调谐负刚度阻尼器的H2优化及减震性能评估  

H2 optimization and seismic performance evaluation of tuned negative stiffness damper

作　　者：郜辉 邢晨曦 王浩[1] 梁瑞军 GAO Hui;XING Chenxi;WANG Hao;LIANG Ruijun(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China;School of Law,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京211189 [2]东南大学法学院,江苏南京211189

出　　处：《哈尔滨工程大学学报》2023年第9期1571-1578,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51722804,51978155).

摘　　要：为进一步阐明调谐负刚度阻尼器(tuned negative stiffness damper,TNSD)对结构减震控制的优势,本文开展了TNSD对单自由度结构减震控制的H2优化设计,并研究了TNSD的减震增效作用与减震机理。首先,基于单自由度结构-TNSD耦合系统的H2性能指标,推导了TNSD最优负刚度系数和最优阻尼系数的设计公式;然后,研究了TNSD的刚度特性和阻尼特性、TNSD对结构的阻尼增效作用、TNSD-结构耦合系统的耗能特点,阐明了TNSD的减震增效机理;最后,开展了TNSD对结构减震控制的地震响应分析。结果表明:TNSD可进一步提升负刚度阻尼器对结构的减震效果,其调谐弹簧可以放大TNSD内部阻尼元件的位移和TNSD等效阻尼系数,提升了TNSD的耗能效率和结构的等效阻尼比。This paper presents the H2 optimization design of the tuned negative stiffness damper(TNSD)in a single degree of freedom(SDOF)structure seismic control and investigates the performance enhancement and mechanism of the TNSD for vibration reduction to further demonstrate the advantages of TNSD in structure seismic control.The design equations of the optimum negative stiffness and the optimum damping coefficients of the TNSD are derived on the basis of the H2 performance index of the SDOF structure-TNSD coupling system.The stiffness and damping characteristics of the TNSD,the structural damping enhancement,and the energy dissipation property of the structure-TNSD coupling system are investigated.The performance enhancement mechanism of the TNSD is explored on the basis of the aforementioned investigation.Finally,the seismic response analysis of TNSD for structural seismic control is performed.Results show that TNSD can further improve the seismic control performance of the negative stiffness damper for structures.The tuning spring can enlarge the displacement of the damping element and the equivalent damping coefficient of the TNSD.Thus,the energy dissipation efficiency of the TNSD and structural equivalent damping ratio can be improved.

关 键 词：负刚度 调谐负刚度阻尼器 H2优化 单自由度结构 减振机理 阻尼增效 耗能特征 减震性能提升 

分 类 号：TU352.12[建筑科学—结构工程] TU435