By using the large finite element method software MSC.Marc

A 3-D nonlinear contact analysis model for a pair of spiral bevel gear with several meshing teeth pairs is established. Based on the model

A dynamic meshing simulation in the case of definite torque and rotary speed are carried out in a meshing period. The numerical results which indicating the variety of the contact status

the contact stress

the bending stress in the location of teeth root and the torque and rotary speed of gear pair vs. the different meshing position are presented

and show a very good agreement with the meshing rules in reality

and simultaneously

the rationality of the model is be verified. The result is used for the analysis of fatigue.