地震作用下主-从结构的被动优化控制研究
|
摘要
提出了一种利用主 -从结构间的相互作用来减少在地震作用下结构响应的控制方法。该方法通过优化设计主 -从结构间的被动耗能单元 ,最大限度地耗散结构的相对振动能量以减小主、从结构的整体振动水平 ,或最大限度地吸收主结构的相对振动能量以减小主结构的振动。文章首先导出了在平稳白噪声激励下被动耗能单元优化刚度和优化阻尼的一般表达式 ,并分析了不同结构参数对控制效果的影响 ;比较了在不同的平稳过滤白噪声激励下主 -从结构相对位移反应的均方根值 ;最后给出了在EI- Centro1 940 NS地震波作用下主 -从结构相对位移和绝对加速度反应的峰值。数值结果表明了这种被动优化控制方法的有效性
A new structural control approach, which uses interaction between a primary and a auxiliary structures to reduce the vibration of this system due to earthquake is proposed. The control strategy is to remove relative vibrational energy associated with vibration from primary structure or minimize the total relative vibrational energy of the combined system. Firstly, optimal parameters of the passive coupling element such as damping and stiffness under different circumstances are determined and the influence of structural parameters on the control effectiveness is considered. Then, numerical results including the root mean square values of the response subjected to the filtered white noise excitation and the peak values of response to EI Centro 1940 NS excitation are presented. Finally, some valuable conclusions are drawn.
A new structural control approach, which uses interaction between a primary and a auxiliary structures to reduce the vibration of this system due to earthquake is proposed. The control strategy is to remove relative vibrational energy associated with vibration from primary structure or minimize the total relative vibrational energy of the combined system. Firstly, optimal parameters of the passive coupling element such as damping and stiffness under different circumstances are determined and the influence of structural parameters on the control effectiveness is considered. Then, numerical results including the root mean square values of the response subjected to the filtered white noise excitation and the peak values of response to EI Centro 1940 NS excitation are presented. Finally, some valuable conclusions are drawn.
引文
1 刘季 .中国结构控制研究状况 ,哈尔滨建筑工程学院学报 ,1 993年 ,第 2 6卷 4期 ,1～ 1 1
2 M.Q.Feng and Akira Mita,Vibration control of tall building using mega subconfiguration,J.of Engrg.Mech.,ASCE,1 995,1 2 1 ( 1 0 ) ,1 0 82～ 1 0 88
3 L.Cremer and M.Heckl,Structure Borne Sound,New York:Springer Verlag,1 973
4 K.Kanal,Seismic-empirical formula for the seismic characteristics of the ground.Bull.Earthquake Research Institute ofJapan,1 957,3 5:3 0 9～ 3 2 5
2 M.Q.Feng and Akira Mita,Vibration control of tall building using mega subconfiguration,J.of Engrg.Mech.,ASCE,1 995,1 2 1 ( 1 0 ) ,1 0 82～ 1 0 88
3 L.Cremer and M.Heckl,Structure Borne Sound,New York:Springer Verlag,1 973
4 K.Kanal,Seismic-empirical formula for the seismic characteristics of the ground.Bull.Earthquake Research Institute ofJapan,1 957,3 5:3 0 9～ 3 2 5
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心