一种惯质黏滞阻尼器的性能及其对拉索减振效果的试验研究  

An experimental investigation of an inertial viscous damper and its damping effect on a cable

作　　者：刘菁 梁栋 LIU Jing;LIANG Dong(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北省土木工程技术研究中心,天津300401

出　　处：《振动与冲击》2022年第8期93-101,123,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51978236)。

摘　　要：该研究制作了一台利用齿轮、齿条、惯质元件和黏滞阻尼元件组合的拉索阻尼器样机,并开展了详细的拉索减振试验研究。建立了考虑拉索垂度、内阻尼特性、阻尼器齿轮惯质、转动轴惯质与轴承的阻尼特性等因素影响的拉索-阻尼器振动体系,并利用改进的Galerkin方法进行数值分析。详细讨论了该新型阻尼器的自身性能参数、耗能性能及其针对拉索的减振性能。试验结果与数值计算对比分析表明:惯质黏滞阻尼器具有明显的负刚度,由此产生的位移放大效应对拉索减振效果有显著的正面影响。改进的Galerkin方法能够用于惯质黏滞阻尼器-拉索减振系统的分析中,且该算法不依赖于计算初值的选择;数据计算结果与试验结果吻合较好,验证了该研究计算方法的准确性;该惯质黏滞阻尼器对拉索振动具有良好的减振效果。A prototype of an inertial viscous damper for cables,composed of rack and pinion,inertial element,and viscous damping element,was fabricated.Detailed experimental investigation of stay cables’vibration control was carried out.A cable-damper system considering sag,internal damping characteristics,pinion’s inertia,shaft’s inertia,and bearing’s damping characteristics was established.Numerical analysis was carried out using an improved Galerkin method.The novel damper’s performance parameters,energy dissipation capacity,and vibration control effect on cables were discussed.The comparison between experimental and numerical investigation shows that the inertial viscous damper produces apparent negative stiffness in the vibration damping of the cable,and the displacement amplification effect has a significant positive impact on the vibration damping effect.The improved Galerkin method can be adopted in the analysis of a cable-inertial viscous damper system,and the algorithm does not depend on the selection of initial values.The theoretical results are in good agreement with the experimental results,verifying the accuracy of the proposed method in this study.The inertial viscous damper has a good damping effect on cable vibration.

关 键 词：惯质黏滞阻尼器 改进Galerkin方法 数值计算 拉索试验 减振性能 

分 类 号：U448[建筑科学—桥梁与隧道工程]