球形弹丸超高速碰撞破碎特性

汪庆桃;吴克刚;李必红;陈志阳

振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 46-50.

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 46-50.
论文

球形弹丸超高速碰撞破碎特性

  • 汪庆桃,吴克刚,李必红,陈志阳
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Fragmentation Properties of the Spherical Projectiles Impacting at Hypervelocity

  • WANG Qing-tao, WU Ke-gang, LI Bi-hong,CHEN Zhi-yang
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摘要

对超高速碰撞数值模拟方法进行了讨论.采用ANSYS/AUTODYN程序的SPH方法,对球形弹丸超高速撞击时弹丸的破碎、碎片云的形成过程进行了数值模拟,其结果与实验结果进行了比较,并验证了计算方法和模型参数的正确性.在此基础上,研究了钨合金、轧制均质装甲(Rolled Homogeneous Armor,简称RHA)两种材料球形弹丸破碎的临界速度随(ts/dp)值(ts为靶板厚度,dp为弹丸直径)的变化规律,并给出了两种材料超高速碰撞时应变率和平均碎片尺寸随撞击速度的变化曲线以及碎片质量分布规律.

Abstract

The numerical simulation way studied hypervelocity impact has been discussed. Damage mechanism and the process of the debris cloud forming has been studied with the SPH method of ANSYS/AUTODYN code when spherical projectile hypervelocity impact thin shield. Tungsten alloy and RHA(Rolled Homogeneous Armor) material models and parameters have been given, using the methods, material models and parameters of the numerical simulation results in good agreement with the experimental results. fragmentation-initiation threshold velocity of the projectile, the average fragment size and the distributing of fragment size have been researched including its relation with the impacting velocities when the projectile hypervelocity impact the target.


关键词

超高速碰撞 / SPH方法 / 破碎临界速度 / 尺寸分布规律

Key words

hypervelocity impact / SPH method / Fragmentation-Initiation Threshold / size distribution law

引用本文

导出引用
汪庆桃;吴克刚;李必红;陈志阳. 球形弹丸超高速碰撞破碎特性[J]. 振动与冲击, 2014, 33(22): 46-50
WANG Qing-tao;WU Ke-gang;LI Bi-hong;CHEN Zhi-yang. Fragmentation Properties of the Spherical Projectiles Impacting at Hypervelocity[J]. Journal of Vibration and Shock, 2014, 33(22): 46-50

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