超高速钨合金长杆弹侵彻花岗岩靶的毁伤效应  

Damage effect of granite target caused by hypervelocity penetration of long tungsten alloy rod projectile

作　　者：吴耀鹏[1] 李嘉樾 钱秉文[2] 张伟[1] 邢泽晖 Wu Yaopeng;Li Jiayue;Qian Bingwen;Zhang Wei;Xing Zehui(Xi'an University of Architecture&Technology,Xi'an 710055,China;Northwest Institute of Nuclear Technology,Xi'an 710024,China)

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]西北核技术研究院,陕西西安710024

出　　处：《土木工程学报》2024年第11期81-91,共11页China Civil Engineering Journal

基　　金：强动载与效应重点实验室开放项目(IDEL2106);陕西省自然科学基础研究计划(2023-JC-YB-435)。

摘　　要：为研究钨合金长杆弹超高速侵彻花岗岩靶的毁伤规律,文章选用长径比为10∶1的钨合金长杆弹,应用二级轻气炮平台开展弹体在1.6~3.85km/s弹速下的侵彻花岗岩靶的试验,并基于LS-DYNA软件对超高速侵彻过程进行数值模拟。结果表明:(1)不同弹速下花岗岩靶的成坑模式不同,在相对低速(1.6~1.8km/s)时,呈现两边高中间低的“漏斗形”,在相对高速(1.99km/s及以上)时,呈现中间高两边低的“蘑菇头形”,且弹速越高,蘑菇头越扁平;(2)侵彻深度与弹速呈现“上升—下降—上升”的三段式非正比例形态,在1.99km/s后出现侵彻逆减现象,直到2.32km/s后侵彻深度再次随弹速增加而增加;(3)不同弹速下的裂纹数量和最大裂纹长度随弹速的增加而增加,并不受侵彻机制转变的影响。研究结果可为动能弹打击地下工事花岗岩掩体提供参考,具有十分重要的工程价值。In order to study the damage law of granite target caused by hypervelocity penetration of long tungsten alloy rod projectile,a long tungsten alloy rod with the length-diameter ratio of 10:1 was selected,a two-stage light-gas gun platform was used to carry out the experiment of the projectile penetrating the granite target at the projectile velocity of 1.6~3.85 km/s,and the corresponding ultra-high speed penetration process was numerically simulated using LS-DYNA software.The results show that:(1)the cratering modes of granite targets differ due to different projectile velocities,and specifically the crater of the granite target appears to be the"funnel shape"with high periphery and low central part at relatively low velocity(1.6~1.8 km/s),and the"mushroom head shape"with high central part and low periphery at relatively high velocity(1.99 km/s and above);(2)the penetration depth is not proportional to the projectile velocity,but it appears to be the three-stage shape of"rise-fall-rise",that is,the penetration depth decreases with the velocity given a velocity greater than 1.99 km/s,and the penetration depth increases again with the velocity given a projectile velocity greater than 2.32 km/s;(3)the number of cracks and the maximum crack length increase with the projectile velocity,and are not affected by the change of penetration mechanism.The research results provide a reference for kinetic energy bombs to hit granite bunkers in underground fortifications,which shall be of great engineering value.

关 键 词：侵彻 超高速 毁伤效应 钨合金长杆弹 花岗岩 

分 类 号：TU521.2[建筑科学—建筑技术科学]