When permanent magnets are surrounded by ferromagnetic materials, the magnetic field lines are rerouted in the air gap between them, which provides an approach for the optimum design of the eddy current damper. To improve the conventional tubular eddy current damper design, an enhanced eddy current damper with a ferromagnetic shaft and a ferromagnetic layer is successfully developed in this study. It is passive, cost-efficient and reliable, significantly boosting the damping effect without occupying extra space. To explore the benefits of the ferromagnetic material, analytical models of the magnetic field distributions are derived to estimate the damping coefficient. In addition, the ferromagnetic material configuration and dimensions of the proposed eddy current damper are optimized for better vibration suppression. The experiment results agree reasonably well with the theoretical models and finite element predictions, and demonstrate the effectiveness and efficiency of this in...

中文翻译：

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考虑磁聚集效应的涡流阻尼器的优化设计

当永磁体被铁磁材料包围时，磁力线会在它们之间的气隙中重新布线，这为涡流阻尼器的最佳设计提供了一种方法。为了改进传统的管状涡流阻尼器设计，在本研究中成功开发了具有铁磁轴和铁磁层的增强型涡流阻尼器。它是无源的，经济高效且可靠的，可在不占用额外空间的情况下显着提高阻尼效果。为了探索铁磁材料的优势，推导了磁场分布的分析模型以估计阻尼系数。另外，所提出的涡流阻尼器的铁磁材料构造和尺寸被优化以更好地抑制振动。