大法线角下射流的跳弹效应

Ricochet Effect of Shaped Charge Jet under Large Normal Angle Condition

国内外对大法线角下的射流侵彻问题缺乏系统研究。为此,对比分析了Tate模型、Rosenberg模型和可压缩流体力学模型3种跳弹模型,并对大法线角下射流侵彻装甲钢和铝靶进行了实验研究。理论分析表明,可压缩流体力学模型能更准确地预测跳弹角。实验结果显示：大法线角下射流的侵彻深度随法线角的增大而减小,射流的垂直侵彻深度仅为正侵彻深度的10%左右;射流头部速度为6 800m/s时,603装甲钢的跳弹角在6°～7°之间,铝的跳弹角在5°～6°之间。

At present,there is a lack of systematic research on the shaped charge jet penetration under large normal angle condition, especially the special phenomenon of jet ricochet. Three ricochet models, including Tate model, Rosenberg model and compressible fluid-mechanics model, were comparatively analyzed, and the experiments of jet penetration into steel and aluminum targets were also conducted. Theoretical analysis shows that the compressible fluid-mechanics model is the best one to predict the rebounding angle. The experiment results indicate that under large normal angle condition,the pene- tration depth decreases with the increase of normal angle, and the vertical penetration depth is just about ten percents of that of normal penetration. When the velocity of shaped charge jet head is 6800 m/s,the ricochet angle is between 6° and 7° for 603 armor steel and between 5° and 6° for aluminum.