Vibration analysis of a multi-stage gear system including drive mechanism elements (Proposal of three-dimentional vibration model and eigenvalue analysis of helical gear system)

We have developed a new method for building a vibration model of an actual gear-drive system. Each gear has six degrees of freedom : three translational and three rotational motions. Stiffness matrixes representing each gear shaft and tooth meshing were made and overlapped into one stiffness matrix for the whole system. This enabled easy modelling of complex gear-drive systems such as multi-stage gears and branched gears. The results are in good agreement with experimental results with respect to the major resonance frequencies and vibration modes.