斜拉索杠杆质量减振器的减振分析  

ANALYSIS ON INCLINED CABLE VIBRATION SUPPRESSION USING LEVER MASS DAMPER

作　　者：汪正兴[1] 任文敏[1] 陈开利 

机构地区：[1]清华大学航天航空学院,北京100084 [2]中铁大桥局桥梁科学研究院有限公司,武汉430033

出　　处：《工程力学》2007年第11期153-157,共5页Engineering Mechanics

摘　　要：提出一种新型的斜拉索减振器——杠杆质量减振器,对其构造、减振原理等进行了分析。采用非线性有限元法,通过计算LMD-斜拉索系统的复特征值来求解系统的阻尼特性。与油阻尼器相比,除首阶模态,系统的各阶模态阻尼比都有提高,表明其具有更好的减振效果。A new damper system called Lever Mass Damper （LMD） for vibration control of inclined cables on cable-stayed bridges is developed, and the structure, damping principle of LMD for vibration suppression are discussed as well. The damping performance of an LMD attached to a stay cable is investigated by solving complex eigenvalue problem with Nonlinear FEM. Compared with an oil damper for cable vibration control, except the 1st mode, LMD can provide higher modal damping ratios and has better performance for mitigation of cable vibration.

关 键 词：振动控制 斜拉索 杠杆质量阻尼器 非线性有限元 悬链线单元 

分 类 号：O327[理学—一般力学与力学基础] O328[理学—力学]