铰链式下垂前缘机构设计与动力学仿真研究

The drooping front leading edge is a simple lifting device，which can effectively reduce the aerodynamic noise and the motion space of the mechanism. It has been applied to A380 and A350XW. In order to realize the fix⁃ ing rotation of drooping leading according to given requirement，it is necessary to design a drooping front mecha⁃ nism type，so a design method of hinged drooping front mechanism based on four-link is proposed in this paper. Ac⁃ cording to the design input requirements，the wire frame model of the droop leading edge mechanism is estab⁃ lished，and the kinematics and rigid-flexible coupling dynamics simulation of the mechanism are carried out. The angle variation parameters，and driving moment and the hinge point load in the mechanism are obtained. The re⁃ sults show that，with the uniform rotation of the driving arm，the hinged droop front can be steadily reduced by 26°，the ratio of the maximum driving torque of the two driving planes is close to 3∶2，and the lateral load at the driving position is improved by the setting of the side strut. The design of the mechanism is reasonable，and provides a good reference for the design of modern civil aircraft.