中文摘要：

针对在强振动环境下工作的液压管道，建立振动液压管道梁模型，并结合管道流固耦合横向振动模型建立管道的主动减振模型。运用特征线和差分计算方法求解该数学模型，并且研究主动振动相位差、频率、作用位置和幅值对管道振动的影响规律，得到各减振参数对管道最大幅值和最大应力的影响曲线。发现当振动相位差为π时能使管道的最大幅值和最大应力分别降低44.55%和39.69%，并且适当调整其他三个参数有更佳的减振效果。研究结果表明，使用主动减振方法能够有效减小管道的振动，为管道主动减振提供一定的理论参考。

英文摘要：

A beam model of vibrating hydraulic pipes is established for analyzing the vibration performance of the hydraulic pipes under strong vibration environments. Combining with the pipe’s fluid- structure coupling transverse vibration mode, the model for active vibration control of the pipes is established. Using characteristic line and the finite difference method, the mathematical model is solved. The influence of phase difference, frequency, location and amplitude of the active vibration on the vibration of the pipe is studied. The influence curves of the damping parameters on the pipe’s maximum amplitude and maximum stress are obtained. It is found that when the vibration phase difference is π , the pipe’s maximum amplitude and maximum stress are reduced by 44.55 % and 39.69 % respectively. And the appropriate adjustments of the other three parameters can yield even better damping effects. This research indicates that using active damping method can effectively reduce the vibration of the pipes. It provides a theoretical reference for the pipe- active damping.