﻿ 电磁轨道炮超高速弹丸侵彻靶板仿真研究
 舰船科学技术  2020, Vol. 42 Issue (1): 181-185 PDF

Simulation study on penetration into target of hypervelocity projectile in electromagnetic railgun
QIU Qun-xian, GAO Bo, LIU Ke-ke
The 713 Research Institute of CSIC, Zhengzhou 450015, China
Abstract: To solve the problem of hypervelocity projectile penetrating into target, models of hypervelocity projectile and target are built. Using Abaqus, Mie-Grüneisen state equation, Johnson-Cook hardening equation and Johnson-Cook failure criterion, simulation studies on penetration into target of tungsten alloy projectile are done, including same velocity but different angular speed and different velocity but same target and same velocity but different material target. Based on simulation results, the procedure of penetration are analyzed, and four conclusions are proposed.
Key words: electromagnetic railgun     hypervelocity projectile     penetration     numerical simulation
0 引　言

 图 1 美电磁轨道炮超高速弹丸及其穿透靶板试验照片 Fig. 1 US navy's hypervelocity projectile and pictures of projectile penetrating eight steel targets

1 超高速弹丸与靶板模型的建立

 图 2 超高速弹丸与靶板模型 Fig. 2 Models of Hypervelocity projectile and target
2 超高速弹丸与靶板材料的本构方程、状态方程与材料参数

3 超高速弹丸侵彻不同材料靶板的仿真结果 3.1 超高速弹丸侵彻不同材料靶板现象分析

 图 3 超高速弹丸（2 000 m/s初速）侵彻靶板仿真结果图 Fig. 3 The simulation results while projectile with 2 000 m/s penetrating continuously into target

 图 4 超高速弹丸（2 000 m/s初速、100 r/s）侵彻靶板仿真结果图 Fig. 4 The simulation results while projectile with 2 000 m/s and 100 r/s penetrating continuously into target

 图 5 超高速弹丸（2 000 m/s初速、1 000 r/s）侵彻靶板仿真结果图 Fig. 5 The simulation results while projectile with 2 000 m/s and 1 000 r/s penetrating continuously into target

 图 6 超高速弹丸（2 500 m/s初速）侵彻靶板仿真结果图 Fig. 6 The simulation results while projectile with 2 500 m/s penetrating continuously into target

 图 7 超高速弹丸（2 000 m/s初速）侵彻铝合金靶板仿真结果图 Fig. 7 The simulation results while projectile with 2 000 m/s penetrating continuously into al-alloy target
3.2 超高速弹丸侵彻不同材料靶板数值分析

 图 8 弹丸某节点的速度/应力与时间曲线图 Fig. 8 The Curves of velocity vs time and stress vs time of one node of projectile

4 结　语

1）同样速度侵彻同一靶板时，不论超高速弹丸是否旋转，弹丸穿透靶板侵彻损失的能量相当，弹丸存速相当，弹丸应力水平相当，靶板孔洞尺寸基本相当，弹丸旋转侵彻时，单元的扭转可能会带来弹丸速度的震荡；

2）不同速度侵彻同一靶板时，弹丸穿透靶板后的长度相当，绝对速度下降量相当，侵彻损失的能量相当，靶板孔洞尺寸基本相当，但初速大时穿透靶板所用的时间会缩短，因应变率强化效应而使弹丸应力提高；

3）同样速度侵彻不同材料、同种规格靶板时，弹丸穿透靶板的时间基本相当，但穿透强度较低材料靶板时弹丸的存速更大，损失的能量更少，形成的孔洞尺寸更大，合金钢靶板被穿透面会产生孔洞边缘“外翻”效应，而铝合金靶板表面则基本平整；

4）数值仿真可对认识超高速弹丸侵彻靶板问题提供研究手段。

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