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介绍了三维刚架计算原理以及作者所编制的一种应用于ＰＣ微机的有限元程序．本程序用＂ＦＯＲＴＲＡＮ＂语言编写，采用半动态一维存储．引入了单元整体形函数矩阵，简化了单元非结点载荷与结点载荷的转换过程．可用于计算三维及二维刚架或桁架在多种载荷条件下的位移及杆端内力并可绘出结构的有限元模型、支承、受载及变形状况．通过一系列算例验证了程序的正确性．
This paper introduces the calculation principle of three-dimensional rigid frame and a finite element program which is compiled by the author and applied to PC microcomputer. This program is written in “FORTRAN” language and uses semi-dynamic one-dimensional storage. The unit shape function matrix is introduced, which simplifies the conversion process of unit non-node load and node load. It can be used to calculate the displacements of rod and truss in three-dimensional and two-dimensional rigid frame or truss under various load conditions and the internal force of the rod end, and can draw the finite element model, support, load and deformation status of the structure. Through a series of examples to verify the correctness of the program.