| 波阻抗梯度材料超高速正/反撞击下防护特性研究 |
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| 引用本文： | 宋光明,李明,龚自正,武强,张庆明.波阻抗梯度材料超高速正/反撞击下防护特性研究[J].北京理工大学学报,2018,38(S2):67-70,80. |
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| 作者姓名： | 宋光明 李明 龚自正 武强 张庆明 |
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| 作者单位： | 北京卫星环境工程研究所, 北京 100094,中国空间技术研究院, 北京 100094,北京卫星环境工程研究所, 北京 100094,北京卫星环境工程研究所, 北京 100094,北京理工大学 机电学院, 北京 100081 |
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| 基金项目： | 国家安全重大基础研究计划（613311） |
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| 摘 要： | 为分析梯度分布对波阻抗梯度材料超高速撞击防护特性的影响，针对梯度分布为钛合金/铝合金/镁合金的波阻抗梯度材料，设计开展了以钛合金为撞击面（正撞击）、镁合金为撞击面（反撞击）的超高速撞击实验与数值模拟研究.研究获得了实验条件下防护结构碎片云特性及后墙损伤特性，并借助数值模拟，深入分析了不同撞击条件下弹靶冲击压力特性、内能转化特性.结果表明，正撞击有利于增大弹靶冲击压力，促进动能向内能的转化，从而提高防护能力.
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| 关 键 词： | 空间碎片 阻抗梯度材料 正/反撞击 超高速撞击 |
| 收稿时间： | 2018/12/1 0:00:00 |
Study on Performances of Graded-Impedance Materials under Front/Back Side Hypervelocity Impact |
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| SONG Guang-ming,LI Ming,GONG Zi-zheng,WU Qiang and ZHANG Qing-ming.Study on Performances of Graded-Impedance Materials under Front/Back Side Hypervelocity Impact[J].Journal of Beijing Institute of Technology(Natural Science Edition),2018,38(S2):67-70,80. |
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| Authors: | SONG Guang-ming LI Ming GONG Zi-zheng WU Qiang and ZHANG Qing-ming |
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| Institution: | Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China,China Academy of Space Technology, Beijing 100094, China,Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China,Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China and School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | In order to analyse the effect of gradient distribution on the performances of graded-impedance materials against hypervelocity impact, experiments and numerical simulations with titanium alloy as the impact face (front impact) and magnesium alloy as the impact face (back impact) were designed and carried out for the graded-impedance materials with graded-impedance distribution of titanium alloy/aluminium alloy/magnesium alloy. The characteristics of debris cloud and rear wall damage were obtained. The impact pressure and internal energy conversion characteristics of projectiles and targets under different conditions were analyzed. The results show that front impact is beneficial to increase the impact pressure, promote the transformation of kinetic energy to internal energy, and thus improve the protection ability. |
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| Keywords: | space debris graded-impedance materials front/back impact hypervelocity impact |
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