And nonlinear memory viscoelastic melt was described by K-BKZ integral constitutive equation.Suitable iteration with rapid convergence was given to solve nonlinear equation.

• 同时采用K-BKZ积分型本构模型描述熔体的非线性记忆性，给出求解非线性方程组的迭代方法，取得较好的收敛性。