核电厂隔震结构附加侧向阻尼系统分析模型及减震效果  

Analysis model and damping performance of isolated structures with lateral fluid viscous damper for NPPs

作　　者：冯祎鑫 刘文光[1] 潘蓉 李韶平 FENG Yi-xin;LIU Wen-guang;PAN Rong;LI Shao-ping(Department of Civil Engineering,School of Mechanics and Science,Shanghai University,Shanghai 200444,China;Nuclear and Radiation Safety Center,Beijing 100082,China;Shanghai Nuclear Engineering Research&Design Institute Co.,Ltd.,Shanghai 200233,China)

机构地区：[1]上海大学力学与工程科学学院土木工程系,上海200444 [2]生态环境部核与辐射安全中心,北京100082 [3]上海核工程研究设计院有限公司,上海200233

出　　处：《振动工程学报》2023年第5期1371-1379,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51778355,51778356)。

摘　　要：提出对半埋置/全埋置小堆三维隔震结构附加侧向黏滞阻尼的混合控制系统,达到同时控制水平加速度、水平位移以及摇摆反应且不影响竖向隔震效果的目的。基于隔震层及侧向阻尼系统变形分析,建立考虑隔震层平动及摇摆的耦合效应和侧向阻尼器协调转动变形的刚体动力学模型。基于RG1.60谱选取30条地震输入信号开展参数分析,探究阻尼布置参数、附加阻尼力参数及阻尼滞回形状参数对减震效应的影响。研究发现合理的附加阻尼力与隔震层出力比值区间为10%~20%,最优参数下水平加速度位移可同时分别减小20%,40%,最大摇摆反应减小70%。选取合理阻尼参数对某真实核电厂模型进行案例分析,摇摆角、加速度、隔震层位移等地震响应指标均减小,边支座受拉现象消失,案例数值模拟结果与参数分析规律一致,也与理论分析吻合。In this paper,an isolated structure system with lateral fluid viscous damper is proposed to control horizontal accelera-tion,horizontal displacement and swaying response without affecting vertical isolation effect.Based on the deformation analysis of isolation layer and lateral damping system,a rigid body dynamic theoretical model is established considering the coupling effect of the translational and swaying of isolation layer and the coordinated rotation deformation of lateral fluid viscous damper.Based on RG1.60 spectrum,30 input seismic signals are selected to carry out parameter analysis.The arrangement of damper(parameter fd),ratio of damping force to reaction force of isolation layer(parameter fc)and the damping exponent(parameter fα)are chosen as three main parameters,whose sensitivity is discussed through non-linear dynamic time-history method.It is found that the optimal ratio of damping force to reaction force of isolation layer is 10-20%.Under the optimal parameters,the horizontal acceleration dis-placement can be reduced by 20%and 40%respectively,and the maximum rocking response can be reduced by 70%.Optimal damping parameters are selected to complete the case study.The seismic response including rocking response,acceleration and dis-placement of isolation layer are reduced.The numerical simulation results of the case study are consistent with the parameter analy-sis and are consistent with theoretical analysis.

关 键 词：复合隔震结构 核电厂 耦合模型 参数分析 减震性能 

分 类 号：TU352.12[建筑科学—结构工程]