:lgh

Date of Publication:2019-10-01