Dynamic Response and Fault Analysis of Spur Gear System with Tooth Root Crack

Root cracks in gears are a typical fault in gear transmission, posing significant risks to their operational reliability and safety. As a critical internal excitations of the gear transmission system, stiffness variation significantly influences the dynamic vibration behavior of gears. Accurate modeling of time-varying meshing stiffness (TVMS) is essential for diagnosing and understanding these faults.