基于ANSYS/LS-DYNA数值模拟计算对弧锥结合药型罩的优化设计

Optimization of Arc-cone Liner Based on ANSYS/LS-DYNA Numerical Simulations

为研究弧锥结合药型罩形成爆炸成型弹丸过程中,药型罩圆弧-锥角部分对爆炸成型弹丸性能的影响,控制其他变量保持不变,取圆弧-锥角在药型罩母线长度所占比例分别为1/7、2/6、3/5、4/4、5/3、6/2、7/1,采用数值模拟软件ANSYS/LS-DYNA建立数值模型进行模拟计算,得到相应数值模拟结果,最后通过试验验证数值模拟结果,分析了不同比例圆弧-锥角药型罩形成爆炸成型弹丸数值模拟结果中的速度、长度、压实状况等参数。结果表明,爆炸成型弹丸的速度随圆弧-锥角比例的增大而逐渐减小并在比例为3/5后保持稳定;弹丸断裂时间随圆弧-锥角比例的增大而减小;圆弧-锥角比例为3/5~5/3之间弹丸均断裂为3个部分,6/2比例从中间断裂,3/5至7/1比例中,变化不明显;综合比较速度、断裂时间、断裂部分数等参数,圆弧-锥角比例为5/3速度最大为2123 m/s、断裂数量最少为3、压实程度良好,飞行性能和侵彻能力等综合性能更好。通过试验测量弹丸速度,与数值模拟结果误差在5%左右,充分证实研究结果的可靠性。

In order to study the effect of arc-cone part of the liner on the performance of explosive shaped projectiles,numerical simulations by ANSYS/LS_DYNA was conducted to calculate concentrated charge model of the ratio of arc-cone angle to the slant height of the liner are 1/7,2/6,3/5,4/4,5/3,6/2,7/1,while controlling other variables to remain the same.A numerical model was established using the simulation software ANSYS/LS-DYNA,and simulations were performed to obtain the corresponding results.The numerical simulation results were then validated through experiments,analyzing parameters such as velocity,length,and compaction of explosion shaped projectiles formed with different arc-cone angle ratios.The results indicate that the velocity of the explosion shaped projectiles decreases gradually with increasing arc-cone angle ratio,stabilizing after the ratio of 3/5.The fracture time of the projectiles also decreases as the arc-cone ratio increases.For ratios between 3/5 and 5/3,the projectiles typically fractured into three parts,while those at the ratio of 6/2 fractured from the middle;the variations among ratios from 3/5 to 7/1 were not significant.By comprehensively comparing parameters such as speed,fracture time,and number of fracture parts,it was found that at the arc-cone ratio of 5/3,the projectile achieved a maximum speed of 2123 m/s,with the least number of fractures(3 pieces)and a good level of compaction,resulting in superior overall flight performance and penetration capability.The experimental measurements of the projectile′s speed showed a deviation of around 5%from the numerical simulation results,sufficiently validating the reliability of the research findings.