为了满足高端装备对环境振动隔离不断提升的需求, 提出一种基于电涡流阻尼的具有宽频高性能隔振效果的四参数隔振器. 首先, 建立隔振器的归一化振动传递模型, 利用安培环形电流模型与磁场叠加定理, 推导出电涡流阻尼机构的磁场分布与阻尼特性解析模型; 然后,采用有限元法对电涡流阻尼机构进行仿真分析, 验证解析模型的准确性, 为电涡流阻尼四参数隔振器优化设计与性能验证提供模型基础. 数值分析表明：相较于两参数隔振器, 在频域角度, 四参数隔振器存在最优阻尼, 使系统共振峰得到有效抑制的同时高频衰减性能不变差, 中频段的隔振性能略有损失, 但系统的宽频综合隔振性能得到提升; 在时域角度, 四参数隔振器的时域稳态响应与频域分析相吻合, 且能够更快地达到稳定状态, 具有更好的瞬态性能; 输入最大幅值 1.03 mm 的随机激励, 四参数隔振器的响应最大幅值降低至 0.22 mm, 隔振率达到78.6%, 隔振效果显著.

: To satisfy the increasing demand for environmental vibration isolation in high-precision equipment, this study proposes a four-parameter vibration isolator based on eddy current damping. The isolator exhibits wideband and high-performance isolation effects. First, the normalized vibration transmissibility of the isolator was established, and the magnetic field distribution and characteristics of the eddy current damping mechanism were analytically derived using Ampere’s circuit current model and superposition theorem of magnetic fields. Subsequently, finite element analysis was employed to simulate and validate the accuracy of the analytical model of the eddy current damping mechanism, thereby providing a basis for the optimization design and performance verification of the four-parameter vibration isolator. Numerical analysis of the isolation performance indicated that compared with two-parameter isolators, the four-parameter isolator exhibits optimal damping in the frequency domain, effectively suppressing the resonance peak while main-taining high-frequency attenuation performance. Although there was a slight loss in the midfrequency range, the overall wideband isolation performance of the system improved. In the time domain, the steady-state response of the four-parameter isolator aligned with the frequency-domain analysis and achieved stability more rapidly, exhibiting superior transient performance. The four-parameter isolator reduced the random excitation from 1.03 mm to 0.22 mm, achieving an isolation rate of 78.6%, which indicates significant isolation effectiveness.