步枪弹侵彻带软硬复合防护明胶靶标的数值模拟

doi:10.3969/j.issn.1000-1093.2014.08.006

兵工学报 ›› 2014, Vol. 35 ›› Issue (8): 1172-1178.doi: 10.3969/j.issn.1000-1093.2014.08.006

步枪弹侵彻带软硬复合防护明胶靶标的数值模拟

罗少敏¹, 徐诚¹, 陈爱军², 张晓云¹, 刘苏苏¹

(1.南京理工大学机械工程学院江苏南京 210094；2.南京理工大学理学院江苏南京 210094）

收稿日期:2013-10-25 修回日期:2013-10-25 上线日期:2014-11-03
作者简介:罗少敏（1987—），男，博士研究生

Numerical Simulation of Bullets Penetrating into Gelatin Target with Hard/Soft Composite Armor

LUO Shao-min¹， XU Cheng¹， CHEN Ai-jun²， ZHANG Xiao-yun¹， LIU Su-su¹

(1.School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，Jiangsu，China;2.School of Science, Nanjing University of Science and Technology，Nanjing 210094，Jiangsu，China)

Received:2013-10-25 Revised:2013-10-25 Online:2014-11-03

摘要/Abstract

摘要： 为研究步枪弹撞击带软硬复合防护明胶靶标的作用过程和作用机理，采用显式有限元方法对7.62 mm步枪弹侵彻复合靶标过程进行数值模拟，分析侵彻过程中的典型现象及明胶靶标动态响应。数值计算结果表明：陶瓷锥的形成是由压缩应力波和拉伸应力波共同作用的结果；弹头加速度变化存在明显的分段与拐点，侵彻陶瓷面板过程中，加速度达到最大，侵彻聚乙烯（PE）背板层时，出现第二个拐点；由于防护层存在多个界面，撞击过程中PE背板界面存在速度多峰现象：当弹头运动加速度达到最大时，PE背板界面出现第一个速度峰，明胶界面出现第一个压力峰；当弹头开始侵彻PE背板时，背板层出现第二个速度峰；在步枪弹撞击过程中明胶内压力波传递呈现球形波基本形态，压力峰值随距离增加呈指数衰减。

关键词: 兵器科学与技术, 枪弹, 数值模拟, 软硬复合防护, 明胶, 侵彻

Abstract: In order to explore the interaction process and mechanism of bullet impacting a gelatin target with hard/ soft composite armor，the penetration of 7.62 mm bullet into composite armor and gelatin is numerically simulated using an FEA method，and the typical phenomena of impacting process and the dynamic response of gelatin target are analyzed. The simulation results show that the formation of the ceramic cone results from the compressive and tensile stress waves. The obvious segmentation and inflection points display on the curve of projectile acceleration. The acceleration reaches its maximum when the projectile penetrates into a ceramic faceplate. The second inflection point appears when the projectile penetrates into PE rear plate. The multi-peaks appear on the velocity curve of PE rear plate due to multiple interfaces on protection layer：When the projectile reaches the maximum acceleration，the first peak appears，and the first pressure peak appears on gelatin interface；the second peak appears when the projectile penetrates into PE rear plate. The propagation of pressure wave in gelatin presents the basic form of spherical wave， and the pressure peak propagation complies with the law of exponential decay.

Key words: ordnance science and technology, bullet, numerical simulation, hard/soft composite armor, gelatin, penetration

中图分类号:

TJ012.4

罗少敏, 徐诚, 陈爱军, 张晓云, 刘苏苏. 步枪弹侵彻带软硬复合防护明胶靶标的数值模拟[J]. 兵工学报, 2014, 35(8): 1172-1178.

LUO Shao-min， XU Cheng， CHEN Ai-jun， ZHANG Xiao-yun， LIU Su-su. Numerical Simulation of Bullets Penetrating into Gelatin Target with Hard/Soft Composite Armor[J]. Acta Armamentarii, 2014, 35(8): 1172-1178.

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步枪弹侵彻带软硬复合防护明胶靶标的数值模拟

Numerical Simulation of Bullets Penetrating into Gelatin Target with Hard/Soft Composite Armor

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