Numerical Simulation of Anti-Penetration of Laminated Steel Plate by Hemispherical-Nosed Projectile Using SPH
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摘要: 随着高强度、高抗冲击特性钢结构在防护装甲、武器库防护门等军事领域得到广泛应用，钢结构的抗冲击性能成为研究的重点和热点。采用光滑粒子流体动力学方法（Smoothed Particle Hydrodynamics，SPH）对半球头弹撞击多层钢板的过程进行了数值模拟，并与实验对比，分析了半球头弹撞击后钢板的失效形式，得到了撞击点处钢板盘式隆起、蝶形破坏等过程，得到了钢板的von Mises应力分布以及半球头弹的剩余速度，验证了SPH方法在模拟钢板侵彻变形问题上的有效性。通过数值模拟，研究了钢体层数、钢体厚度对其抗侵彻特性的影响，研究表明：3 mm时单层钢板比多层钢板的防护能力强，9 mm时多层钢板比单层钢板的防护能力强，12 mm时多层钢板和单层钢板的防护能力相当。Abstract: With the wide application of high strength and high impact-resistant steel structures in armor protection of armor, arsenal protective doors and other military facilities, the impact-resistant properties of steel structures become a major focus and hot spot in defense research.In this paper, we simulated the process of hemispherical-nosed projectile penetration through a multilayer steel plate using smooth particle hydrodynamics, compared its results with those from experiment, and analyzed the failure form of the steel plate after being penetrated by hemispherical-nosed projectile, thereby obtaining the von Mises stress distribution and the residual velocity for the hemispherical-nosed projectile and verifying the effectiveness of SPH in the study of the steel plate penetration by a hemispherical-nosed projectile.We investigated the influence of the number of target plates and the thickness of the steel body on the target's penetration-resistant performance using numerical simulation.The results show that the protective strength of the single-layer steel plate is stronger than that of the multi-layer steel plate with a 3 mm thickness; that when the thickness is 9 mm, the multi-layer steel plate has a better protective capability than the single-layer steel plate; and that when the thickness is 12 mm, the multi-layer steel plate and the single-layer steel plate have similar protective strength.
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Key words:
- metal target plate /
- target structure /
- penetration /
- SPH
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图 3 半球形弹头侵彻3层金属靶板数值模拟
Figure 3. Numerical simulation of 3-layer plates impacted by hemispherical-nosed projectile
图 4 半球形弹头撞击靶板实验和数值模拟对比
Figure 4. Experiment and numerical simulation of plates impacted by hemispherical-nosed projectile
图 5 半球形弹头贯穿金属靶板后金属靶板中von Mises应力的分布
Figure 5. von Mises stress distribution in metal target after hemispherical-nosed projectile penetration
图 6 半球形弹头撞击6 mm单层靶板实验和数值模拟对比
Figure 6. Experiment and numerical simulation of 6 mm plates impacted by hemispherical-nosed projectile
图 7 6种工况下金属靶板被半球形弹头侵彻贯穿后的损伤
Figure 7. Damage in other 6 different target plates after impacted by hemispherical-nosed projectile
图 8 靶板厚度为3 mm时弹体速度变化趋势
Figure 8. Missile velocity variation trend for 3 mm target plate
图 9 靶板厚度为9 mm时弹体速度变化趋势
Figure 9. Missile velocity variation trend for 9 mm target plate
图 10 靶板厚度为12 mm时弹体速度变化趋势
Figure 10. Missile velocity variation trend for 12 mm target plate
表 1 Johnson-Cook本构模型参数
Table 1. Johnson-Cook constitutive model parameters
A/MPa B/MPa n C m Tm/K ${{\dot p}_0}$ /s-1 cV/(J·kg-1·K-1) T0/K r 300 426 0.34 0.015 1.0 775 1.0 875 300 0.1 
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表 2 6种不同工况的金属靶板尺寸表
Table 2. Six different conditions of metal target board sizes
Example Number of layers Total thickness/mm Body velocity/(m·s-1) 1 1 3 500 2 3 3 500 3 1 9 500 4 3 9 500 5 1 12 500 6 3 12 500
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