The differential quadrature method (DQM) is applied to truncate the governing equation into a set of two-order ordinary differential equations with respect to time domain.

• 基于牛顿法推导出了输液曲管模型面内振动的非线性控制方程，利用微分求积法将系统的偏微分方程转化为关于时间域的二阶常微分方程组；