Assessment of Penetration Performance and Optimum Design of a Bore‐Center Annular Shaped Charge

Abstract

To improve penetration performance of the classical conical shaped charge, a bore-center annular shaped charge (BCASC) was designed and effects of key parameters on its formation and penetration into concrete targets were investigated numerically and experimentally. As a result, suitable parameters of the BCASC, which comprehensive consideration of penetration hole diameter and depth into concrete targets, were provided. Subsequently, tests of the optimized BCASC penetration into single-layer and doublelayer concrete targets were performed. The results indicate that, for all the cases, the diameters of the rear crater are larger than that of the front ones. The influence of factors h (standoff distance) and f (the radial distance between the center of the inner and outer liner wall) on the diameters of the front crater, the penetrating tunnel, and the rear crater are greater than that of other factors. The diameters of the front crater and the penetrating tunnel decrease with the increase of factors h and f. The penetration depth of optimized BCASC into concrete exceeds 3.0 times of the charge diameter (D). Hole diameters of penetrating tunnels are larger than the charge diameter. For the single-layer concrete target, the hole diameter of the penetrating tunnel is 2.26D. And, for the double-layer concrete target, the hole diameters of the first and second layers are 1.41D and 1.33D, respectively.

The Influence of Closed-Cell W-Shaped Liner Parameters on the Penetration Performance of Integral Annular Shaped Charge

“…Hence, there is no design under these conditions. The values of the various factor levels are shown in Table 3 [ 12 ].…”

“…Zhang Z et al set up the SPH (Smoothed Particle Hydrodynamics) model of the annular jet penetrating the steel target and then made comparisons between the numerical results and experimental data [ 10 ]. Xu W et al optimized the parameters of the liner in the annular shaped charge structure by numerical simulation and experimental verification, with the optimal value of the parameters being obtained [ 11 , 12 , 13 ]. To get a better destructive effect of the metal jet on the double-hull submarine, Hu Z et al designed a new combined annular shaped charge structure that can form rod-liked jets and annular jet penetrators [ 14 ].…”

Damage Effects of Shaped Charges on Concrete Piles

“…Wang et al [2] investigated the efect of liner material on the penetration ability of the shaped charge by conducting concrete penetration tests using three liner materials. Xu et al [3] designed a bore-centered annular shaped charge (BCASC) and conducted penetration tests on concrete by this shaped charge to investigate the efect of key parameters of this structure on its penetration capability. Zu et al [4] investigated the particle fow fragmentation process of a Zrbased amorphous alloy.…”