南京理工大学学报（自然科学版）2025，Vol.49Issue(2)：201-210,10.DOI:10.14177/j.cnki.32-1397n.2025.49.02.008
永磁式电涡流制退机的磁场屏蔽性能与优化研究
Research on the magnetic field shielding performance and optimization of permanent magnet eddy current recoil mechanism
摘要
Abstract
The permanent magnet electromagnetic recoil mechanism utilizes magnetic fields as energy transmission medium.Under the high energy density magnetic field requirements of artillery firing,magnetic leakage is inevitable,posing risks of magnetic field interference on sensitive components in intelligent weapon systems.To address this issue,numerical models were developed for two typical magnetic circuit structures:the widely used axial magnetization array and the more energy-efficient Halbach array.Comparative analysis revealed magnetic field distribution characteristics and leakage under different arrays—the axial magnetization model exhibits a more uniform magnetic field distribution,whereas the Halbach magnetization model exhibits a more concentrated magnetic field distribution.To optimize magnetic guidance and shielding,a three-layer optimal shielding structure(magnetic guidance-isolation-guidance)was designed,leveraging the properties of ferromagnetic and magnetic isolation materials.The magnetic field distributions of different shielding material structures were compared.The external shielding effectiveness values were 15.87 dB(axial)and 14.88 dB(Halbach),with internal shielding effectiveness reaching 11.498 dB(axial)and 13.18 dB(Halbach),respectively.This configuration significantly enhanced electromagnetic damping force,reducing both recoil distance and duration.Finally,considering the matching problem of different shielding layers,parameter optimization under fixed total shielding layer thickness constraints yielded the shielding layer thickness with the best shelding effect,improving shielding effectiveness by 15%for both array types.关键词
电磁制退机/磁场分布/有限元法/磁场屏蔽Key words
electromagnetic recoil mechanism/magnetic field distribution/finite element method/magnetic field shielding分类
数理科学引用本文复制引用
赵昱,杨国来,李雷,王丽群..永磁式电涡流制退机的磁场屏蔽性能与优化研究[J].南京理工大学学报（自然科学版）,2025,49(2):201-210,10.基金项目
博士后创新人才支持计划(BX2021126) （BX2021126）
