河床式水电站流道水体附加质量 计算方法研究

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。

Study on method of calculation on additional mass of water in flow-channel of hydropower station in river channel

Finite element numerical simulation on the structure of the power house of a hydropower station and the modal calculation on the relevant model are respectively made with the additional mass method and fluid element method.Based on the result from the calculation made with the fluid element method,the modal is calculated along with the continuous revise of the additional mass formula for intake tower until no much difference between the frequencies with same vibration patterns got from the calculations by both the methods.The result shows thatif multiplied by a correction coefficient 0.1～0.2,the additional mass formula for intake tower can be applicable to the calculation of flow-channel of hydropower station in river channel.