含偏心起爆对EFP战斗部飞行特性的影响  

Effect of eccentric initiation on the flight characteristics and ballistic dispersion of EFP

作　　者：刘健峰[1,2] 龙源[1,2] 纪冲[1,2] 赵长啸[3] 姜楠[1] 

机构地区：[1]解放军理工大学野战工程学院,江苏南京210007 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [3]武汉军械士官学校,湖北武汉430075

出　　处：《爆炸与冲击》2015年第3期335-342,共8页Explosion and Shock Waves

基　　金：北京理工大学爆炸科学与技术国家重点实验室开放基金项目(KFJJ10-2M)

摘　　要：为研究起爆不对称性对EFP战斗部飞行特性的影响,对不同偏心量下60mm弧锥结合罩EFP战斗部进行飞行弹道实验。实验结果表明:偏心起爆条件下,当相对偏心量小于3.3%时,EFP在网靶穿孔接近圆形,弹丸飞行稳定;起爆相对偏心量达到6.7%时,弹丸飞行过程中摆动幅值增大,降低了对目标的打击精度和毁伤效果。利用LS-DYNA及CFX非线性动力学有限元程序对不同起爆偏心量下成型EFP的空气动力学特性进行数值模拟,描述了偏心起爆影响EFP成型对称性,改变弹丸在飞行过程中流场的分布特征,从而导致弹丸飞行过程中无规则运动的全过程。Flight trajectory experiments were conducted with60mm diameter EFP warhead in order to investigate the effect of eccentric initiation on the flight characteristics of EFP.The results indicate that the projectile flight stability with perforations nearly circular in the net target when eccentricity is less than 2mm.The accuracy of strike is lower and terminal effects are less harmful because the projectile overturns during the flight,with the eccentric value of 4mm.The forming of EFP and its flight characteristics with different eccentricity was numerically analyzed by using LS-DYNA and CFX.EFP is asymmetrical under the conditions of the eccentric initiation.It changes the symmetry of the flow field which leads to instability during flight.The research results provide a reference to detonation parameter of EFP warhead.

关 键 词：爆炸力学 非对称 空气动力 外弹道 偏心起爆 尾翼弹丸 

分 类 号：O383[理学—流体力学] TJ410.33[理学—力学]