| 引用本文: | 贾斌,马志涛,庞宝君.填充泡沫铝防护结构的超高速撞击数值模拟[J].哈尔滨工业大学学报,2011,43(1):16.DOI:10.11918/j.issn.0367-6234.2011.01.004 |
| JIA Bin,MA Zhi-tao,PANG Bao-jun.Numerical simulation investigation in hypervelocity impact on Al-foam stuffed shields[J].Journal of Harbin Institute of Technology,2011,43(1):16.DOI:10.11918/j.issn.0367-6234.2011.01.004 |
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| 摘要: |
| 模仿泡沫金属的生产原理建立了泡沫金属微结构几何模型,结合自编的光滑质点流体动力学程序进行了超高速撞击数值模拟,分别对6种形式的填充泡沫铝防护结构进行了仿真计算,比较了其撞击极限性能.结果表明当泡沫铝处于适当的位置时,填充泡沫铝结构的防护性能优于相同面密度的填充实心铝板结构.通过不同防护结构碎片云特性参数的对比分析表明,泡沫铝对小尺寸碎片的防护效果显著,其微结构能够使碎片云的法向动量有效分散,并通过多次加载使得碎片云液化、气化的比例大幅提升. |
| 关键词: 泡沫铝 防护结构 超高速撞击 SPH 空间碎片 |
| DOI：10.11918/j.issn.0367-6234.2011.01.004 |
| 分类号:O347 |
| 基金项目:中国空间技术研究院创新基金资助项目(CAST200723) |
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| Numerical simulation investigation in hypervelocity impact on Al-foam stuffed shields |
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JIA Bin1, MA Zhi-tao2, PANG Bao-jun1
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1.Dept. of Astronautics Engineering,Harbin Institute of Technology,150080 Harbin,China;2.School of Aerospace,Tsinghua University,100084 Beijing,China)
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| Abstract: |
| Aluminum foam is a new type of material for shield of spacecrafts which bears fine characteristics when subjected to hypervelocity impact of space debris. A microstructure model of geometry for metallic foams was set up based on their manufacturing process and hypervelocity impact numerical simulations were conducted by self-programmed Smooth Particle Hydrodynamics. Six types of Al-foam stuffed shields were calculated and their ballistic limits were compared with each other. The results indicated that shield performance of Al-foam stuffed shield was better than that of solid Al-plate stuffed shield with the same areal density if the Al-foam was stuffed at appropriate position. The analyses of characteristic parameters of debris cloud of different shields indicated that Al-foam had better shield performance on small-size debris. The microstructure of Al-foam could effectively spread the perpendicular momentum of debris cloud and significantly increase the proportion of material liquefaction and gasification in debris cloud through multi-shock. |
| Key words: Aluminum foam shield structure hypervelocity impact SPH space debris |
