轴向运动嵌套悬臂梁的MTMD设计与减振鲁棒性分析  

MTMD Design and Vibration Reduction Robustness Analysis of Axially Moving Nested Cantilever Beam

作　　者：王建平 于洋 王峥嵘 程建生 余文明 高锋 Wang Jianping;Yu Yang;Wang Zhengrong;Cheng Jiansheng;Yu Wenming;Gao Feng(College of Field Engineering,Army Engineering University of PLA,Nanjing 210007;China Harzone Industry Co.,LTD.,Wuhan 430223,China;The 73211th Troop of PLA,Nanjing 210000,China)

机构地区：[1]陆军工程大学野战工程学院,江苏南京210007 [2]中国船舶重工集团应急预警与救援装备股份有限公司,湖北武汉430223 [3]中国人民解放军73211部队,江苏南京210000

出　　处：《华东交通大学学报》2021年第6期46-53,共8页Journal of East China Jiaotong University

基　　金：国家重点研发计划项目(2016YFC082702)。

摘　　要：针对装配式钢桁架桥架设过程中运用调谐质量阻尼器(TMD)进行减振控制会遇到结构布置受限的问题,研究在时变系统中采用多重调谐质量阻尼器(MTMD)来进行减振控制。运用ANSYS软件建立轴向运动嵌套悬臂梁的有限元模型,利用动力学理论建立了轴向运动嵌套悬臂梁附加MTMD的动力学方程,数值求解后与有限元法进行对比表明吻合较好,并得到了结构振动的受控模态;按照受控模态设计了MTMD系统的参数,研究不同数量的TMD对桥梁减振效果,得到3个TMD的减振效果明显的结论。研究导梁不同推送速度在MTMD下减振效果的鲁棒性,提出适当放大MTMD的频率间距,可降低推送速度波动带来减振效果不良影响的结论。In the process of erecting fabricated steel truss bridge, the tuned mass dampers(TMD) vibration control will encounter the problem of structural layout limitation. In this study, multiple tuned mass dampers(MTMD) was used to reduce the vibration of the time-varying system. The finite element model of the axially moving nested cantilever beam was established by ANSYS software. The dynamic equations of an axially moving nested cantilever with an additional MTMD were established by using the dynamic theory. The numerical results agreed well with the FEM results, and the controlled modes of the structure were obtained. The parameters of the MTMD system were designed according to the controlled mode. The controlled reduction effect of different number of TMD was explored. Through the analysis of the robustness of MTMD with different pushing velocity of the guide beam, it finds that the vibration reduction effect of three TMD is obvious and enlarging the frequency interval of MTMD properly can reduce the bad influence of the pushing velocity on the vibration reduction effect.

关 键 词：装配式钢桁架桥 轴向运动嵌套悬臂梁 多重调谐质量阻尼器 减振鲁棒性分析 

分 类 号：U448[建筑科学—桥梁与隧道工程]