装满液体的容器在异型装药射流冲击下的损坏数值研究

Shixin Ma, Xiangdong Li
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摘要

在对装甲车辆脆弱性的研究中,高速穿甲弹对充液容器部件的影响是关键问题之一。本研究的目的是利用 ANSYS/LS-DYNA 中的结构任意拉格朗日-欧勒方法,研究充液容器在异型装药喷射冲击下的结构损伤。根据现有的实验数据对数值模型进行了验证。数值模型的验证工作表明,在径向冲击波和径向凹坑形成与时间的函数关系方面,模型与实验结果非常吻合。利用验证后的模型,分析了液体压力、能量传递以及过匹配对冲击过程的影响。结果表明,容器在异型装药射流冲击下的结构破坏模式包括穿孔和壁面变形。穿孔是由喷射尖端和尾部的穿透造成的,而壁面变形则是由流动液体的高速冲击造成的。在过匹配(OM)等于 1 的情况下,喷嘴对前后壁穿孔增量的贡献主要取决于冲击速度。在 OM 小于 1 的情况下,轧制均质装甲 (RHA) 装甲板的 "过滤效应 "导致尾部对前壁穿孔的贡献减小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical study on the damage of liquid-filled containers subjected to shaped charge jet impact
In the studies of the vulnerability of armored vehicles, the impact of high-velocity penetrators on liquid-filled container components is one of the critical concerns. The purpose of this study is to investigate the structural damage of the liquid-filled container subjected to shaped charge jet impact utilizing the Structural Arbitrary Lagrangian–Eulerian method in ANSYS/LS-DYNA. The numerical model is validated against available experimental data. The validation effort of the numerical model showed very good agreements with experiments in terms of radial shock wave and radial crater formation as a function of time. Using the validated model, the liquid pressure, the energy transfer as well as the influence of overmatch on the impact process were analyzed. The results indicate that the structural damage modes of containers under shaped charge jet impact include perforation and wall deformation. Perforation results from the penetration of the jet tip and tail, while wall deformation is caused by the high-velocity impact of the flowing liquid. In cases where the overmatch (OM) is equal to 1, the contribution of the tip to front and back wall perforation increment primarily depends on the impact velocity. In cases with OM less than 1, the “filtering effect” of the Rolled Homogeneous Armor (RHA) armor plate leads to the loss of the tail's contribution to front wall perforation.
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