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该文首次应用有限元线法构造三维单元对空间温度场进行分析。以矩形直条单元为例,简要的叙述了有限元线法三维空间单元对温度场分析的基本方法,并利用最小位能原理推导出矩形直条单元的常微分方程组和对应的边界条件。同时介绍了有限元线法温度场分析专用程序TFEMOL的特点和功能。最后,通过算例对其计算结果的正确性进行验证。
For the first time, finite element method is used to construct three-dimensional elements to analyze the temperature field. Taking rectangle straight cell as an example, the basic method of temperature field analysis of three-dimensional space element in finite element line method is briefly described, and the ordinary differential equations and corresponding boundary conditions of rectangular straight cell element are derived by using the principle of least potential energy. At the same time, the characteristics and functions of TFEMOL, a special program for temperature field analysis by finite element method, are introduced. Finally, an example is given to verify the correctness of the calculation results.