Analysis of Structural Characteristics of a Tandem-Wing Layout Vertical Takeoff and Landing UAV

The front wing (Frt-wing) and the after wing (Aft-wing) of the tandem-wing layout vertical takeoff and landing UAV are connected by supporting connecting rods to form the wing coupled configuration. It is of great engineering significance to study the influence of the supporting connecting rods on the structural characteristics of the tandem-wing layout UAV. Based on the structural preliminary design of the UAV, the structure finite element model of the wing coupled configuration and the wing uncoupled configuration were established. The aerodynamic load calculation model based on vortex lattice method is also established. The results of structural statics analysis of UAV show that the supporting connecting rods can improve the structural stiffness of UAV to a certain extent. The regular modal analysis of UAV shows that the supporting connecting rods has a great influence on the inherent modal characteristics of the UAV. The dynamic aeroelastic analysis shows that the wing coupled configuration can improve the static aeroelastic characteristics of UAVs to some extent and has higher flutter speed.