中文摘要：

以折弯式管道为例研究了输液管道系统的振动控制。首先，建立了输液管道系统的运动方程，但由于方程在离散过程中结构矩阵和流体矩阵的数值计算量过大，在计算过程中常出现溢出错误，因此使用模态缩减法简化矩阵以便于进行计算；其次，在高频振荡流体载荷的作用下，利用ANSYS Workbench的双向隐式迭代法计算管道系统的动力学特性；最后，建立带有节流孔板的管道系统有限元模型，研究了节流孔板对系统振动的抑制作用。计算结果表明节流孔板对输液管道系统的振动控制是非常有效的。

英文摘要：

Vibration control for liquid-conveying piping system was investigated in this paper with bending type piping as an example.Firstly, a kinetic equation of the system was established.However, in the process of finite element discretization,over flow errors occurred due to excessive numerical calculation of structural and fluid matrices.Therefore ,to facilitate the numerical calculation,a modal reduction technique was used to reduce the size of matrices.Secondly, dynamic characteristics of the piping system were calcu- lated numerically under the high-frequency excitation,by applying two-way implicit iterative method of ANSYS Workbench sofiware.Finally,a finite element model of piping system with throttle orifice was estab- lished, and vibration control effect of the throttle orifice was discussed as well,which results showed that the throttle orifice could control the vibration of liquid-conveying piping system effectively.