抄録
A new method - utilizing gear-vibration analysis and finite-element-method (FEM) analysis - for calculating the three-dimensional-vibration behavior of a multi-stage helical gear system including a gearbox has been developed. First, to predict three-dimensional multi-stage helical gear vibration, each gear was modeled with six-DOF (degrees of freedom) ; three translational motions, and three swing motions. Stiffness matrices for each gear shaft and for each tooth meshing were made and overlapped into a stiffness matrix for the total system. Next, an FEM model of the gear system, which included separate models for the gearbox, gear shafts, gear meshings, bearings, and legs of the gearbox, was made. The results of a three-dimensional gear-vibration analysis were input into the model, to obtain the vibration responses of the gearbox. The calculated eigen frequencies and vibration responses of the gearbox agreed well with measured values.
