华南地震2024，Vol.44Issue(2)：144-152,9.DOI:10.13512/j.hndz.2024.02.17
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
摘要
Abstract
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 effectively using 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,the electromagnetic simulation software(COMSOL Multiphysics)was used to analyze the magnitude of the magnetic flux generated by the magnetic induction under different currents,and the corresponding theoretical formula of magnetic induction intensity was deduced.The working conditions under different currents with the same number of turns were analyzed,and the magnetic induction intensities in the simulation,theory,and experiment were compared based on the measured data to verify the accuracy of the theory.Finally,the equivalent damping coefficient of the damper under a stable current was derived,and then the eddy current damping force was obtained.The results show that the EECD can achieve the design purpose within the research speed range,the theoretical results of the equivalent damping coefficient,inertial mass,and eddy current damping force are basically consistent with the experimental results,and the damping performance of EECD is nearly linear;within the research speed range,with the change of current,the magnetic flux and damping force generated by the electromagnet also change proportionally;the hysteresis performance of the device is relatively smooth,and the repeatability is good,which indicates that the mechanical properties of the new electromagnetic damper are stable and thus the device is feasible.关键词
主动控制/电磁/涡流阻尼器/阻尼/惯质Key words
Active control/Electromagnet/Eddy current damper/Damping/Inertial mass分类
建筑与水利引用本文复制引用
彭金强,刘彦辉,陈克坚,戴胜勇,张志勇,张颖..新型电磁式涡流阻尼器力学性能研究[J].华南地震,2024,44(2):144-152,9.基金项目
政府间国际科技创新合作(2021YFE0112200) （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. （2015-重点-07）
