在高分子材料加工的数值模拟过程中 ,常采用粘度模型来描述高聚物的粘性行为 .Cross -Ar rhenius模型能够在各种温度、压力条件下 ,在剪切速率从 10 0 s-1到 10 4 s-1的变化范围内 ,相当精确地描述高聚物的粘性 .采用Gauss -Newton法 ,根据实验值 ,准确地拟合出粘度模型的参数值 ,此方法对初值选择的要求低、拟合结果的相关性好 ,方法通用性强 In the process of numerical simulation of polymer materials, the viscosity model is often used to describe the viscous behavior of polymers.Cross-Arrhenius model can be used under various temperature and pressure conditions at shear rates from 10 0 s -1 to 10 4 s-1, the viscosity of the polymer is described quite accurately.The Gauss-Nywton method is used to accurately fit the parameter values ​​of the viscosity model according to the experimental data. This method has low requirements for initial value selection The correlation between fitting results is good and the method is universal