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.
出处
《水力发电学报》
EI
CSCD
北大核心
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)
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
hydraulic structure
seismic response
fluid-solid coupling
hydropower house
potential fluid
natural vibration characteristics
