0 引言
1 试验研究
1.1 试验描述
1.2 试验结果及分析
图4 伴随侵彻第二层靶后示意图Fig.4 Schematic diagram of the second layer of target with accompanying penetration |
表1 试验结果Table 1 Test results |
| test | Initial angle to the horizontal plane | Initial velocity | Angle after penetrating layer 1 target | Angle after penetrating layer 2 target | Speed after penetrating layer 1 target | Speed after penetrating layer 2 target | Speed after penetrating layer 3 target |
|---|---|---|---|---|---|---|---|
| Individual | 0° | 801m/s | -0.13° | -0.32° | 788m/s | 780m/s | 771m/s |
| Accompanying | 0° | 800m/s | -2.92° | -5.12° | 792m/s | 786m/s | 777m/s |
2 数值仿真研究
2.1 仿真模型及工况
表2 J-C模型参数[22]Table 2 J-C model parameters |
| parameter | numeric value | parameter | numeric value |
|---|---|---|---|
| ρ/(g·cm-3) | 7.8 | B | 0.005 |
| G/GPa | 78 | n | 0.53 |
| E/GPa | 205 | C | 0.014 |
| A | 0.0076 | m | 1.13 |
表3 HJC模型参数[23]Table 3 HJC model parameters |
| parameter | numeric value | parameter | numeric value |
|---|---|---|---|
| ρ(g·cm-3) | 2.44 | D1 | 0.04 |
| G/GPa | 14.86 | D2 | 1.0 |
| A | 0.79 | K1/GPa | 85 |
| B | 1.6 | K2/GPa | -171 |
| C | 0.007 | K3/GPa | 208 |
| N | 0.61 | FS | 0.38 |
表4 仿真计算工况Table 4 Simulated operating conditions |
| Operating conditions | Initial angle | Accompanying body position | Distance |
|---|---|---|---|
| 1 | 0° | Individual | |
| 2 | 0° | above | 3x bullet diameter |
| 3 | 0° | above | 4x the bullet diameter |
| 4 | 0° | above | 5x the bullet diameter |
| 5 | 0° | below | 3x bullet diameter |
| 6 | 0° | below | 4x the bullet diameter |
| 7 | 0° | below | 5x the bullet diameter |
| 8 | -2° | above | 3x bullet diameter |
| 9 | -2° | above | 4x the bullet diameter |
| 10 | -2° | above | 5x the bullet diameter |
| 11 | -2° | below | 3x bullet diameter |
| 12 | -2° | below | 4x the bullet diameter |
| 13 | -2° | below | 5x the bullet diameter |
| 14 | -2° | Individual | |
| 15 | 2° | Individual | |
| 6 | 2° | above | 3x bullet diameter |
| 17 | 2° | below | 3x bullet diameter |