摘要
受安装位置限制,常用的粘滞阻尼器并不能很好地抑制超长拉索的振动。本文推导了单TMD-拉索系统模态阻尼比的近似解,确定了抑制拉索某阶振动的TMD参数。参考单个TMD的设计参数,建立了抑制拉索多阶振动的MTMD-拉索系统。通过有限元分析了拉索的自由振动和强迫振动衰减情况,验证了MTMD抑制拉索多阶振动的有效性。
Restricted by installation location,commonly used viscous dampers would not play a very good suppression of the long cable vibration. The approximate solution of modal damping ratio of single TMD-cable system is deduced,the parameters in the inhibition of the multi-order vibration of TMD are confirmed. Referring to the design of a single TMD parameter,the MTMD-cable system for suppressing multi-stage vibration of cable is established. Through the finite element,the free vibration and forced vibration attenuation of cable are analyzed,which proves that MTMD can suppress the multi-order vibration of cable.
作者
梁栋
夏宏达
刘菁
李岩峰
Liang Dong;Xia Hong-da;Liu Jing;Li Yan-feng(School of Civil Engineering and Transportation ,Hebei University of Technology, Tianjin 300401, China;Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China)
出处
《工程抗震与加固改造》
北大核心
2018年第3期99-105,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(50808063)
