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压力钢管是水电站的一个重要组成部分.一旦发生事故,小则造成停电;大则使整个电站毁坏.过去对压力钢管设计,特别是露天钢管,往往忽略考虑钢管的振动问题.但在实践中,国内、外不少工程建成运转后,压力钢管发生不同程度振动的也不乏实例.我国东山寺、刘家峡水电站;日本池尻川、宇都野、渥赫马、美保,熊野川1号等水电站;法国努埃尔——布兰克湖抽水蓄能电站,都发生不同程度的振动.有些甚至使钢管破裂,造成工程破坏和人身伤亡,直接影响了电站的正常运行.因此,在压力钢管设计时,应该对钢管振动加以研究,以避免运行时发生振动.由于振动是一个复杂的问题,目前仍依靠经验公式,对可能发生的振动进行估计和对已经发生振动的钢管提供处理措施的依据.
The pressure pipe is an important part of the hydropower station .If an accident occurs, a small power cut occurs and a large power plant damages the whole power station.In the past, the design of the pressure pipe, especially the open pipe, often neglected to consider the vibration of the steel pipe.But in practice, Many domestic and foreign projects are completed and put into operation, there are also some examples of different degrees of pressure steel pipe vibration. China’s Dongshan Temple, Liujiaxia Hydropower Station; Japan’s Chi Xichuan, Udo Yeh, Woer Hema, the United States Paul, Kumano River No. 1 hydropower station; France Nuer --Blank Lake pumped storage power station, have varying degrees of vibration, and some even rupture of steel pipe, causing damage to the project and personal injury, a direct impact on the normal operation of the power plant.Therefore, the design of the pressure pipe, the steel pipe Vibration is studied to avoid vibrations during operation Since vibrations are a complex issue, empirical formulas are still in use today to estimate possible vibrations and to provide a basis for handling vibrations that have occurred.