立方和公式是有时在数学运算中需要运用的一个公式。该公式的文字表达为：两数和，乘它们的平方和与它们的积的差，等于这两个数的立方和；表达式为：(a+b)(a²-ab+b²)=a³+b³。
研究了变形体虚功原理的理论和建立方法，并将其用于建立接触问题有限元法计算公式。
The theory of virtual work principles of deformable bodies and the technique to derive their expressions are studied and applied to contact problems to build FEM formulas.
通过解传输线阻抗转移公式和终端输入阻抗的气隙电容表达式的联立方程得出了数值结果。
The numerical results were obtained in a table by solving the combined equation of transmission line impedance transfer equation and terminal input impedance expression in gas capacitance.
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