火炮发射与控制学报

导体筒是永磁式电涡流制退机的关键部件，为了研究不同导体材料对永磁式电涡流制退机性能的影响，采用6061铝合金、T2紫铜材料研制导体筒部件，并进行了冲击载荷下的制动实验和电磁有限元仿真，分析了两组制退机在瞬态冲击载荷下的制动特性。结果表明：在基本相同的加载压力下，紫铜导体制退机的制动位移和制动时间明显小于铝合金导体制退机，仿真结果与实验结果基本一致。在同一瞬态冲击载荷激励下，仿真结果显示，紫铜导体制退机制动位移比铝合金导体制退机降低30%,制动时间缩短11%。制动过程中，两组制退机均出现去磁效应，但径向磁通密度相近，紫铜、铝合金导体制退机的阻尼系数比约为1.526,接近紫铜、铝合金电导率之比，表明相同结构尺寸下阻尼性能主要由导体电导率决定。该研究为提升电涡流制退机性能提供了新的技术途径，具有重要的应用价值。

The conductor cylinder is a key component of the permanent magnet eddy current recoil brake. To investigate the effects of different conductor materials on the performance of permanent magnet eddy current recoil brake, conductor cylinder components made of 6061 aluminum alloy and T2 copper were developed. Braking experiments under impact load and electromagnetic finite element simu-lations were conducted to analyze the braking characteristics of two sets of recoil brakes under transient impact loads. The results show that under approximately the same loading pressure, the braking displacement and braking time of the copper conductor recoil brake are significantly smaller than those of the aluminum alloy conductor recoil brake, and the simulation results are consistent with the experimental results. Under the same transient impact load excitation, the simulation results indicate that the braking displacement of the copper conductor recoil brake is 30% lower than that of the aluminum alloy conductor recoil brake, and the braking time is reduced by 11%. During the braking process, both recoil brakes exhibit demagnetization effects, but the radial magnetic flux density is similar. The dam-ping coefficient ratio between the copper and aluminum alloy conductor recoil brakes is about 1.526, which is close to the ratio of their electrical conductivities, indicating that the damping performance is mainly determined by the conductor′s electrical conductivity under the same structural dimensions. This study provides a new technical approach to improve the performance of eddy current recoil brakes and has important practical value.