入射速度对长杆弹垂直侵彻行为的影响规律

Effect of Impact Velocity on the Penetration Behavior for Long-Rod Penetrator Vertically Penetrating Semi-Infinite Target

以长杆弹垂直侵彻半无限厚靶板为研究对象,分析了弹体最大侵彻深度与入射速度的关系,研究了弹体入射速度对侵彻最大深度的影响规律。研究表明:靶板的强度和界面效应使弹体在侵彻过程中存在一个临界速度,当入射速度大于临界速度时,弹体的侵彻才能通过开坑阶段进入准稳定阶段,它是造成当入射速度较小时侵彻深度随入射速度的提高而几乎不变或缓慢增加的主要原因;准稳定侵彻过程中弹体速度和侵彻速度基本不变,并且两者存在线性关系,这种关系只与弹体和靶板的材料性能有关,是造成当入射速度较大时侵彻深度随入射速度的提高呈快速线性增大的主要原因。

This study is aimed at the relation between maximal penetration depth and impact velocity for a long-rod penetrator vertically penetrating a semi-infinite target.The effects of impact velocity on the maximal penetration depth are obtained by numerical simulation.The results show that the threshold velocity exists in the process of penetrating due to the target strength and the interfacial effect,and the penetration enters into the quasi-steady stage from the dwelling stage only as the impact velocity of the penetrator is beyond this value,which is the key reason why the penetration depth does not change or increases extremely slowly with increasing impact velocity when the impact velocity is small compared with the threshold velocity.The penetrator velocity and penetrating velocity are close to a constant in the quasi-steady stage,and the positive linear relation between them is only related to the strength properties of the penetrator and the target,which is the main reason why the penetration depth linearly increases quickly with the impact velocity increasing when the impact velocity is beyond this threshold velocity.