At last, the matrix equation for analyzing elastic foundation beam is held up by the equilibrium of node forces.
最后，由梁单元结点力平衡建立分析弹性地基梁的矩阵方程。
2
The analytical method of system of plane intercrossing forces is to calculate unknown forces by use of equilibrium equationof plane system of plane intercrossing forces.
平面汇交力系的解析法是用平面汇交力系的平衡方程计算未知力，其平衡方程最简单，但也最容易出错。
3
The numerical method of coupled boundary integral equation and finite element has been used to compute the forcesof wave diffraction and radiation on large two dimensional objects.