Vulnerability evaluation of concrete obstacle under action of shaped charge penetrators
MA Shixin1, XIE Xingbo2, LI Xiangdong1, ZHONG Mingshou2, JI Yangziyi1
1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2.College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China
Abstract：To study the vulnerability of concrete obstacles subjected to shaped charge penetrator hits, the vulnerability of concrete obstacles hit by jetting projectile charge (JPC) and explosively formed penetrator (EFP) was evaluated through experimental and numerical studies. The results show that a suborbicular or approximative notched oval-shaped damage zone is generated when the top or side face of the obstacle is hit. The severity of damage increases as the hit location moves closer to the center of the damage zone. When the penetrators hit the top face vertically, the center of the damage area coincides with the center of the top. When the side face is hit horizontally, the center of the damage area coincides with the geometric center of the side. When the penetrators hit obliquely upward, the center of the damage zone generated by JPC and EFP moves down by about 27.8 cm and 28.2 cm, respectively, whereas it moves up by about 26.5 cm and 28.7 cm when the penetrator hits the side obliquely downward. The concrete obstacle tends to be severely damaged when the penetrators hit the side horizontally. Furthermore, JPC demonstrates higher damage capability on the concrete obstacles than EFP with the same caliber charge under the same hit conditions.
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