超高速撞击丝网防护屏弹丸形状效应数值模拟研究

林敏;庞宝君;张凯

振动与冲击 ›› 2012, Vol. 31 ›› Issue (18) : 73-77.

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (18) : 73-77.
论文

超高速撞击丝网防护屏弹丸形状效应数值模拟研究

  • 林敏1,庞宝君1,张凯1
作者信息 +

Numerical Simulation of Projectile Shpe Effects under Hypervelocity Impact on Mesh Shield

  • LIN Min1, PANG Bao-Jun1,ZHANG Kai1
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文章历史 +

摘要

采用数值仿真方法研究不同形状弹丸撞击连续型防护屏和丝网防护屏后形成的碎片云特性。研究表明:相同面密度的多层丝网防护屏防护效果优于连续型防护屏;对于连续型防护屏,锥体撞击部位对后板毁伤的影响大于锥体长径比对后板毁伤的影响,而对于丝网防护屏影响规律则相反;研究长固锥锥尖撞击2种防护屏后碎片云动量密度,撞击连续型防护屏后,弹丸碎片云动量密度分布具有对称性,较之丝网防护屏分布更为集中,且动量密度峰值大于撞击丝网防护屏后弹丸碎片云动量密度峰值。

Abstract

The characteristics of debris cloud, which was generated by the various shapes of projectiles impacting on the continuous bumper and mesh shield, were investigated using the numerical simulation method. The study shows: the performance of the multilayer meshes shield is better than it of the continuous bumper with the same area density. The effect of tip or bottom of cone impact on the bumper is greater than the effect of the length-to-diameter ration for the continuous bumpers, but the result is reversed for the mesh shield. For the long cone, when the tip impacting the continuous bumper, the distribution of momentum density is symmetry, distribution range is more smaller, and the maximum of momentum density is greater than it of the projectile impacting the mesh shield.

关键词

弹丸形状 / 超高速撞击 / 数值仿真 / 丝网防护屏 / 碎片云

Key words

Projectile shape / Hypervelocity impact / Numerical simulation / Mesh shield / Debris cloud

引用本文

导出引用
林敏;庞宝君;张凯. 超高速撞击丝网防护屏弹丸形状效应数值模拟研究[J]. 振动与冲击, 2012, 31(18): 73-77
LIN Min;PANG Bao-Jun;ZHANG Kai. Numerical Simulation of Projectile Shpe Effects under Hypervelocity Impact on Mesh Shield[J]. Journal of Vibration and Shock, 2012, 31(18): 73-77

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