地震激励下非线性结构的隔震换能控制
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摘要
隔震换能控制装置具有隔震换能和主动控制的双重作用,将该装置安装在建筑结构的隔震层处就构成了隔震换能控制系统。隔震层一般采用橡胶垫等强非线性材料,应用通常的线性分析方法,难以反映该系统的动力特性。本文应用MATLAB提供的s-function建立了描述非线性结构的状态空间模型,提出了建筑结构隔震换能控制系统的分析方法和控制策略。通过仿真分析,探讨了隔震层刚度及其非线性特性对隔震换能控制系统振动控制效果的影响。
An isolation transducer control device has two main functions:one is isolation and energy transform,and the other is active control.A new structural control system is constructed by installing the isolation transducer control device onto the isolation layer of a structure.The property of the control system plays largely on the characteristics of the isolation layer,in which the stiffness and hysteresis are the most concerned factors.The isolation is usually made from highly nonlinear material,such as rubber.It is inadequate to analyze such a control system by using a linear analysis method.A new state space model is presented in the paper by using the sfunction of MATLAB,represent the nonlinear material property.A mathematical model of the control system is established and a new control strategy is proposed.The influence of the stiffness and hysteresis of the isolation layer are discussed.A simulation example is given to show these influences on the control effects.
An isolation transducer control device has two main functions:one is isolation and energy transform,and the other is active control.A new structural control system is constructed by installing the isolation transducer control device onto the isolation layer of a structure.The property of the control system plays largely on the characteristics of the isolation layer,in which the stiffness and hysteresis are the most concerned factors.The isolation is usually made from highly nonlinear material,such as rubber.It is inadequate to analyze such a control system by using a linear analysis method.A new state space model is presented in the paper by using the sfunction of MATLAB,represent the nonlinear material property.A mathematical model of the control system is established and a new control strategy is proposed.The influence of the stiffness and hysteresis of the isolation layer are discussed.A simulation example is given to show these influences on the control effects.
引文
[1]周锡元,阎维明,杨润林.建筑结构的隔震、减震和振动控制[J].建筑结构学报,2002,23(2):2-12
[2]中国工程建设标准化协会,叠层橡胶支座隔震技术规程[M].北京,2001
[3]孙作玉,刘季.结构振动控制的无能源主动控制[J].地震工程与工程震动,1999,19(3):102-105
[4]孙作玉,程树良,王焕定.隔震换能系统的换能效率及振动控制效果的研究[ J].工程力学,2005,22(2):132-136
[5]孙作玉,王晖.隔震换能控制装置的工作原理及其应用[J].振动工程学报,2004,17(4):494-499
[2]中国工程建设标准化协会,叠层橡胶支座隔震技术规程[M].北京,2001
[3]孙作玉,刘季.结构振动控制的无能源主动控制[J].地震工程与工程震动,1999,19(3):102-105
[4]孙作玉,程树良,王焕定.隔震换能系统的换能效率及振动控制效果的研究[ J].工程力学,2005,22(2):132-136
[5]孙作玉,王晖.隔震换能控制装置的工作原理及其应用[J].振动工程学报,2004,17(4):494-499
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