摘要
为了更好分析磁极结构对永磁体利用率的影响以及实现板式电涡流阻尼器适应多向运动等情况,提出一种Halbach永磁体双向阵列结构,并对7种磁路结构方案开展参数对比分析.首先通过对比某一板式电涡流阻尼器的试验结果,验证了采用三维电磁场有限元瞬态分析方法仿真板式电涡流阻尼器阻尼性能的准确性.制作了一个Halbach循环阵列板式电涡流阻尼器,基于三维电磁有限元分析方法,与不同的磁路结构对比分析,研究了永磁体磁极对数、永磁体背铁、空气间隙、导体板等因素对板式电涡流阻尼力的影响.研究表明,Halbach双向阵列电涡流阻尼器在多向运动下能保持较好的耗能效率.通过分析仿真结果还发现,不同的板式电涡流永磁体方式存在相似的阻尼力速度梯度曲线,依靠曲线函数可在短时间内得出较为准确的板式电涡流阻尼器在不同相对速度下的阻尼力,可大幅提升板式电涡流阻尼力的计算效率.
To better analyze the influence of magnetic pole structure on the utilization rate of permanent magnet and realize the adaptability of plate eddy current damper to multi-directional motion,a bidirectional array structure of Halbach permanent magnet is proposed,and the parameters of seven magnetic circuit structure schemes are compared and analyzed.Firstly,by comparing the test results of a plate-type eddy current damper,the accuracy of simulating the damping performance using a three-dimensional electromagnetic finite element transient analysis method is verified.A Halbach cyclic array plate eddy current damper is fabricated.Based on three-dimensional electromagnetic finite element analysis method,the influence of pole number of permanent magnet,back iron of permanent magnet,air gap,conductor plate and other factors on plate eddy current damping coefficient is studied.The research shows that Halbach bidirectional array eddy current damper can maintain good energy dissipation efficiency under multi-direction motion.Through the analysis of simulation results,it is also found that different types of plate-eddy current permanent magnets have similar damping force velocity gradient curves,and the damping force of plate-eddy current dampers at different speeds can be obtained in a short time by relying on the curve function,which can greatly improve the computational efficiency of plate-eddy current damping force.
作者
何晴光
洪祺凯
周梓豪
朱前坤
程进生
HE Qingguang;HONG Qikai;ZHOU Zihao;ZHU Qiankun;CHENG Jinsheng(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou 730050,China;Suqian City Construction Investment(Group)Co.,Ltd.,Suqian 223800,China)
出处
《湖南大学学报(自然科学版)》
北大核心
2025年第11期101-117,共17页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(52168041)。
