Dynamic characteristics of cylindrical eddy current damper under impact load

被引：0
|
作者：
Wang N. [1 ]
Liu N. [1 ]
Shen Y. [1 ]
Sun M. [1 ]
机构：
[1] School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 11期
关键词：
Damping coefficient; Eddy current damper; Eddy current damping force; Impact load; Magnetic field;
D O I：
10.13465/j.cnki.jvs.2021.11.009
中图分类号：
学科分类号：
摘要：
Here, in order to study dynamic characteristics of cylindrical eddy current damper under impact load, the dynamic model of eddy current damper under impact load was established. The finite element model of cylindrical eddy current damper under impact load was established using the analysis software Maxwell, and the air gap magnetic field and eddy current distribution were analyzed. Relations of eddy current damping force and damping coefficient versus speed, respectively in braking deceleration stage were studied, and effects of working air gap, thickness of conductor cylinder and yoke thickness on braking performance of eddy current damper were analyzed. The impact loading test device of eddy current damper was developed, and test results agreed better with simulation ones. The study results showed that under the premise of ensuring motion accuracy of mover, working air gap should be as small as possible, yoke thickness should be 3/4 of permanent magnet thickness, and conductor cylinder thickness should be 1-2 mm, which are favorable to improve damping coefficient of eddy current damper; eddy current damper has good cushioning and braking performance under impact load, and has important application value in impact braking fields of weapon launching, train braking, etc. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：65 / 69and93
页数：6928
相关论文
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