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以瞬态傅里叶导热微分方程为基础,提出了一种处理多材质铸造过程边界条件的通用化方法,自主开发了基于有限元法(FEM)的多材质铸造过程温度场数值模拟软件。计算了工字型件空冷过程温度场以及多材质复杂铝合金铸件凝固过程温度场,并与ANSYS以及华铸CAE的模拟结果进行了对比。对比结果表明,空冷过程的温度场的最大相对误差为2.130‰,凝固过程温度场的最大相对误差约为2.064%,验证了温度场程序的正确性以及可靠性。
Based on the transient heat conduction differential equation, a universal method to deal with the boundary conditions of multi-material casting process was proposed and the numerical simulation software of multi-material casting process based on finite element method (FEM) was independently developed. The temperature field in the air-cooling process and the temperature field during the solidification process of multi-material and complex aluminum alloy castings were calculated and compared with the simulation results of ANSYS and HuaCao CAE. The comparison results show that the maximum relative error of the temperature field in the air-cooling process is 2.130 ‰, and the maximum relative error of the temperature field in the solidification process is about 2.064%, which proves the correctness and reliability of the temperature field program.