摘要
针对大跨双向悬索结构的振动控制问题,基于多重调谐质量阻尼器(MTMD)减振控制原理,以结构模态阻尼比为参考指标,提出MTMD减振设计方法.进而以某大跨双向悬索结构为背景,提出MTMD减振设计方案,针对两阶主要竖向振动模态分别设计两套MTMD子系统,通过调整MTMD频率带宽与TMD阻尼比,在显著提升结构模态阻尼比的同时使减振系统具备一定控制带宽,保证减振系统鲁棒性.分析表明,本文提出的减振设计方案能够有效提升结构模态阻尼比,MTMD质量比为0.02条件下,模态阻尼比增幅高达556%.
On the basis of the vibration control mechanisms of Multiple Tuned Mass Dampers(MTMD),this paper proposed a detailed MTMD design method to enhance the modal damping of a bidirectional large-span cable supported roof structure,based on which a MTMD scheme is developed.Two MTMD sub-systems are formulated to mitigate responses of the first two vertical modes of the structure,respectively.The frequency bandwidth and the damping ratio of each MTMD sub-system are carefully determined to ensure the enhancement of the modal damping ratio of the structure as well as the robustness of the MTMD system.The performance of the MTMD scheme is verified through numerical analysis.It is shown that the modal damping ratio of the structure increases up to 556%with the MTMD mass ratio of 0.02.
作者
张相勇
滕起
苗峰
王昕聪
董晟昊
段元锋
ZHANG Xiang-yong;TENG Qi;MIAO Feng;WANG Xin-cong;DONG Sheng-hao;DUAN Yuan-feng(China Construction Science and Industry Co.,LTD,Shenzhen 518040,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)
出处
《空间结构》
CSCD
北大核心
2021年第3期32-40,共9页
Spatial Structures
基金
国家重点研发计划项目(2018YFE0125400)
国家自然科学基金项目(U1709216)。
关键词
多重调谐质量阻尼器(MTMD)
大跨屋盖
悬索结构
模态阻尼比
Multiple Tuned Mass Dampers(MTMD)
large-span roof structure
cable supported structure
modal damping ratio
