为探究励磁线圈磁场对金属射流变形的作用机理，提出了励磁线圈脉冲磁场作用下，金属射流中感应电流密度、磁感应强度及电磁力密度分布的理论模型，建立了励磁线圈约束金属射流的有限元模型，进行了电磁-温度-结构多物理场耦合分析，最后进行了试验验证。结果表明，励磁线圈磁场能够对金属射流进行有效约束，电磁力做功和欧姆热效应的累积，引起金属射流发生有效变形，使金属射流整体更加均匀，进而可延缓金属射流劲缩部分断裂的过程，增强破甲弹对目标的侵彻穿深能力。

In order to study the action mechanism of magnetic field of a coil to restraint deformation of a shaped charge jet (SCJ), the theoretical models of magnetic flux intensity distribution, induced current density distribution and electromagnetic force density distribution in a SCJ under the action of pulse magnetic field of a magnet exciting coil were proposed. The finite element (FE) model for the coil to restraint deformation of SCJ was established considering the electromagnetic-temperature-structure multi-physical field coupling analysis. The FE analysis results were verified with tests. The results showed that SCJ can be effectively restricted by the magnetic field of the coil; electromagnetic force doing work and Ohmic heating effect’s cumulation make SCJ generate effective deformation and become more uniform; the fracture process of necking down part of SCJ can be delayed, and the penetrating capacity of high explosive anti-tank cartridge can be enhanced.