PELE弹丸靶后破片尺寸分布研究  

A study on fragmentation distribution of PELE

作　　者：樊自建[1,2] 冉宪文[2] 汤文辉[2] 黄秋生 

机构地区：[1]国防科技大学指挥军官基础教育学院,长沙410072 [2]国防科技大学理学院,长沙410073 [3]国营806厂,广东佛山528231

出　　处：《振动与冲击》2017年第20期72-77,90,共7页Journal of Vibration and Shock

基　　金：国家自然科研基金项目(11002162)

摘　　要：横向效应增强型弹丸(PELE)靶后毁伤效果与穿靶后形成的破片数量及大小密切相关。依据Mott-Grady破碎理论和PELE弹丸壳体膨胀过程假设,提出了弹丸壳体破片尺寸分布范围的理论分析方法,并通过实验回收弹体破片尺寸的统计分析,验证了理论分析方法的合理性。理论与实验研究表明,PELE弹丸壳体破片尺寸分布与壳体材料密度、破碎耗能、临界破碎应变、应变率等因素相关;破片的环向宽度和数量受内芯材料的影响较大,存在随着内芯材料的密度和弹性模量的增加前端破片环向宽度减小,数量增多,径向飞散速度变大的规律;但从实验结果看,外壳破片轴向长度则受内芯材料的影响较小,主要与弹靶碰撞速度相关。Target plate rear damage effect is closely related to the fragment's size and quantity which are produced by penetrator with enhanced lateral effect( PELE). In order to study the factors influencing the scale of projectile shell fragments and determine the fragment distribution scale,the expansion process of PELE projectile shell was analyzed,according to the Mott-Grady fragmentation theory. The theoretical analysis method of the distribution range of the fragment scale was given. The correctness of the theoretical analysis was tested by experiments. By theoretical analysis and experimental study,the results show that projectile shell fragment size distribution is mainly affected by material density,crushing energy consumption,critical fracture strain and strain rate. The fragments width and number are greatly influenced by inner core material. With the increasing of density and elastic modulus of the inner core material,the width of front-end fragment decreases the number,the radial velocity becomes large. The shell fragment length is determined by projectile impacting target speed and less affected by the inner core material.

关 键 词：PELE 横向效应增强 动态破碎理论 破片尺寸分布 

分 类 号：O383[理学—流体力学]