Spur gear contact is a typical nonlinear problem, and its solution process generally needs iterative calculation. There are problems of solution convergence and calculation efficiency.
In the finite element simulation of spur gear contact, the equation solver is selected as the front solver, and its error control is set as 1e-6; The Newton Raphon equilibrium iteration option (nropt, auto) automatically selected by the program is selected for the iteration of the solution process. If necessary, it will automatically activate the adaptive descent factor to help convergence, and open the options such as nonlinear large deformation effects, predictor and auto step; Set the time step to 1, and set the number of sub steps to 20, the maximum number of sub steps to 20, and the minimum number of sub steps to 10. The convergence curve of smooth spur gear contact nonlinear solution is shown in the figure.