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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。
In order to ensure the safe operation of the Three Gorges Power Station under vibrating conditions, the finite element method is used to analyze the natural vibration characteristics and resonance check of the power plant unit of the Three Gorges Power Station, and the pulsating pressure of the runner is obtained through model test. Vibration under pressure, the results show that the vibration control standards to meet the requirements. In order to validate the analysis results, the floor vibration of the unit at 156m water level was field tested. The results show that the measured data and the results of the calculation and analysis are close in amplitude, frequency and distribution. It is feasible to build the model to calculate the vibration of plant after applying the fluctuating pressure to the plant.