针对串联随进战斗部中弹丸对预开孔靶的侵彻性能，基于经典的空腔膨胀理论解析模型，建立修正的空腔膨胀理论模型，对不同尺寸预开靶孔的弹丸随进性能进行了分析。

An analytical model for the penetration of a following kinetic energy projectile into concrete targets with pre-drilled cavities is developed based on a modification of cavity expansion theory.

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为了提高纸靶重孔的测量准确性，提出一种基于图像减影技术的重孔识别方法。

In order to improve the accuracy of the measurement of superposition hole, an approximate solution based on image subtraction technique to identify the superposition holes was put forward.

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磨料水射流加工孔的直径和深度随靶距的增加而增加。

The diameter and depth of the holes eroded by HPAWJ increase with the increase of stand-off-distance.

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