Investigation on Dynamic Characteristics of Spur Gear Transmission System with Crack Fault

To study the dynamic characteristics of spur gears with crack faults, it is essential to establish meshing stiffness model accurately. In this paper, time-varying (TVMS) and load-sharing ratio (LSR) were established by potential energy method, correctness TVMS was verified KISSsoft. The influence gear depth angle on LSR analyzed introducing into model. multi-degree freedom dynamics centralized parameters established. time-domain vibration different fault systems discussed, statistical indicators introduced quantitatively evaluate faults. results show that decreases due propagation, impact increases propagation. sensitivity propagation higher than angles; can be used monitor early research provide a reference for gearbox diagnosis.