典型靶后破片对明胶毁伤的数值模拟

摘要

The numerical simulations of 4.8mm sphere fragment penetrating gelatin target with Lagrange algorithm are carried out, using the ANSYS/LS-DYNA software in this paper. The simulation results are compared with experimental results, and the maximum cavity diameters and penetration depth of simulations are consistent well with experimental results, so the correctness and validity of numerical simulation are validated. The effect of shape, mass and velocity of fragment from shaped charge penetrating armor target on the maximum cavity diameter and penetration depth of the gelatin target are analyzed. Regarding the maximum cavity diameter and penetration depth as index on this basis, orthogonal design method is applied to analyze the primary and secondary relations on the index of the three factors. The analysis results indicate that the major factor is the mass of fragment.%借助ANSYS/LS-DYNA软件，采用Lagrange算法对4.8mm球形破片侵彻明胶靶标进行了数值模拟研究，将计算结果同相应的试验结果进行了比较，二者符合得很好，验证了数值模拟方法的正确性及有效性。在此基础上分析了聚能装药侵彻装甲靶板靶后破片形状、破片质量、破片速度对明胶靶标最大瞬时空腔直径和侵彻深度的影响规律，并以明胶靶标最大瞬时空腔直径和侵彻深度为指标，应用正交设计方法分析了破片形状、破片质量、破片速度3因素对指标的影响主次关系。研究表明：破片质量是影响明胶靶标最大瞬时空腔直径及侵彻深度的主要因素。