Research on the Turn Life Testing System for the Nose Landing Gear of Carrier-Based Aircraft

As a crucial component of carrier-based aircraft, the nose landing gear is subjected to dynamic super-large turning loads, including tension, compression, and torque, during catapult launches. Therefore, higher demands are placed on the reliability and fatigue life of the nose landing gear under turning conditions. This paper analyzes four turning conditions of the nose landing gear, elucidating the turning mechanisms under these conditions. It examines the force interactions between the nose landing gear and the external environment and establishes a loading scheme for the turning control system of the nose landing gear for carrier-based aircraft. The design encompasses mechanical structure, hydraulic system, and integrated control system, achieving both internal and external loop active and passive torque loading, as well as combined tension-torque loading. Finally, a dynamic simulation of the loading system is conducted, and the results demonstrate that the simulation model accurately replicates the turn life testing system of the nose landing gear for carrier-based aircraft.