The breach of a steel column target (Steel 45, 120 mm in diameter) by an inward-cutting circular shaped charge is considered. The jet penetration process is simulated by a 3D model run in the ANSYS/LS-DYNA program. The results are compared with actual tests, where photographs of the jet penetration process allowed observation of detonation forms, timing of the jets arising at the cross section of the detonation points, and detonation wave collision points. Different penetration effects are observed with 2-, 4-, or 8-point symmetrical synchronous initiation of detonation. With 2-point initiation, the circular-shaped charge can basically cut off the steel column target, but 4- and 8-point initiation is more effective. A greater number of detonation points provides more detonation wave collision points, higher jet velocity, earlier jet-target contact, greater penetration depth, and more rapid cutting of the target.

中文翻译：

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不同爆点数内切圆形装药的射流穿透效应

考虑了向内切割的圆形装药破坏钢柱目标（钢 45，直径 120 毫米）。射流穿透过程通过在 ANSYS/LS-DYNA 程序中运行的 3D 模型进行模拟。结果与实际测试进行了比较，其中射流穿透过程的照片允许观察爆震形式、射流在爆震点横截面处出现的时间以及爆震波碰撞点。通过 2 点、4 点或 8 点对称同步起爆观察到不同的穿透效果。2点起爆，圆形装药基本可以切断钢柱目标，但4点和8点起爆效果更好。更多的爆点提供更多的爆震波碰撞点，更高的射流速度，更早的射流与目标接触，