摘要
目前已证实调谐质量阻尼器(TM D)可以有效控制桥梁抖振响应,并已在工程中得到应用。然而,传统桥梁抖振被动控制理论是基于单模态叠加SRSS法,无法考虑多模态参与作用和模态间气动耦合效应,本文基于Scan lan多模态耦合抖振理论和多重调谐质量阻尼器(M TM D)被动控制理论,提出一种桥梁多模态耦合抖振M TM D控制方法,该方法可以考虑多模态参与作用、模态间气动耦合效应和单模态中各模态位移分量的气动耦合,且对各TM D在主梁上的安装位置没有任何限制。本文最后采用时域仿真方法对该方法进行了验证,两者计算结果吻合良好,表明本文所提出的方法的正确性。
Tuned mass damper（TMD） is proven to be effective against wind-induced buffeting response and has been installed on some existed bridges. However, the traditional buffeting control method using TMD or MTMD has predominantly been accomplished by single-mode-based method or SRSS method in which the aerodynamic coupling effects among the modes are neglected. Based on multi-mode coupled buffeting theory proposed by Scanlan and passive control theory of multiple tuned mass dampers （MTMD）, a method for muhiTmode coupled buffeting control using multiple tuned mass dampers for bridges is established in this paper. Multi-mode participation and aerodynamic coupling between modes or modal displacement components in a mode are all taken into account in the formulation and each TMD can be installed anywhere on the bridge deck. Finally, time-domain approach is used to verify the proposed method and the results agree well with those of time-domain approach, which shows that the method is correct.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2006年第1期107-112,共6页
Chinese Journal of Computational Mechanics
关键词
大跨度桥梁MTMD
抖振控制
多模态耦合抖振
long-span bridges
multiple tuned mass dampers
buffeting control
multi-mode coupled buffeting
