单摆式电涡流TMD装置优化设计与模型试验研究  

Optimization design and model tests for a pendulum eddy-current tuned mass damper

作　　者：汪志昊 郜辉 张新中 田文文 WANG Zhihao;GAO Hui;ZHANG Xinzhong;TIAN Wenwen(School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,Chin)

机构地区：[1]华北水利水电大学土木与交通学院,郑州450045

出　　处：《振动与冲击》2018年第9期1-7,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51308214);河南省高等学校青年骨干教师资助计划(2015GGJS-104);河南省高校科技创新团队支持计划(15IRTSTHN028);郑州市城市综合防灾重点实验室项目(201618)

摘　　要：为实现单摆式电涡流TMD构造与磁路优化设计,探讨了TMD装置整体构造,综合理论分析、模型试验与三维电磁场有限元仿真,研究了TMD质量块与板式电涡流阻尼器(PECD)二者之间的磁场吸引力作用对TMD振动频率的影响程度,以及磁路布置对PECD等效阻尼系数的影响规律。结果表明:PECD宜安装在TMD运动质量块的底面;磁场吸引力作用将增大TMD振动频率,TMD初步设计宜适当调整初始摆长以避免TMD失谐;通过尽可能减小磁场间隙、适当加厚导磁钢板、优化铜板厚度等方法均可提升PECD耗能效果;沿TMD运动方向,相邻永磁体磁极宜交错布置,通过有限元仿真确定最优间距;沿垂直于TMD运动方向,相邻永磁体磁极宜同向布置,且间距越小越好。To realize optimal design for structure and magnetic circuit of a pendulum tuned mass damper（ PTMD）with eddy current damping,the overall structure of PTMD with a planar eddy-current damper（ PECD） was studied qualitatively. The effects of magnetic field attractive force between PTMD and PECD on vibration frequency of PTMD,and those of magnetic circuit layout on equivalent damping coefficient of PECD were investigated using theoretical analysis,model tests and 3 D electromagnetic field finite element simulation. The results showed that PECD should be installed at the bottom of the moving mass of PTMD,the magnetic field attractive force makes the vibration frequency of PTMD increase; the pendulum initial length of PTMD should be appropriately adjusted to avoid TMD detuning; the energydissipating effect of PECD is improved by reducing magnetic field gap,increasing steel plate thickness properly and optimizing copper plate thickness; along the moving direction of PTMD,adjacent permanent magnets’ magnetic poles need to be arranged in a staggered manner,their optimal interval is determined with FEM; while along the direction perpendicular to the moving direction of PTMD,adjacent permanent magnets’ magnetic poles need to be arranged in the same polarity manner,they are close enough.

关 键 词：摆式调谐质量阻尼器(PTMD) 板式电涡流阻尼器(PECD) 等效阻尼系数 磁路优化 振动频率 阻尼比 

分 类 号：TU352.1[建筑科学—结构工程]