摘要
为了研究蓄液结构在弹体低速侵彻作用下的损伤失效特性,利用轻气炮结合高速摄影技术对蓄液结构进行了两种不同形状弹头的低速撞击实验。对两种弹体入水后的速度衰减及空泡扩展分别进行了分析,进而获得了蓄液结构内空泡扩展及溃灭的典型作用过程及蓄液结构前后面板的典型失效模式,并在此基础上讨论了弹速及弹头形状对结构损伤的影响。研究结果表明:相同速度条件下,半球形弹在水中的速度衰减及产生的空泡半径均弱于平头弹,平头弹对蓄液结构造成的毁伤程度更大,在该研究速度范围内,靶板的局部变形量与弹速成线性关系。
In order to study damage characteristics of a liquid-filled tank impacted by low speed projectiles,the low speed impacting tests with projectiles of two different shapes were conducted using a light gas gun and a high speed photograph technique. Velocity decays of two projectiles after entering water and cavitation expanding in the tank were analyzed. The typical processes of cavitation expansion and collapse,and the typical failure modes of the front and rear panels of the liquid-filled tank were obtained. The effects of projectiles' velocity and nose shape on the tank's damage were discussed. The test results showed that the hemi-spherical projectile 's velocity decay in water and its produced cavitation radius are weaker than those of the flat projectile under the same velocity conditions,the damage level of the liquid-filled tank caused by the flat projectile is larger; within the velocity range studied here,the target plate's local deformation has a linear relation to projectile velocity.
引文
[1]朱锡,张振华,梅志远,等.舰船结构毁伤力学[M].北京:国防工业出版社,2013.
[2]DAVID T,NICK P,PETER M D.Failure of fluid filled structures due to high velocity fragment impact[J].International Journal of Impact Engineering,2003,29:723-733.
[3]DELETOMBE E,FABIS J,DUPAS J,et al.Experimental analysis of 7.62 mm hydrodynamicram in containers[J].Journal of Fluids and Structures,2013,37(2):1-21.
[4]NISHIDA M,TANAKA K.Experimental study of perforation and cracking of water-filled aluminum tubes impacted by steel spheres[J].International Journal of Impact Engineering,2006,32(12):2000-2016.
[5]VARAS D,ZAERA R,PUENTE J L.Experimental study of CFRP fluid-filled tubes subjected to high-velocity impact[J].Composite Structures,2011,93(10):2598-2609.
[6]李营,吴卫国,郑元洲,等.舰船防护液舱吸收爆炸破片的机理[J].中国造船,2015,56(2):38-44.LI Ying,WU Weiguo,ZHENG Yuanzhou,et al.Study on Mechanism of explosive fragments absorbed by vessel protective tank[J].Shipbuilding of China,2015,56(2):38-44.
[7]蔡斯渊,侯海量,吴林杰.隔层设置对防雷舱液舱防护能力的影响[J].哈尔滨工程大学学报,2016,37(4):527-532.CAI Siyuan,HOU Hailiang,WU Linjie.Influence of installed interlayers on defensive efficiency of a warship’s liquid cabin[J].Journal of Harbin Engineering University,2016,37(4):527-532.
[8]ZHANG Aman,YANG Shutao,YAO Xiongliang,et al.Numerical simulation of the penetration of fuel-filled tank by a high-speed projectile[J].Journal of Ship Mechanics,2010,14(9):998-1007.
[9]李典,朱锡,侯海量,等.高速杆式弹体侵彻下蓄液结构载荷特性的有限元分析[J].爆炸与冲击,2016,36(1):1-8.LI Dian,ZHU Xi,HOU Hailiang,et al.Finite element analysis of load characteristic of liquid-filled structure subjected to high velocity long-rod projectile penetration[J].Explosion and Shock Waves,2016,36(1):1-8.
[10]任鹏,田阿利,张伟,等.5A06铝合金力学性能测试及其平板抗水下冲击动态响应分析[J].振动与冲击,2016,35(14):77-82.REN Peng,TIAN Ali,ZHANG Wei,et al.Mechanical property tests and dynamic response analysis for 5A06 alloy plates subjected to underwater shock loading[J].Journal of Vibration and Shock,2016,35(14):77-82.
[11]GUO Zitao,ZHANG Wei,XIAO Xinke,et al.An investigation into horizontal water entry behaviors of projectiles with different nose shapes[J].International Journal of Impact Engineering,2012,49(2):43-60.
[12]HUANG Wei,ZHANG Wei,REN Peng,et al.An experimental investigation of water-filled tank subjected to horizontal high speed impact[J].Experimental Mechanics,2015,55(6):1123-1138.
[13]ZHAO Y P,YU T X,FANG J.Large dynamic plastic deflection of a simply supported beam subjected to rectangular pressure pulse[J].Archive of Applied Mechanics,1994,64(3):223-232.
[14]ZHAO Y P,YU T X,FANG J.Dynamic plastic response of structures with finite deflections and saturation impulse[C]∥In Proc.IUTAM Symp.on Impact Dynamics.Beijing:Peking University Press,1995.
