三峡电站厂房振动及测试

为保障三峡电站厂房在振动情况下的安全运行,采用有限元法对三峡电站厂房机组段进行自振特性分析和共振复核,并通过模型试验得到流道的脉动压力值,分析厂房结构在脉动水压力下的振动反应,计算结果显示满足振动控制标准要求。为验证分析结果,对在156m水位下机组运行时楼板的振动进行了现场测试。结果表明,实测数据与计算分析结果在幅值、频率和分布规律上较接近,建立模型计算脉动压力值施加于厂房后的计算厂房振动方法可行。

Vibration Test of Three Gorges Hydropower Station

To ensure the safe operation of Three Gorges hydropower station in vibration condition, finite element method is used to analyze natural vibration and resonance checking of generator in powerhouse. Simultaneously, pressure pulsation value is obtained with model test. And then the vibration response of pressure pulsation on powerhouse structure is analyzed. The results show that it meets the vibration control standard. Under operating condition of 156 m water level, the site test of floor vibration is implemented to verify the rationality of analysis results. It shows that the measured data is closer to the calculation results in amplitude, frequency and distribution laws. Establishing the model to calculate pressure pulsation value is a feasible method for applying to measure the vibration of powerhouse.