拟负刚度与粘滞阻尼混合减振结构的动力特性与减振效果分析
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摘要
对拟负刚度与粘滞阻尼混合减振结构的动力特性与减振效果进行了研究。首先,通过加速度放大系数和位移放大系数对拟负刚度与粘滞阻尼混合减振结构的动力特性进行分析。其次,通过反应谱对地震作用下拟负刚度与粘滞阻尼混合减振结构的减振效果进行分析,并与粘滞阻尼减振结构的减振效果进行比较。研究结果表明:拟负刚度控制能够延长结构的等效周期;当结构周期较长时,拟负刚度与粘滞阻尼混合减振结构对绝对加速度和相对位移的减振效果好于粘滞阻尼减振结构。
Dynamic characteristics and control performance of structures with pseudo-negative stiffness and viscous dampers were studied.Dynamic characteristics were analyzed by use of transmissibility and dynamic magnification factor of structures and control performance of structures subject to earthquake excitation was studied by use of response spectrum,and then compared with that of conventional structures with viscous dampers.The results show that pseudo-negative stiffness control system can prolong the equivalent period of structure and its control effects on absolute acceleration and displacement of structures are better than those of conventional structures with viscous dampers,when the structural period is somewhat longer.
Dynamic characteristics and control performance of structures with pseudo-negative stiffness and viscous dampers were studied.Dynamic characteristics were analyzed by use of transmissibility and dynamic magnification factor of structures and control performance of structures subject to earthquake excitation was studied by use of response spectrum,and then compared with that of conventional structures with viscous dampers.The results show that pseudo-negative stiffness control system can prolong the equivalent period of structure and its control effects on absolute acceleration and displacement of structures are better than those of conventional structures with viscous dampers,when the structural period is somewhat longer.
引文
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[13]史鹏飞,吴斌.拟负刚度阻尼减振结构的动力特性与减振效果分析[J].防灾减灾工程学报,2009,29(3):300-305.
[14]李妍,吴斌,欧进萍.弹塑性结构等效线性化方法的对比研究[J].工程抗震与加固改造,2005,27(1):1-6.
[2]李惠,刘敏,欧进萍,等.斜拉索磁流变智能阻尼控制系统分析与设计[J].中国公路学报,2005,18(4):37-41.
[3]Iemura H,Pradono M H.Simple algorithm for semi-activeseismic response control of cable-stayed bridges[J].Earth-quake Engineering and Structural Dynamics,2005,34:409-423.
[4]Li H,Liu M,Ou J P.Negative stiffness characteristics of ac-tive and semi-active control systems for stay cables[J].Structural Control and Health Monitoring,2008,15:120-142.
[5]Iemura H,Igarashi A,Toyooka A,et al.Innovative dampingtechnologies for seismic response control of urban flexiblestructures-Theory and development of negative stiffness damp-ers[C].The International on Advances in Urban Safety,Oct.15-16,2007,1-8.
[6]Iemura H,Pradono MH.Application of pseudo-negative stiff-ness control to the benchmark cable-stayed bridge[J].Jour-nal of Structural Control,2003,10:187-203.
[7]Xu Z D,Shen Y P,Guo Y Q.Semi-active control of struc-tures incorporated with magnetorheological dampers usingneural networks[J].Smart Materials and Structures,2003,12:80-87.
[8]谭平,Shirley J D.飞机航电设备的半主动磁流变控制[J].地震工程与工程振动,2007,27(6):203-210.
[9]Xu L H,Li Z X.Semi-active multi-step predictive control ofstructures using MR dampers[J].Earthquake Engineeringand Structural Dynamics,2008,37:1435-1448.
[10]Xu Z D,Guo Y Q.Neuro-fuzzy control strategy for earthquakeexcited nonlinear magnetorheological structures[J].Soil Dy-namics and Earthquake Engineering,2008,28:717-727.
[11]Li HN,Chang Z G.Semi-active control for eccentric struc-tures with MR damper based on hybrid intelligent algorithm[J].The Structural Design of Tall and Special Buildings,2008,17:167-180.
[12]涂建维,张凯静,瞿伟廉.升船结构地震鞭梢效应的MR智能隔震控制[J].华中科技大学学报(自然科学版),2008,36(6):103-105.
[13]史鹏飞,吴斌.拟负刚度阻尼减振结构的动力特性与减振效果分析[J].防灾减灾工程学报,2009,29(3):300-305.
[14]李妍,吴斌,欧进萍.弹塑性结构等效线性化方法的对比研究[J].工程抗震与加固改造,2005,27(1):1-6.
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