中厚背水金属靶板抗钝头弹高速侵彻机制分析  

Research on the Mechanism of Moderately Thick Water-Backed Metal Plates Penetrated by High-Velocity Blunt-Nosed Projectiles

作　　者：陈长海[1] 侯海量[1] 张元豪[1] 朱锡[1] 戴文喜 

机构地区：[1]海军工程大学舰船工程系,武汉430033 [2]中国舰船研究设计中心,武汉430064

出　　处：《上海交通大学学报》2017年第12期1428-1434,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51409253;51479204)资助

摘　　要：为探讨中厚背水金属靶板抗高速钝头弹垂直侵彻机制,根据不同的受力状态及耗能机制,结合中厚背水靶板抗高速侵彻特点,将高速钝头弹垂直侵彻中厚背水金属靶板的过程分为压缩镦粗、剪切压缩和剪切扰动3个阶段.基于3阶段侵彻机制,建立了钝头弹高速侵彻中厚背水金属靶板的瞬时余速计算模型.采用该模型计算了质量为3.3g的立方体破片弹丸侵彻厚度为5mm背水钢板的瞬时余速,理论计算值与实验结果及相应的模拟计算结果均吻合较好.由于计算模型考虑了靶后水介质的动支撑作用和动能耗散等效应,对高速钝头弹侵彻中厚背水金属靶板的瞬时余速能进行更合理的预测,具有一定的理论价值和工程应用价值.To explore the mechanism of moderately thick water-backed metal plates penetrated by high-velocity blunt-nosed projectiles,the whole process of high-velocity blunt-nosed projectiles perpendicularly penetrating moderately thick water-backed metal plates was divided into three consecutive phases,i.e.,compression and mushrooming phase,shearing and compression phase and shearing and intruding phase,according to different mechanical states and energy-dissipative mechanisms during penetrating process together with the high-velocity penetration-resistant characteristic of moderately thick water-backed metal plates.Based on the 3-phase penetration mechanism,an analytical model was established to calculate instantaneous residual velocities of the blunt-nosed projectiles perforating moderately thick water-backed metal plates.By adopting the model,the instantaneous residual velocities of cubic projectiles with 3.3 g penetrating 5 mm-thick water-backed steel plates were computed.Good agreements were obtained between the theoretical values and experimental results as well as corresponding numerical results.Due to the consideration for several phenomena,such as the dynamic supporting action and kinetic energy dissipation effort of the water medium behind the target,the 3-phase model can be employed to more reasonably predict the instantaneous residual velocities of the blunt-nosed projectiles perforating moderately thick waterbacked metal plates,and therefore,has theoretical and engineering application value.

关 键 词：穿甲力学 高速钝头弹 背水靶板 瞬时余速 理论模型 

分 类 号：O385[理学—流体力学]