文中不仅对数值求解双调和方程的两种不同方法作了介绍，还利用该方程生成了典型的H型、C型、O型网格。
It is not only introduced the two measures taken to solve the biharmonic equations, but the topical grids of H-type, C-type, and O-type are generated with this equation.
根据二维双调和方程的特点并借助于MATHEMATICA软件，得到了应力函数双调和方程的多项式解答。
According to the nature of two-dimensional biharmonic equations, this paper obtains a polynomial solution of the biharmonic equation for stress function by means of the MATHEMATICA software.
本文采用调和势和双调和势法，导出了圆盘形夹杂外部弹性场的解析表达式。
The expression of the elastic field round the outside of the disk inclusion has been deduced analytically by the method of the harmonic and biharmonic potentials.
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