对矩形射孔弹射流的形成过程及其侵彻靶板的过程进行数值仿真研究,并采用将药型罩进行微元划分的方法,研究药型罩微元的运动规律以及射流的有效结构,获得了射流的头部速度、纵向速度分布、射流的临界侵彻速度等一系列评估射流威力特性的重要参数.结果表明:对于45号钢质靶板,在射流对靶板进行侵彻的过程中,张角为60°的药型罩产生的有效射流为速度超过550 m/s以上的药型罩微元所形成的射流段;有效射流的高速段(v≥1 300 m/s)由药型罩顶部材料组成,有效射流的中速段(1 000 m/s≤v ＜1 300 m/s)由药型罩的中部及中上部材料组成,沿药型罩母线方向靠近底部约0.2倍母线长度的材料不形成有效射流.%The liner shaped charge produced jet was studied.Key parameters to evaluate the performance of the jet,such as velocity distribution of material of liner,tip velocity of the jet and critical velocity were obtained.In addition,moving pattern and interaction of material sections of liner and the structural models of the jet was studied.Calculated result indicates that effective jet velocity of the liner shaped charge with small degree liner is over 550 m/s for steel target with general strength,the high speed section (v ≥ 1 300 m/s) of the effective jet is made up by the top of the cover,medium speed section (1 000 m/s ≤ v ＜ 1 300 m/s) are made up by the central and middle higher parts of the cover,20％ of the bottom of cover not taking part in forming the jet.
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