基于全矢量显式算法注射填充软件的研究与开发

Research and Development of a Simulation Solver with Fully Vectorial Explicit Algorithm for Injection Molding

基于前人模拟注射填充的显式算法,提出了一种新的全矢量化运算显式算法。对于各类注射填充的模拟,此算法避免了压力场的全局求解,矩阵操作仅在单元一级进行,通过反馈修正,在各时间增量步使已填充的区域满足不可压缩条件。由于避免了所有的全局耦合求解,计算代价与节点的自由度近似成正比,可实现填充模拟过程的高效运算。由于矢量化算法是完全脱耦的,容易实现并行计算。基于这种新算法,应用有限元法进行了注射填充仿真软件的初步开发。其填充模拟结果与商业软件MOLDFLOW的三维模拟结果比较,证实了该软件的有效性。

On the basis of previous explicit algorithm in mould filling simulation, a new explicit algorithm with fully vectorial operations is proposed, where the global solution for pressure field is eliminated. It remains only the matrix operations at element level, by a strategy of feedback correction, the incompressibility condition is maintained in the filled portion at each time step. As the algorithm is totally uncoupled, the computational cost is about linearly proportional to the degree of freedom number. Furthermore, this vectorial uncoupled algorithm can be easily parallelized for high performance computation with the new appearing multi-clusters, a first version of the software is developed simultaneously. The simulation results are compared with commercial software MOLDFLOW to show a proper performance.