大型水电站厂房振动问题研究综述

Review on powerhouse self-oscillation characteristics of a large-scale power station

随着水电站水轮机组单机出力和尺寸日益增大,特别是抽水蓄能电站的运行水头和转速不断提高,机组的水力稳定性与厂房结构振动等问题日益突出。本文从厂房结构振源、厂房结构自振特性和厂房结构动力响应分析三方面总结了大型水电站厂房振动相关的研究和应用成果。结果表明,建立全耦合整体仿真模型对于推动大型水电站厂房振动问题研究的发展具有积极意义。同时,对有待于进一步研究的问题提出了展望。

With the single-output and size of the hydropower turbines increasing day by day,especiallythe water head and rotational speed of the pumped storage power station improving continually,the hydrau-lic stability of the turbines and the structure vibration of the powerhouse as well as other problems have be-come increasingly prominent. From the three aspects of powerhouse structure vibration source,self-oscilla-tion characteristics and dynamic responses, the powerhouse vibration- related research and applicationachievement were summarized in this paper. The results show that creating a fluid-solid interaction finite el-ement model is of active significance for the powerhouse self-oscillation characteristics of a large-scale pow-er station.Also,some topics which are worth studying further were proposed.