Numerical Simulation of Extended Penetrator with Attack Angle Penetration into Spaced Targets
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摘要: 利用LS-DYNA3D软件，对有攻角条件下伸出式侵彻体侵彻单层靶板及等厚度双层间隔靶板进行了数值模拟研究，从靶后动能和靶板破坏程度的角度对比了伸出体与同质量、同外径的基准杆侵彻单/双层靶板的能力。得出了侵彻体动能随时间变化的规律，分析了侵彻过程中攻角、速度及靶板分层3个重要因素对侵彻体侵彻能力的影响。结果表明：当攻角小或速度大时，伸出式侵彻体相对基准杆有较明显的优势；当双层靶板的间隔与基准杆长度相等时，靶板的分层对伸出体的侵彻性能几乎无影响，而对基准杆有较大影响，说明伸出体侵彻多层间隔防护结构的能力明显优于基准杆。Abstract: The extended penetrator penetrating single layer and two-layer spaced targets with attack angle were simulated with LS-DYNA3D, which were compared to that of the baseline rod with the same mass and outer radius. The variation of kinetic energy with time were obtained for extended penetrator and baseline rod respectively. It was demonstrated that the attack angle, velocity and target delamination have effects on the ability of extended penetrator penetrating targets. The advantage of extended penetrator is obvious at high velocity or little attack angle. When the space of the targets equals to the length of the baseline rod, the influence of the target delamination on the penetrating power of expended penetrator is weak, but the influence on the baseline rod is strong, which indicates that the ability of the extended penetrator penetrating two-layer spaced targets is stronger than that of baseline rod.
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Key words:
- mechanics of explosion /
- penetration /
- numerical simulation /
- extended penetrator /
- baseline rod /
- attack angle /
- spaced targets
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