摘要
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。
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.
出处
《水利水电技术》
CSCD
北大核心
2012年第3期19-22,62,共5页
Water Resources and Hydropower Engineering
基金
国家自然科学基金创新研究群体科学基金(51021004)
国家自然科学基金青年科学基金(50909072)
关键词
河床式水电站
流体单元
附加质量
流道
模态
hydropower station in river channel
fluid element
additional mass
flow channel
modal
