The convergence of analysis in abaqus is the same as that of iterative method for solving linear equations, and both are based on the mathematical principle of series convergence. If there is no convergence, the calculation will generally fall into an infinite loop. In order to avoid this situation, the convergence judgment is added to the program.

The finite element method is also an approximate solution, and convergence is a criterion for judging that the result is infinitely close to the real result at the end of calculation.