According to the ISO6336 standard, the meshing stiffness C of spur gears γ Defined as the average value of the total contact stiffness of a spur gear per unit tooth width during the meshing process, its calculation formula is:
In the formula, Ki is the stiffness of the spur gear, Ki=Fn/ δ， N/mm； Fn is the normal force acting on the spur gear teeth, N; N is the number of selected contact points; δ Is the total elastic deformation of the gear teeth, µ m. Δ It can be calculated by the Ishikawa formula.