CAJ | 학술논문

基于电涡流原理提出一种新型的可用于航天器振动被动抑制的电涡流阻尼器。首先，依托数值仿真建立阻尼器的磁场和力学有限元分析模型，对阻尼器的性能进行分析计算。其次，在振动测试实验台上进行阻尼特性测试，获得了小位移0.1 mm、大位移1 mm下的1 Hz～50 Hz频率范围内正弦激励作用工况下的阻尼系数。然后根据Bouc-Wen滞回模型建立了阻尼器的力学模型，研究了负载、阻尼器结构、交变洛仑兹力之间的关系。研究结果表明这种新型的电涡流阻尼器在外载激励作用下能够输出与仿真结果较为接近的阻尼力，且阻尼系数随激励频率变化具有明显的规律性，根据仿真和实验结果建立的阻尼力力学模型可以很好地用于电涡流阻尼器的力学特性仿真分析。
기우전와류원리제출일충신형적가용우항천기진동피동억제적전와류조니기。수선，의탁수치방진건립조니기적자장화역학유한원분석모형，대조니기적성능진행분석계산。기차，재진동측시실험태상진행조니특성측시，획득료소위이0.1 mm、대위이1 mm하적1 Hz～50 Hz빈솔범위내정현격려작용공황하적조니계수。연후근거Bouc-Wen체회모형건립료조니기적역학모형，연구료부재、조니기결구、교변락륜자력지간적관계。연구결과표명저충신형적전와류조니기재외재격려작용하능구수출여방진결과교위접근적조니력，차조니계수수격려빈솔변화구유명현적규률성，근거방진화실험결과건립적조니력역학모형가이흔호지용우전와류조니기적역학특성방진분석。
Based on the eddy current principle, a novel eddy current damper applicable to attenuating vibration of spacecraft is proposed. Firstly, by virtue of the numerical simulation, the magnetic and mechanical finite element model is es-tablished to analyze the damping characteristics of the eddy current damper. Then the damping characteristic is tested on a vi-bration test bench, where the sinusoidal excitation with amplitudes of 0.1mm and 1mm are applied respectively in the fre-quency range of 1-50Hz. Finally, the mechanical model of the damper is established based on the Bouc-Wen hysteretic theo-ry, which is used to study the relationship among the loading, the damper structure, and the alternative Lorentz force. The re-sults show that this new eddy current damper can provide a damping force under the excitation loading. The damping force acquired from the test is close to that of the simulation results. Therefore, the presented model can be efficiently used to re-flecting the mechanical properties of the eddy current damper.