Abstract
This paper presents the definitions and calculation methods for predicting torsional mesh stiffness equations for spur gears in mesh. The torsional mesh stiffness formula for meshing gears were developed from a series of finite element models including the effects of parameter variation of gear module, gear ratio, number of teeth and shaft diameter. The comparison between the formula results and FEA results shows that the formula accuracy is within the expected accuracy normally achieved with FEA models. The stiffness equations are also in a form readily useable for practical application in areas such as the investigation of static transmission error of gears and the simulation of gear system vibration.
