有限元数值模拟：两种四边形元的计算比较

Finite Element Numerical Imitation： Tow Types of Tetragonum Element Calculation Comparison

文中综述了单元刚度矩阵和栽荷矩阵的形成，总体刚度矩阵和栽荷矩阵的形成，以及对边界条件的处理。比较了双线性元在两种不同坐标下的计算精度。

This paper reviews the formation of element stiffness matrix and loading matrix, formation of total stiffness matrix and loading matrix, and the process of boundary conditions. Meanwhile, it compared the computational accuracy of bilinear elements under condition of different coordinate.