应用LS-DYNA有限元软件对射流垂直侵彻饱含柴油液体密闭结构过程进行数值模拟。通过射流侵彻内腔直径30 mm、内腔高度30 mm、壁厚5 mm的饱含柴油液体密闭结构的脉冲X光摄影和剩余穿深实验，验证了数值计算方法。研究了不同结构尺寸时，饱含柴油液体密闭结构的抗射流侵彻能力。分析了密闭结构尺寸特性对射流稳定性以及射流侵彻密闭结构后的剩余侵彻能力的影响。结果表明，柴油液体径向汇聚严重干扰射流稳定性，容器内腔直径和高度影响受干扰射流的速度区间的长度及位置，容器壁厚影响柴油径向汇聚强度。
Abstract
The finite element code LS-DYNA was used to numerically simulate the process of shaped charge jet vertically penetrating diesel-filled airtight structural. The reliability of the simulation method was validated by X-ray and residual depth of penetration experiments of jet penetrating a 30mm lumen diameter, 30mm lumen height and 5mm wall thickness diesel-filled airtight structural at 0° dip angle. The penetration resistance of different dimensions with diesel-filled airtight structural was studied. The effects of dimensions of airtight container for stability of jet and the residual penetration ability when jet penetrates structural were analyzed. The results showed that radial imploding diesel will seriously interfere with the stability of jet. The vessel lumen diameter and height have an influence on length and position of interval of velocity for disturbed jet. The vessel wall thickness affects the intensity of radial imploding diesel.
关键词
冲击力学 /
密闭结构 /
有限元分析 /
射流 /
抗侵彻性能
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Key words
impact mechanics /
airtight structural /
finite element analysis /
shaped charge jet /
penetration resistance ability
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