调谐液柱阻尼器-结构系统风致振动响应的CFD/CSD耦合分析方法  

CFD/CSD coupled analysis method for wind-induced vibrationresponses of TLCD-structure system

作　　者：黄鹏[1] 吴玖荣[1] 傅继阳[1] 孙连杨 王加雷 HUANG Peng;WU Jiurong;FU Jiyang;SUN Lianyang;WANG Jialei(Wind Engineering and Engineering Vibration Research Center,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学风工程与工程振动研究中心,广州510006

出　　处：《振动与冲击》2024年第11期236-245,254,共11页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51925802;52378479;1972123);高等学校学科创新引智计划(111计划:D21021)。

摘　　要：针对调谐液柱阻尼器(tuned liquid column damper, TLCD)难以建立其精确的非线性理论分析模型,且其力学性能试验成本高和耗时长等问题,首先采用计算流体动力学(CFD)数值模拟方法,对TLCD系统的力学性能和动力特征进行仿真模拟,在此基础上进一步提出了基于计算流体动力学/计算结构动力学(CFD/CSD)耦合分析方法,求解带TLCD系统的高层建筑结构的风致动力响应。通过开展某一TLCD系统在特定底部激励下的力学性能和动力特性试验,得到其内液体晃荡的自由液面波高和晃动力时程,验证了CFD数值模拟方法可以准确地分析TLCD水箱内液体的非线性晃动特征。随后对风工程领域广泛采用的76层建筑结构振动控制Benchmark模型,假设其顶部设置TLCD系统时主体结构在三种风速重现期(10、50和100年)风速对应的横风向动力风荷载激励下的风致控制效率,采用提出的CFD/CSD耦合分析方法,进行了数值仿真模拟分析。耦合分析结果表明,TLCD系统对Benchmark模型的风致加速度、速度和位移响应均有一定的控制效果,对加速度响应的控制效果要优于对位移响应的控制效果。该研究方法可为复杂TLCD系统对高层建筑的风振控制分析提供有效的参考。Here,aiming at problems of difficulty to establish an accurate nonlinear theoretical analysis model for tuned liquid column damper(TLCD),and high cost and time-consuming for its mechanical performance tests,firstly,computational fluid dynamics(CFD)numerical simulation method was used to simulate mechanical performance and dynamic characteristics of a TLCD system.Then,a coupled analysis method based on computational fluid dynamics/computational structural dynamics(CFD/CSD)was further proposed to solve wind-induced dynamic responses of high-rise building structures with TLCD systems.Tests for mechanical properties and dynamic characteristics of a certain TLCD system under specific bottom excitations were conducted to obtain free liquid surface wave heights and sloshing force time histories of liquid sloshing inside the TLCD system.It was shown that the proposed CFD/CSD coupled simulation method can correctly analyze nonlinear sloshing characteristics of liquid inside the TLCD system.Subsequently,the benchmark model for vibration control of 76-story building structure widely used in wind engineering field was adopted.It was assumed that a TLCD system is installed at the model top.The wind-induced vibration control efficiency of the model main structure under 3 wind speed return periods of 10,50 and 100 years corresponding to crosswind dynamic wind load was analyzed with numerical simulation using the proposed CFD/CSD coupled analysis method.The coupled analysis results showed that TLCD system has a certain control effect on wind-induced acceleration,velocity and displacement responses of the Benchmark model;the control effect on acceleration response is better than that on displacement response;the proposed study method can provide an effective reference for analyzing wind induced vibration control of high-rise buildings with complex TLCD systems.

关 键 词：调谐液柱阻尼器(TLCD) 高层结构 风振控制 计算流体动力学(CFD) 计算结构动力学(CSD) CFD/CSD耦合分析方法 

分 类 号：TU973[建筑科学—结构工程]