碎片云动量特性数值仿真研究

迟润强; 管公顺; 庞宝君; 张伟; 唐颀

doi:10.11858/gywlxb.2009.01.010

碎片云动量特性数值仿真研究

doi: 10.11858/gywlxb.2009.01.010

哈尔滨工业大学空间碎片高速撞击研究中心，黑龙江哈尔滨 150080

详细信息

通讯作者:
迟润强

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出版历程
- 收稿日期: 2008-04-15
- 修回日期: 2008-07-10
- 发布日期: 2009-02-15

Models for Momentum of Debris Cloud and Ejecta Produced by Hypervelocity Impacts of Aluminum Spheres with Thin Aluminum Sheets

Hypervelocity Impact Research Center, Harbin Institute of Technology, Harbin 150080, China

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Corresponding author: CHI Run-Qiang

摘要

摘要: 铝合金球形弹丸高速撞击薄铝板时，会造成薄铝板穿孔并自身发生破碎，在铝板前后两侧产生碎片云，分别为反溅碎片云和穿透碎片云。反溅碎片云及穿透碎片云具有各自的动量特性，对其动量特性的研究有助于为碎片云理论建模提供依据。采用AUTODYN V6.0软件对直径为6.35 mm的Al 1100-O球形弹丸高速正撞击6种厚度的Al 6061-T6薄板进行了数值仿真计算，撞击速度为1.0～5.0 km/s。得到上述两种碎片云的动量，确定了动量值随撞击速度v及薄板厚度的变化规律。同时，利用仿真得到的动量数据，采用多元回归方法，分别建立了两种碎片云动量模型。最后，对美国国家航空航天局（NASA）报告给出的7种工况下的撞击实验进行了数值仿真计算，并将动量值与实验结果进行了比较，得到的比较结果可用以分析数值仿真的有效性。
- 动量 /
- 碎片云 /
- 超高速撞击 /
- 数值仿真 /
- 空间碎片 /
- 破碎
Abstract: Debris clouds produced by the normal impact of an aluminum alloy sphere with an aluminum alloy sheet can scatter flying downrange, as well as an ejecta veil is produced at the same time. The momentum of debris clouds and ejecta are necessary to create the debris clouds and ejecta theoretical models. 54 numerical simulations were performed using the SPH (smoothed particle hydrodynamics) technique in AUTODYN-2D, in which 6.35 mm diameter of 1100-O aluminum spheres impacted six thicknesses of 6061-T6 aluminum sheets at velocities ranging from 1.0 km/s to 5.0 km/s. Using the data from the numerical simulations, two respective regression models are developed for characterizing the momentum of debris clouds and ejecta produced by impacts with 1.0 km/sv5.0 km/s, 0.5 mm3.0 mm. In the two models, the independent variables are the impact velocity, v, and the thickness of the sphere, t, while the dependent variables are the momentum ratios (ratios of debris clouds momentum and ejecta momentum to sphere momentum). The effects of v and on the momentum of debris clouds and ejecta are investigated. Seven additional numerical simulations in the same way as above were carried out and values obtained are compared with the experimental data of NASA to evaluate the performance of the simulation.
- momentum /
- debris clouds /
- hypervelocity impact /
- numerical simulation /
- space debris /
- fragmentation

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参考文献(17)

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