在LS-DYNA中对破甲弹聚能射流产生机理进行了仿真,得到射流形态及进入颈缩过程的时间,而后在仿真软件Ansoft中建立射流和线圈3D模型,并利用电容器对线圈放电产生高频轴向磁场。仿真结果表明:在外磁场作用下,金属射流表面产生的感应电流与外部磁场作用会产生径向向内的电磁力。由分析得到的电磁力密度分布情况可知,射流凸起位置产生的向内的电磁力最大,而凹陷位置的电磁力较弱,射流的穿深效果由此增强。

The finite element software LS-DYNA was used to simulate the formation process of shaped-charge jet and deformation part after that, by which the parameters and shape characters were obtained. Then the jet and coil 3D models were created in the finite software ANSOFT, capacitor was discharged to coil, by which an axial high-frequent magnetic field was produced. Then the process of shaped charge jet passing through a high-frequent magnetic field was simulated. The simulation results show that under the impact of external magnetic field, the surface of the jet would present induced current which would produce a radial inward electromagnetic force after being affected by the magnetic field. By analyzing the electromagnetic force density distribution, it can be discovered that the force of the bulge is larger than that of the dent, which means that under the existence of axial high-frequent magnetic field, the necking phenomenon of the jet is weaken. Therefore, the effective length of the jet grows and the purpose of strengthening the shaped charge jet is achieved.