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对平辊冷轧过程６ ～３６ 单元用体积可压缩法刚塑性有限元进行数值模拟， 研究了松弛因子发生的区间和对收敛性的影响。发现松弛因子在０ ．５ ～０ ．５９ 之间连续变化时程序收敛， 占取值区间的１０ ％ 。在收敛判据处理上， 电算表明如果泛函的一阶导数逐渐变小，迭代的速度增量逐渐变小至０ ， 或者速度变化和能耗率泛函变化逐渐变小， 则迭代收敛。
The rigid-plastic finite element method of volume compressible method for 6 ~ 36 units in the process of cold rolling of flat roll was numerically simulated, and the influence of the interval of relaxation factor and the convergence on convergence was studied. The relaxation factor is found at zero. 5 ~ 0. 59 continuous changes between procedures convergence, accounting for 10% of the value range. In the process of convergence criterion, the calculation shows that if the first derivative of the functional becomes smaller and the increment of velocity of iteration becomes smaller gradually, or the change of velocity and energy-loss functional decreases, the iteration converges.