拟负刚度阻尼减振结构的动力特性与减振效果分析
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摘要
对拟负刚度阻尼减振结构的动力特性与减振效果进行了研究。首先,证明了采用拟负刚度控制方法时,结构响应与外荷载之间满足齐次性;其次,对拟负刚度阻尼减振结构的加速度放大系数和位移放大系数进行了研究,并与粘滞阻尼减振结构的加速度放大系数和位移放大系数进行了比较;最后,对地震荷载作用下拟负刚度阻尼减振结构的减振效果进行了分析。研究结果表明:当外荷载与结构的频率比大于1或结构的周期较长时,拟负刚度控制对结构绝对加速度的控制效果要好于粘滞阻尼减振结构的控制效果,对结构位移的控制效果要差于粘滞阻尼减振结构的控制效果。
Dynamic characteristics and control performance of structures with pseudo-negative stiffness dampers are studied.First,the homogeneity between structural response and external loading is proved when the pseudo-negative stiffness control is used.Second,acceleration and displacement magnification factors of a structure with pseudo-negative stiffness dampers are studied.The acceleration and displacement magnification factors are compared with those of a structure with viscous dampers.Third,the control effect of the structure with the pseudo-negative stiffness dampers subject to earthquake is studied.The results show that the control effect of the pseudo-negative stiffness control on absolute acceleration is better than that of the viscous damper control,but the control effect on displacement is worse than that of the viscous damper control when the frequency ratio between loading and a structure is greater than 1 or the period of the structure is relatively long.
Dynamic characteristics and control performance of structures with pseudo-negative stiffness dampers are studied.First,the homogeneity between structural response and external loading is proved when the pseudo-negative stiffness control is used.Second,acceleration and displacement magnification factors of a structure with pseudo-negative stiffness dampers are studied.The acceleration and displacement magnification factors are compared with those of a structure with viscous dampers.Third,the control effect of the structure with the pseudo-negative stiffness dampers subject to earthquake is studied.The results show that the control effect of the pseudo-negative stiffness control on absolute acceleration is better than that of the viscous damper control,but the control effect on displacement is worse than that of the viscous damper control when the frequency ratio between loading and a structure is greater than 1 or the period of the structure is relatively long.
引文
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[2]吕明云,瞿伟廉,涂建维.建筑结构地震反应的智能隔震控制[J].武汉理工大学学报,2002,24(4):62-65.L M Y,Qu W L,Tu J W.Intelligent isolationcontrol for seismic responses of structure[J].Journalof Wuhan University of Technology,2002,24(4):62-65.
[3]李秀领,李宏男.磁流变阻尼建筑结构多态控制策略研究[J].应用力学学报,2008,25(1):162-167.Li X L,Li H N.Multi-state control strategy formagnetorheological damper structures[J].ChineseJournal of Applied Mechanics,2008,25(1):162-167.
[4]徐赵东,沈亚鹏.磁流变阻尼结构的双态控制和三态控制弹塑性分析[J].西安交通大学学报,2003,37(7):754-758.Xu Z D,Shen Y P.Elastoplastic analysis formagnetorheological structure under bi-state controland tri-state control[J].Journal of xi’an JiaotongUniversity,2003,37(7):754-758.
[5]周福霖,谭平,冼巧玲,等.房屋隔震体系的研究与应用[J].建筑科学与工程学报,2006,23(2):1-8.Zhou F L,Tan P,Xian Q L,et al.Research andapplication of seismic isolation system for buildingstructures[J].Journal of Architecture and CivilEngineering,2006,23(2):1-8.
[6]付伟庆,张永山,刘文光,等.磁流变阻尼器被动隔震振动台试验研究[J].沈阳建筑大学学报(自然科学版),2006,22(2):196-198.Fu W Q,Zhang Y S,Liu W G,et al.Experimentalresearch on vibration table of passive isolation withmagnetorheological fluid damper[J].Journal ofShenyang Jianzhu University(Natural Science),2006,22(2):196-198.
[7]谭平,Dykes J.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.Tan P,Dyke S J.Semi-active vibration control ofaircraft avionics using MR dampers[J].Journal ofEarthquake Engineering and Engineering Vibration,2007,27(6):203-210.
[8]Iemura H,Igarashi A,Toyooka A,et al.Innovativedamping technologies for seismic response control ofurban flexible structures——theory and developmentof negative stiffness dampers[C]∥The InternationalSymposium on Advances in Urban Safety.Nanjing:[s.n.],2007.1-8.
[9]Iemura H,Pradono M H.Application of pseudo-negative stiffness control to the benchmark cable-stayed bridge[J].Journal of Structural Control,2003,(10):187-203.
[10]Li H,Liu M,Ou J P.Negative stiffnesscharacteristics of active and semi-active controlsystems for stay cables[J].Structural Control andHealth Monitoring,2008,(15):120-142.
[11]李妍.弹塑性结构抗震设计的简化方法[D].哈尔滨:哈尔滨工业大学,2003.Li Y.Simplified methods for aseismic design ofinelastic structures[D].Harbin:Harbin Institute ofTechnology,2003.
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