基于有限元法的空冷过程温度场数值计算及程序开发

Temperature-Field Numerical Calculation During Air-Cooling and the Development of Program Based on the Finite Element Method

温度场的正确计算对于在热加工以及冷却降温过程中零件的成形质量以及缺陷预测具有重要的指导作用。本文介绍了瞬态导热方程的数学模型、有限元离散过程、关键技术以及自主开发有限元计算程序的整体思路及算法流程,并利用自己开发的能够对复杂零件空冷过程温度场进行模拟计算的程序计算了一个钢球和一个实际复杂结构件冷却降温过程温度场,分别与解析解和ANSYS计算结果进行了对比,模拟结果均吻合良好。

The correct calculation of the temperature field always has an important guiding function in the quality and prediction of the defect of molded parts in the cooling process.This paper introduces the mathematical model and the discretization process based on the finite element method （FEM） of the transient heat conduction equation,and the key technologies of transient temperature field numerical simulation together with the whole design idea and algorithm flowchart of the self-developed program are also introduced.The temperature field of a complex part and a calculation of the temperature distribution of a steel ball and an actual complex structure were calculated by the self-developed program,which matches well with the results calculated by analytical solution and ANSYS.