Study on mechanical properties of eddy current damping-rack and gear damper
Li Yafeng1，2 Li Shouying1，2 Wang Jianzhong1，2 Chen Zhengqing1，2
1. Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, China；
2. College of Civil Engineering, Hunan University, Changsha 410082, China
摘要为开发性能良好的新型耗能装置，采用齿条齿轮和电涡流阻尼技术，提出一种新型的齿轮齿条式电涡流阻尼器(eddy current damping-rack and gear damper，简称ECD-RGD)，并对其力学性能进行有限元仿真和试验研究。首先，介绍ECD-RGD的构造和运动分解，并设计制作ECD-RGD样机；然后，考虑两个加载角度研究ECD-RGD的表观质量和阻尼性能；最后，对ECD-RGD的滞回性能进行试验研究。结果表明：ECD-RGD是一种实现表观质量惯性力和电涡流阻尼力并联的新型阻尼器，可将结构振动的随机方向分解为确定的相互垂直的两方向加以控制；表观质量的理论结果与试验结果、电涡流阻尼力的仿真结果与试验结果总体吻合均较好；样机试验性能稳定，齿轮齿条式电涡流阻尼器具有可应用性。
Abstract：To develop energy dissipation devices with excellent performance, a new type of eddy current damping-rack and gear damper (ECD-RGD) was proposed by utilizing the technologies of eddy current damping, rack and gear, and its mechanical properties were simulated by finite elements and tested in detail. First, the composition and motion decomposition of ECD-RGD were systematically introduced, and then a reduced-scale ECD-RGD prototype was designed and manufactured. Second, from two loading angles, the apparent mass and the damping properties of ECD-RGD were carefully studied. Finally, experimental studies on hysteretic behavior of ECD-RGD were also carried out. The results show that ECD-RGD is a new type of damper in which parallel connection of apparent mass inertia force and eddy current damping force is realized, and the random motion direction of buildings can be decomposed into two mutually perpendicular directions for vibration controls. The theoretical results of apparent mass and the simulation results of eddy current damping force are in good agreement with the corresponding experimental values. In addition, the stable experimental performance of the prototype implies the applicability of eddy current damping-rack and gear damper.
李亚峰 李寿英 王健钟 陈政清. 齿轮齿条式电涡流阻尼器的力学性能研究[J]. 土木工程学报, 2020, 53(3): 44-50.
Li Yafeng Li Shouying Wang Jianzhong Chen Zhengqing. Study on mechanical properties of eddy current damping-rack and gear damper. 土木工程学报, 2020, 53(3): 44-50.
