The method in this paper is much more convenient than that of Lekhniskii's with biharmonic function.
本文的方法比列赫尼茨基的重调和函数法更为简便。
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.
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。
By using Green function, the boundary integral formula and natural boundary integral equation for the boundary value problems of biharmonic equation were obtained.
利用Green函数，根据双调和方程边值问题的边界积分公式和自然边界积分方程。
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