基于磁流变阻尼器的新结构体系风载激励下的半主动控制研究  

Understanding Better Semi-Active Control Employing Magnetorheological Dampers for Suppressing Wind Excitation of New MSCS Structural System

作　　者：秦相军[1] 张洵安[1] 谢霄[1] 林治民[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,陕西西安710072

出　　处：《西北工业大学学报》2007年第6期864-868,共5页Journal of Northwestern Polytechnical University

基　　金：西北工业大学科技创新基金(M450211)资助

摘　　要：探讨了采用磁流变阻尼器后新型M SCS结构在随机风载激励下的半主动控制,推导并建立了其控制方程,讨论了在半主动控制下主子结构相对刚度比和附加阻尼比参数的变化对结构响应控制效果的影响,并与相应的传统结构风振响应进行了对比分析。结果表明该新型结构采用半主动控制能够获得令人满意的控制效果,其半主动控制能有效地减小结构的位移和加速度响应。In this paper, semi-active control, using magnetorheological dampers, of the new MSUS （megasub controlled structure） structural system under random wind loads is investigated. Dynamic equation and method for assembling parameter matrixes for the MSCS under random wind loads are presented. We perform the parametric study of the relative stiffness ratio and the additional damping ratio that influence the response control effectiveness of the MSCS. With a numerical example, we explain in some detail what we believe to be a better understanding of semi-active control employing magnetorheological dampers for suppressing wind excitation of the MSCS. With the help of Fig. 2 in the full paper, we explain placing two magnetorheological dampers in the MSCS between the sub-structure and mega-structure. The responses respectively of the MSCS with control and the corresponding conventional structure without control are analyzed and compared. The results, summarized in Figs. 4 through 7 and Table 1 indicate preliminarily that the semi-active control employing magnetorheological dampers does significantly reduce the vibration displacement and acceleration response of the MSCS.

关 键 词：MSCS结构 磁流变阻尼器 半主动控制 相对刚度比 附加阻尼比 

分 类 号：TU311.3[建筑科学—结构工程]