新型电磁式涡流阻尼器力学性能研究  

Research on Mechanical Properties of a New Type of Electromagnetic Eddy Current Damper

作　　者：彭金强 刘彦辉 陈克坚[3] 戴胜勇[3] 张志勇[3] 张颖[1,2] PENG Jinqiang;LIU Yanhui;CHEN Kejian;DAI Shengyong;ZHANG Zhiyong;ZHANG Ying(Earthquake Engineering Research&Test Center of Guangzhou University,Guangzhou 510006,China;Key Laboratory of Earthquake Resistance and Absorption Engineering&Structure Safety of the Ministry of Education,Guangzhou University,Guangzhou 510006,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]广州大学工程抗震研究中心,广州510006 [2]广州大学工程抗震减震与结构安全教育部重点实验室,广州510006 [3]中铁二院工程集团有限责任公司,成都610031

出　　处：《华南地震》2024年第2期144-152,共9页South China Journal of Seismology

基　　金：政府间国际科技创新合作(2021YFE0112200);中国中铁股份公司科技研究开发计划项目(2015-重点-07)联合资助。

摘　　要：为了改善涡流阻尼器在实际工程中的应用性,利用了外部电源改变装置内部磁通量大小,提出了一种新型主动控制式电磁涡流阻尼器(Electromagnetic Eddy Current Damper,简称EECD)。首先考虑磁回路有效利用磁通量及转动装置放大导体板切割磁感应线的优点,进行阻尼器的结构设计,并对其工作原理进行详细地介绍。然后,利用电磁仿真软件(COMSOL Multiphysics)分析其在不同电流大小的情况下所产生的磁通量大小,并推导出相应磁感应强度理论公式,分析相同匝数,不同电流下的工况,结合实测数据,对比仿真、理论与试验的磁感应强度,验证理论的准确度。最后,推导出该阻尼器在电流稳定时等效阻尼系数,进而得出其电涡流阻尼力。研究结果表明:在研究速度范围内,EECD能达到设计目的,等效阻尼系数、惯质及电涡流阻尼力理论结果与试验结果基本吻合,且EECD阻尼性能接近线性;在研究速度范围内,随着电流的变化,电磁铁产生的磁通量大小及阻尼力也成正比变化;该装置滞回性能相对光滑,重复性较好,说明新型电磁式阻尼器力学性能稳定,具有可行性。In order to improve the applicability of eddy current dampers in practical engineering,a new type of actively controlled electromagnetic eddy current damper(EECD)was proposed by using an external power supply to change the magnetic flux inside the device.Firstly,considering the advantages of the magnetic circuit effectivelyusing the magnetic flux and the rotation device to amplify the conductor plate to cut the magnetic induction line,the structural design of the damper is carried out,and its working principle is introduced in detail.Then,theelectromagnetic simulation software(COMSOL Multiphysics)was used to analyze the magnitude of the magneticflux generated by the magnetic induction under different currents,and the corresponding theoretical formula ofmagnetic induction intensity was deduced.The working conditions under different currents with the same number ofturns were analyzed,and the magnetic induction intensities in the simulation,theory,and experiment werecompared based on the measured data to verify the accuracy of the theory.Finally,the equivalent dampingcoefficient of the damper under a stable current was derived,and then the eddy current damping force wasobtained.The results show that the EECD can achieve the design purpose within the research speed range,thetheoretical results of the equivalent damping coefficient,inertial mass,and eddy current damping force arebasically consistent with the experimental results,and the damping performance of EECD is nearly linear;withinthe research speed range,with the change of current,the magnetic flux and damping force generated by theelectromagnet also change proportionally;the hysteresis performance of the device is relatively smooth,and therepeatability is good,which indicates that the mechanical properties of the new electromagnetic damper are stableand thus the device is feasible.

关 键 词：主动控制 电磁 涡流阻尼器 阻尼 惯质 

分 类 号：TU352.1[建筑科学—结构工程]