一种基于四面体单元的变形翼骨架设计与分析

Variable configuration aircraft are of strategic significance in both military and civil fields. This study designs a morphing wing mechanism with characteristics of multi degree of freedom and distributed drive based on the tetrahedral element. Through comparative analysis of multiple schemes, the basic elements of the morphing wing mechanism are determined, a spherical joint which can realize the connection and rotation of adjacent tetrahedrons is designed, and the parametric analysis of the component and spherical joint is carried out. Kinematic analysis of the morphing wing mechanism is conducted based on the motion influence coefficient method, the mechanical properties of the deformation mechanism analyzed based on the finite element method and theoretical analysis, the driving parameter model including out-of-plane loads and skeleton gravity established, and the static loads of different actuators analyzed. Finally, a prototype is developed, and the multi degree of freedom deformation functions, such as variable sweep, bending and torsion, are verified by experiments.