摘要
为了研究起爆点位置对圆环形网栅切割式MEFP成型的影响,利用LS-DYNA动力有限元程序,采用流固耦合方法,对圆环形网栅切割式MEFP的形成过程进行了数值模拟。结果表明,该装药结构能形成5个具有一定质量和方向性、速度达到1600～2400 m.s-1的子EFP。在网栅距离固定的前提下,随着起爆点与药型罩顶点距离的增加,MEFP的速度逐渐增大,发散角逐渐减小。起爆点距离在0.56 Dk(Dk为装药口径)到0.89 Dk范围内能形成理想的子EFP,且在0.78 Dk时成型最好。
To study the influence of initiation point position on formation of circle-shaped multiple explosively formed projectile （MEFP）, numerical simulation of the forming process of the circle-shaped MEFP was carried out with the ALE method using LS-DYNA, and the influence of the cutting reseau distance on radial dispersion angle was analyzed. Results indicate that such a charge structure can produce five pieces of sub-explosively formed projectile which has a definite mass, direction, and a velocity between 1600 m· s-1 and 2 400 m · s-1. Under fixed cutting reseau distance, with the increase of initiation point distance, the speed of MEFP increases,the radial dispersion angle of MEFP reduces gradually. The initiation point distance should be in a proper range from 0.56 to 0.89 times as long as Dk（Dk is the charge caliber） in order to form ideal sub-explosively formed projectile, and it has a best formation at 0.78 Dk.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2012年第6期710-714,共5页
Chinese Journal of Energetic Materials
基金
国防基础科研项目(批准号:k133040610090)
关键词
爆炸力学
多爆炸成型弹丸
切割网栅
起爆点
数值模拟
explosive mechanics
multiple explosively formed projectile（MEFP）
cutting reseau
initiation point
numerical simulation
