饱含柴油密闭结构抗射流侵彻性能分析

Anti-penetration performance analysis of diesel oil filled airtight structures against shaped charge jet

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。

The finite element code LS-DYNA was used to numerically simulate the process of shaped charge jet vertically penetrating a diesel oil filled airtight structure. The reliability of the simulation method was validated by X-ray photographies and residual depth penetration experiments of a jet penetrating a 30 mm lumen diameter,30 mm lumen height and 5 mm wall thickness diesel oil filled airtight structure at 0° dip angle. The penetration resistance of diesel oil filled airtight structures with different dimensions was studied. The effects of dimensions of airtight container on the stability of jet and the residual penetration ability when the jet penetrates the structure were analyzed. The results show that the radial imploding of diesel oil will seriously disturb the stability of jet. The vessel lumen diameter and height have influence on the length and position of velocity interval of the disturbed jet. The vessel wall thickness affects the intensity of the radial imploding of diesel oil.