Influence Analysis of the Gear Manufacturing Error on Transmission Vibration Response

Gear transmission error (TE) is one of the internal excitation on transmission system vibration and noise. The vibration analytical model of transmission system was constructed by considering the dynamical characteristics of a gear box, which were verified by comparing the modal frequency and mode shapes between simulation results and experiment data. The vibration and radiated noise of transmission was analyzed by the transmission NVH test data. The mechanism of load conditions, TE, and system resonance influence on transmission system vibration and noise are investigated in details. Based on the vibration analysis model, the effects of pitch error, helix tilt deviation, and radial runout error on gear pair meshing characteristics and system vibration response are studied individual. The analysis results show that with the increase of pitch deviation and radial runout error, the harmonic transmission error of gears increase in varying degrees; the large helix tilt deviation not only affects the amplitude of vibration, but also reduces the frequency of main resonance peak.