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微观组织模拟计算规模庞大,对宏观铸件进行整体微观组织模拟存在极大困难,为此该文将CA(cellularau-tomaton)模型与宏观的传热计算相结合,模拟砂型和金属型铝合金铸件的凝固组织形成过程,提出了改进的CA模型,用更接近实际晶粒轮廓的方法对微观组织进行模拟。在串行算法的基础上开发了相应的并行算法,该算法在保证原有计算精度的前提下,极大地提高了计算规模和效率。对试验结果和模拟结果进行了对照分析,二者基本一致。
It is very difficult to simulate the whole microstructure of macroscopic castings because of the large scale of microstructure simulation calculation. Therefore, this paper combines the model of cellularau-tomaton (CA) with macroscopic heat transfer calculation to simulate the microstructure of sand cast and aluminum alloy castings Solidified tissue formation process, an improved CA model is proposed, with a closer to the actual grain contour of the microstructure simulation. On the basis of the serial algorithm, a corresponding parallel algorithm is developed, which greatly improves the computing scale and efficiency under the premise of ensuring the original calculation accuracy. The test results and simulation results were compared and analyzed, the two are basically the same.