不同端盖厚度的圆柱形装药壳体破片初速分布  

Initial Velocity Distribution of Fragments from Cylindrical Charge Shells with Different Thick End Caps

作　　者：高月光 冯顺山[1] 刘云辉[1] 黄岐 GAO Yueguang;FENG Shunshan;LIU Yunhui;HUANG Qi(State Key Lab of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《兵工学报》2022年第7期1527-1536,共10页Acta Armamentarii

摘　　要：端盖厚度是杀伤战斗部威力精准设计时需考虑的重要因素之一,为此开展了一端中心起爆且带不同厚度端盖的圆柱形装药壳体破片初速分布特性的研究。基于理论分析和SPH数值仿真方法,建立不同厚度端盖的圆柱形装药壳体数值模型,进而提出破片初速轴向分布理论计算公式。结果表明:随着端盖厚度的增加,轴向稀疏波作用递减,壳体两端破片速度相应增加;爆轰产物加速效应是起爆端破片增速的主因,爆轰波加速效应是非起爆端破片增速的主因;相对起爆端,非起爆端破片加速更为显著。得到的公式更适用于工程中不同端盖厚度和材质的条件,误差显著减小,可为有关杀伤战斗部破片参数精准设计提供参考。The end cap thickness is an important factor to be considered in the accurate design of fragmentation warheads,so this study focues on the initial velocity distribution of fragments from cylindrical charge shell with different thick end caps,which is detonated at the center of one end.Based on theoretical analysis and SPH numerical simulation,the models of cylindrical shells are established,and then the theoretical formula of axial distribution of the initial fragment velocity is proposed.The results show that,with the increase in thicknesses of two end caps,the effect of axial rarefaction waves decreases,and the fragment velocity near the two ends increases accordingly.The acceleration effect of detonation products is the main cause of the velocity increase of fragments near the detonation end,while the acceleration effect of detonation waves is the main cause of the velocity increase of fragments near the non-detonation end.Compared with the fragments near the detonation end,the acceleration of the fragments near the non-detonation end is more apparent.The proposed formula is more suitable for end caps and materials in engineering and the relative error can be significantly reduced.The findings of this study can provide reference for the accurate design of warheads.

关 键 词：兵器科学与技术 破片初速 格尼公式 轴向稀疏波 数值模拟 

分 类 号：TJ012.4[兵器科学与技术—兵器发射理论与技术]