反跑道动能弹斜侵彻机场多层跑道的三维数值模拟

应用LS-DYNA有限元仿真软件对反跑道动能侵彻弹斜侵彻机场跑道的过程进行了三维数值模拟。研究了侵彻速度、入射斜角、侵彻弹重心位置以及跑道内介质交界面对侵彻过程的影响。结果表明：侵彻弹弹体质心位置靠前能减少侵彻中弹体的翻转，增加侵彻深度；多层介质界面的存在加速了弹体姿态翻转，侵彻速度越小和斜角越大时其现象越明显，同时改变了弹体过载响应，加剧了侵彻弹壳体应力集中。仿真结果对反跑道动能侵彻弹设计具有参考价值。

3D Numerical Simulation of Oblique Penetration of Antirunway Penetrator to a Multilayer Runway Target

The process of penetrating obliquely a multilayer runway with antirunway KE penetrator was numerically simulated by the finite element code LS-DYNA3D.The influences of the penetration velocity,angle,centroid of projectile and medium interface in the runway on penetration process were studied.The result indicates that the overturned angle of projectile could be reduced and the penetration depth increases when the centroid of projectile is moved ahead;the existence of multilayer medium interface accelerates overturn,which is obvious at smaller penetration velocity and larger incidence oblique angle,changes overload response and aggravates stress concentration for the penetrator.The simulated results have reference value for the design of the penetrator.