可以作为有限元学习的编程实例，以更好地理解有限元理论，并为进一步使用大型有限元软件打下基础。本文所涉及的有限元基本理论请参考章本照先生编著的《流体力学中的有限元方法》PP.156-165。-FEM can be used as learning programming examples to better understand the finite element theory, and to further the use of large-scale finite element software lay the groundwork. This paper involved the theory of finite element please refer to the chapter as a sign that the President "hydrodynamics of the finite element method" PP. 156-165.