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分别用附加质量法和流体单元法对某水电站厂房结构进行有限元数值模拟,对模型进行模态计算,以流体单元法得出的计算结果为依据,将进水塔附加质量公式不断修正后计算模态,直到两种方法所得频率值相差不多且振型相同时为止。结果表明,水塔附加质量公式乘以0.1～0.2的修正系数可适用于河床贯流式水电站的流道层。
The finite element numerical simulation of the plant structure of a hydropower station is carried out by using the additional mass method and the fluid element method. The model is modeled. Based on the calculation results obtained by the fluid element method, the additional mass formula of the water tower is continuously revised and calculated Modal until the frequencies obtained by the two methods are approximately the same and the modalities are the same. The results show that the correction formula of water tower additional mass formula multiplied by 0.1 ~ 0.2 can be applied to the runner layer of riverbed tubular flow station.