Considering the effects of extended tooth contact (ETC), revised fillet-foundation stiffness
under double-tooth engagement region, nonlinear contact stiffness and tooth spalling defect,
an analytical model for time-varying mesh stiffness (TVMS) calculation of spur gears is
established. In addition, the analytical model is also verified by comparing the TVMS under
different spalling widths, lengths and locations with that obtained from finite element method.
The results show that gear mesh stiffness decreases sharply with the increase of spalling …