大型水电站厂房结构流固耦合分析  

Analysis of fluid-solid interaction vibration characteristics of large-scale hydropower house

作　　者：张存慧 马震岳[2] 周述达 张运良[2] 

机构地区：[1]长江勘测规划设计研究院,武汉430010 [2]大连理工大学水利工程学院,辽宁大连116024

出　　处：《水力发电学报》2012年第6期192-197,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(50679009);辽宁省教育厅重点实验室科研项目(2008S045)

摘　　要：采用基于势的流体单元模拟水电站厂房流道内水体,通过流固耦合界面反应水电站厂房结构与流道内水体的相互作用,对结构的自振和抗震特性进行数值求解,并与不考虑水体时的计算结果对比。研究成果表明,流道内水体不同程度地改变了厂房结构的固有振动特性,且对高阶频率影响较大;考虑水体时结构各典型部位的振动位移、振动应力均大于不考虑水体的计算结果;水体对厂房上部结构振动位移的影响较大、对下部大体积混凝土结构振动位移的影响较小;对下部结构振动应力的影响较大、而对上部结构的影响相对较小。A potential-based fluid element was used to simulate the fluid in the flow passage of a hydropower house,and its natural vibration characteristics and seismic responses were calculated by a FEM model.These calculations were compared with those obtained by a no-fluid model,and the effect of fluid in the flow passage on the structure dynamic characteristics was analyzed.The results show that fluid in the flow passage causes a change in the natural vibration characteristics of hydropower house,generally leading to greater vibration displacement and greater vibration stress of structure than the no-fluid case.Such change influences the vibration displacement and stress in the upper structure of the house more than those in the lower structure.

关 键 词：水工结构 地震动响应 流固耦合分析 水电站厂房 势流体 自振特性 

分 类 号：TV312[水利工程—水工结构工程]