Experimental and numerical study of gear faults in gearbox: evaluation of dynamic stress fluctuations

摘要

Several studies were made on the effects of gear faults on vibrations and noise. Fault signatures were defined and procedures for fault detection were propsed. Now, the question is define fault thresholds. As an experimental determination does not appear simple, thresholds can be defined by comparing the dynamic tooth root stress due to a fault to a fatigue limit of the gear material and by relating the type and the depth of the fault to the vibration levels and tooth root increase.