Jixie chuandong (Aug 2022)
Meshing Behavior and Vibration Response of a Gear Pair Involving Eccentricity Errors
Abstract
To explore the influence of eccentricity errors on the dynamic characteristics of gear transmissions，a six-degree-of-freedom bending-torsional coupling vibration model of a spur gear pair with eccentricity error excitations is established by using the dynamics software Adams. The gear meshing stiffness and bearing support stiffness are theoretically calculated，and the numerical solution characterizing the meshing behavior and dynamic response of the system is obtained by GSTIFF integration method. The results show that the meshing related parameters such as gear pair center distance，meshing angle，contact ratio，backlash，transmission error and transmission ratio show time-varying characteristics under the influence of eccentricity errors，which increases the amplitude of vibration and dynamic loads of the gear system. And the modulation phenomenon appears with a series of sidebands related to eccentricity errors appearing near the meshing frequency. In addition，the existence of eccentricity errors changes the system vibration status，and makes the system vibration alter from single periodic response to quasi periodic response.
