为研究起爆方式、药型罩的高度和曲率半径对偏心亚半球装药形成射流的影响,利用LS-DYNA有限元分析软件对偏心亚半球装药结构射流形成过程进行数值模拟,分析了其成型过程.研究表明:对于偏心亚半球装药结构,端面环起爆形成的爆轰波形和药型罩外形匹配较好.药型罩的高度和口径比值H/A <0.2时,形成爆炸成形弹丸；H/A≥0.2时,形成杆式侵彻体.H/A值越大,弹体越细长,头尾速度差越大,有分裂成高速射流和低速杵体的趋势.曲率半径和口径比值R/A≥1.5时,形成的射流具有较好的外形和较高的速度.%In order to study the effect of initiation methods, heights and radius of liner on the formation of jet, LS -DYNA software was used to numerically simulate and analyze the formation process of jet in this paper. The research shows that, for the eccentric sub - hemisphere charge structure, it proved to be better when the shape of detonation wave under annular initiation matches the outside shape of the liner. The linear forms the explosively formed projectile, when the ratio between height and diameter (H/A) <0. 2. The linear forms the rod projectile, when the ratio H/A≥0. 2. The greater H/A value, the more slender the projectile body could be, and the greater the speed difference between the head jet and the tail jet comes to be. There is the trend that the linear forms the high - speed jet and the low speed slug. The formed jet has the good shape and high speed, when the ratio between radius and diameter (R/A) ≥1. 5.
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