基于自由表面效应的弹丸斜侵彻理论研究

A STUDY ON THE OBLIQUE PENETRATION OF PROJECTILES BASED ON FREE-SURFACE EFFECTS

为解决空腔膨胀理论预报弹丸侧向响应偏差过大的问题 ,针对弹丸斜侵彻土壤混凝土等地质介质 ,发展了一种考虑靶自由表面效应的修正球形腔空腔膨胀理论 ,推导了各响应区的应力表达式 ,建立了相应的侵彻模型 .该模型在计算弹丸斜侵彻的轴向和侧向响应时与试验结果吻合较好 。

In order to resolve the problem that cavity expansion theory predicts the lateral response of the penetrator in error, an modified spherically symmetric cavity expansion model considering the effects of near surface was developed for projectiles' oblique penetrating geologic media. The radial stress distribution in various response fileds was deduced. The correlative penetration model was built. The calculation results with this model was in agreement with the experiment results for the axial and lateral response of projectiles' penetrating concrete soil target. The important basis was provided for the ammunition warhead design and fuze design.