中文摘要：

基于管-杆伸出式弹芯材料满足刚-塑性本构关系及该弹芯在侵彻过程中视为准定常运动等假设,通过分别对头部、管体、管与杆重合部及杆体等不同侵彻阶段的理论分析与推导,建立起该弹芯垂直侵彻半无限靶的简化模型。在1300 m/s~1500 m/s的速度范围内,对该弹芯进行了数值模拟与验证试验研究。通过对模型计算、数值模拟及试验结果之间的对比,表明简化模型及数值模拟方法的可靠性,得出了该弹芯垂直侵彻靶板所产生弹坑的形貌特征与形成机制,以及该弹芯在侵彻中的相对优势情况与侵彻深度随速度的变化规律。

英文摘要：

Based on the assumptions that the tube-rod extended penetrator materials can meet the rigid-plastic constitutive relations and a penetrator can be seen as quasi-steady movement in a penetration process, a simplified model for the telescopic penetrator of the normal penetration into a semi-infinite target is presented, through the respective theoretical analysis on the penetration stages of the head, the tube, the overlapped part of the tube and rod, and the rod. Tested experiments and numerical simulations on the extended penetrator were carried out at the speed between 1300 m/s to 1500 m/s. The comparison between theoretical results and the experimental as well as emulational results show that the simplified model and the simulation being adopted have good reliability. The morphology characteristics and the formation mechanism of the crater in the process of a normal penetration into a target, and the comparative advantage of this structure in a penetration and the law of change of the penetration depth increasing with speed are concluded.