【作者】 李成兵； 沈兆武； 裴明敬；

【Author】 LI Cheng-bing~1,SHEN Zhao-wu~1,PEI Ming-jing~2 (1.Department of Modern Mechanics,University of Science and Technology,Heifei,230026, China) (2.School of Aeronautics,Northwestern Polytechnical University,Xian,710072,China)

【机构】 中国科学技术大学力学和机械工程系； 西北工业大学航天学院；

【摘要】 本文应用LS-DYNA3D动力学分析软件,通过数值模拟方法研究了变球缺型罩装药结构下高速杆式弹丸的形成过程,分析了其成型机理,得到弹体的速度分布规律,并研究了中心点起爆、四点同时起爆和环形起爆三种起爆方式对高速杆式侵彻体的成型和性能参数的影响。数值计算结果显示:变球缺型罩装药结构能形成速度高、长径比大、质量分布合理的高速杆式侵彻体;该类高速杆式弹丸的形成机理和聚能射流的形成机理相似;不同起爆方式下所形成的高速杆式侵彻体的形状和性能参数有所不同,其中环形起爆所形成的弹体性能参数最优。更多还原

【Abstract】 The software of the LS-DYNA3D was applied to simulate the formation process of the high velocity rod-shaped projectile from the modified hemispherical liner.Its formation mechanism was analyzed. The law of the velocity distribution of the penetrator was obtained.And then that the initiation methods such as center point initiation,four-point initiation and annular initiation had an effect on the formation and the performance parameters of the high velocity rod-shaped projectile was studied.The results of the numerical computation indicate that the shaped charge of the modified hemispherical liner can form the rod-shaped penetrator with high velocity,large slenderness and rational mass distribution.Its formation mechanism is similar to that of the shaped jet.There are some differences of the shape and performance parameters of the rod-shaped penetrators formed under the different initiation methods.The annular initiation is the best excellent initiation method.更多还原