Basic frame of the computer simulation system for 3D flow of profile extrusion die was established. Its modules and functions were introduced. This system consists of 3 modules,which are pre process module,3D FEM simulation module and post-process module.

• 建立了异型材口模挤出三维流动计算机模拟系统的基本框架 ,介绍了其结构和功能 ,该系统主要包括前置处理、有限元分析和后置处理三大模块 ,有限元分析模块又包括对口模内幂律流体流动的分析模块、粘弹性PTT流体流动的分析模块以及粘弹性PTT流体三维挤出胀大的分析模块 ;