从构造基函数入手建立形函数

Describing Shape Function by Means of Making Basic Function

在有限单元法中，形函数用于描述单元内位移分布，决定着单元的特性．本文提出的从构造基函数入手建立形函数的方法，与传统方法相比显得十分简单明了而有效．

Shape function used for describing displacement distribution in element determines the speciality of the element in the finite element methods. In this paper, a means of describing shape function by making use of basic function is provided, and it is proved that this method is more concise and efficient as compared with the traditional methods.