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部分已建水电站的运行实践表明:厂房振动问题是影响水电站正常运行的主要因素之一,它不仅直接影响到机组的安全稳定运行,缩短检修周期和使用寿命,严重时还会引起整个厂房的振动,以至被迫停机,这就需要在设计和建设过程中进行相应的研究,采取有效措施,尽量防止厂房振动的发生,将损失减小到最小.本文以潘口电站厂房结构为研究对象,通过对结构与理想流体耦合问题的分析,采用迦辽金法推导了具有压缩性流体与固体流固耦合问题的动力有限元分析模型,模型考虑了流固耦合问题的附连水质量问题,利用三维有限元分析了厂房结构自振特性和在地震荷载作用下结构的动力特点,对厂房整体结构共振进行校核和评估,提高电站安全运行和管理.
The operation practice of some hydropower stations under construction shows that the vibration problem of the factory building is one of the main factors that affect the normal operation of the hydropower station. It not only directly affects the safe and stable operation of the hydropower station, shortens the inspection period and service life, but also causes the vibration of the whole plant , And even forced to shut down, which requires the corresponding research in the design and construction process, to take effective measures to minimize the occurrence of plant vibration, the loss is reduced to a minimum.In this paper, Pankou power plant structure as the research object, through Based on the analysis of the structural-ideal fluid coupling problem, the finite element analysis model of the fluid with solid-solid fluid coupling problem derived from the Galerkin method is deduced. The model considers the attached water quality problem of the fluid-solid coupling problem, The finite element method is used to analyze the natural vibration characteristics of the plant structure and the dynamic characteristics of the structure under the earthquake load. The overall structure resonance of the plant is checked and evaluated to improve the safe operation and management of the plant.