Research of Damage Indexes of KE-Rod Penetration on Target
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摘要: 针对动能杆侵彻目标靶的毁伤评估问题，从有限元角度出发，在数值模拟的基础上，提出了单根动能杆的毁伤指数计算模型; 以不同杆体角(从-60°到90°以30°递增)和速度角(从0°到75°以15°递增)对靶板进行侵彻仿真，得到了多种情况下动能杆的毁伤指数和分布规律。一般情况下，毁伤指数随速度角的增加而增大，但当速度角为30°或60°时，速度角和杆体角一致时毁伤指数最大，并针对此种情况进行了分析。将动能杆垂直侵彻靶板的仿真结果与经验公式的计算结果进行了对比，二者相差4.06%，证实该仿真方法是可行的。Abstract: In allusion to the question of damage assessment for KE-Rod penetration on target, a single-impact damage index model was proposed based on numerical results of KE-Rod penetration on target with different rod-angles(varying from -60° to 90° by step of 30°) and velocity-angles (varying from 0° to 75° by step of 15°) using finite element method.Results show that the damage index increases with velocity-angle in general, but when the velocity-angel is 60° or 30°, the damage index reaches maximum while the rod-angel is the same.The result of simulation for vertical penetration is in good agreement with the experimental data, and the error is 4.06%, which validates the feasibility of the scheme.
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Key words:
- kinetic energy rod /
- target /
- penetration /
- damage index
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图 3 不同碰撞角度下的侵彻仿真结果(α=30°, v=1 800 m/s)
Figure 3. Simulation results of penetration with different collision angles (α=30°, v=1 800 m/s)
图 6 侵彻仿真结果(v=1 800 m/s，α=60°)
Figure 6. Simulation results of penetration(v=1 800 m/s, α=60°)
图 7 侵彻仿真结果(v=1 800 m/s，α=0°)
Figure 7. Simulation results of penetration(v=1 800 m/s, α=0°)
Material ρ/(g/cm3) A/(GPa) B/(GPa) n C m D1 D2 D3 D4 D5 93 W 17.6 1.506 0.177 0.12 0.016 1.00 0.16 3.13 -2.04 0.007 0.37 4340 steel 7.83 1.189 0.765 0.26 0.014 1.03 0.05 3.44 -212 0.002 0.61 
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