摘要
针对TMD各参数对拉索减振的影响,提出拉索-TMD系统的减振模型.运用复模态方法分析得到系统自由振动阻尼特性的数学解析式,求得拉索-TMD系统的最优模态阻尼比近似解表达式,即得到TMD对拉索减振的具体影响参数,并以此为基础借助有限元软件,建立拉索-TMD系统模型.以TMD各参数为控制变量,通过外界正弦激励,记录拉索的时程数据曲线.通过对所得数据的分析得出TMD各参数变化对拉索阻尼比的影响规律.结果表明:TMD对拉索减振起到明显的作用.通过拉索-TMD系统的有限元模拟可以确定TMD各参数对系统减振的具体影响,得到的优化参数可以对工程中TMD优化设计提供指导.
It has been proved that the parameters of tuned mass damper（TMD）affect the cable vibration.In the study,a stay cable with a tuned mass damper system installed is proposed for vibrate reduction.Damping properties in free vibration of the system are extracted by complex-mode analysis technique.Explicit analytical approximation is obtained in numerical method,and the specific parameters of TMD for vibrate reduction obtained.On this basis,a cable-TMD system model is established by the finite element software.The cable is excited by sine functions,and the response of cable-TMD system under different parameters of TMD is analyzed by time-histories data.The various parameters of TMD affecting the cable vibration are found through the analysis of the data.Result shows that the tuned mass damper will effectively reduce the vibration of the cable.The cable with TMD simulation in the finite element method shows the parameters of TMD affect the cable vibration,so the parameters＇ rations are optimized in this paper.
出处
《青岛理工大学学报》
CAS
2015年第6期40-46,74,共8页
Journal of Qingdao University of Technology
关键词
拉索
TMD
ANSYS
模态阻尼
参数化建模
cable
tuned mass damper（TMD）
ANSYS
modal damping
parametric modeling
作者简介
狄方殿（1989-），男．山东济宁人．硕士，主要从事桥梁方面的研究．E—mail：2292522726@qq．com
