摘要
以广东长岗坡渡槽为研究对象,考虑运行期水体与槽体间的耦合作用,运用ANSYS有限元软件建立渡槽流固耦合模型,采用Unsymmetric法提取有水和无水两种工况的模态结果,获得前5阶频率和主振型。结果表明:渡槽结构的基频为1.034 Hz;渡槽结构的主振型以横向振型和整体振型为主;运行水位工况的各阶频率均小于无水工况,水体的存在削减了结构自振,因此在结构抗震设计和安全评价时应考虑流固耦合作用。
Taking Changgangpo aqueduct in Guangdong Province as the research object,considering the coupling effect between water and aqueduct in operation period,the fluid-structure coupling model of aqueduct is established by using ANSYS finite element software.The modal results of water and anhydrous conditions are extracted by Unsymmetric method,and the first five frequencies and main modes are obtained.The results show that the basic frequency of the aqueduct structure is 1.034 Hz;the main mode of vibration of the aqueduct structure is mainly transverse mode and integral mode of vibration;the frequencies of each order under the operating water level condition are less than those without water,and the existence of water reduces the structural self-vibration,so the fluid-structure interaction should be considered in the seismic design and safety evaluation of the structure.
作者
张建伟
张天恒
黄锦林
李兆恒
ZHANG Jianwei;ZHANG Tianheng;HUANG Jinlin;LI Zhaoheng(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China)
出处
《广东水利水电》
2019年第12期18-21,共4页
Guangdong Water Resources and Hydropower
基金
河南省高校科技创新人才计划(编号:18HASTIT012)
广东省水利科技创新基金(编号:2017-16)
关键词
流固耦合
结构建模
模态分析
矩形渡槽
fluid-structure interaction
structural modeling
modal analysis
rectangular aqueduct
