有些压力管道如水电站的压力钢管,其剧烈振动现象许多国家都作过试验与研究。但此项问题的基本原因尚未弄清。不少研究人员如耶格通过试验证明,压力波动通常出现在下游。这就意味着,压力管道系统设计人员必须确定产生最大压力波振幅的频率,且须使该值限制在设计标准以内。压力波动即振荡的产生,会使叶片转动、导叶振动、尾水管内涡流带摆动或阀门振荡。根据齐尔凯的研究结果,水力系统产生激振后,就会出现持续振动的现象。在此情况下,问题只是确定保留在系统中的振动频 Some pressure pipelines such as hydropower station pressure pipe, the phenomenon of severe vibration test and study in many countries have been made. However, the basic reason for this problem has not yet been clarified. Many researchers, such as Yeager, have shown through tests that the pressure fluctuations usually occur downstream. This means that the pressure piping system designer must determine the frequency at which the maximum pressure wave amplitude is generated and limit this value to the design criteria. Pressure fluctuations that oscillation, will make the blade rotation, vane vibration, vortex within the draft tube swing or valve oscillation. According to the results of Zylkai’s study, after the excitation of the hydraulic system, there will be a continuous vibration phenomenon. In this case, the problem is simply to determine the frequency of vibration that remains in the system