| 引用本文: | 汪庆桃,张庆明,吴克刚,等.超高速碰撞形成一次碎片云特性.[J].国防科技大学学报,2013,35(5):124-128.[点击复制] |
| WANG Qingtao,ZHANG Qingming,WU kegang,et al.Description of the first debris clouds formed by hypervelocity Impact[J].Journal of National University of Defense Technology,2013,35(5):124-128[点击复制] |
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| 超高速碰撞形成一次碎片云特性 |
| 汪庆桃1, 张庆明2, 吴克刚1, 李必红1 |
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(1.国防科技大学 指挥军官基础教育学院，湖南 长沙 410073;2.北京理工大学 爆炸科学与技术国家重点实验室，北京 100081)
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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、碎片云的形成及扩展过程进行数值模拟，其结果与实验结果进行比较，并验证了计算方法和模型参数的正确性。在此基础上采用数值模拟方法，对钨合金、轧制均质装甲及LY12铝三种材料的球形弹丸超高速撞击靶板之后形成的一次碎片云形貌及演化规律进行了研究，并基于量纲分析方法得出了碎片云特征参数（碎片云头部速度、径向最大膨胀速度及膨胀角）随初始撞击条件的变化规律。 |
| 关键词: 超高速碰撞 SPH方法 碎片云 演化规律 |
| DOI： |
| 投稿日期：2013-03-28 |
| 基金项目:国家部委资助项目（404030203） |
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| Description of the first debris clouds formed by hypervelocity Impact |
| WANG Qingtao1, ZHANG Qingming2, WU kegang1, LI Bihong1 |
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(1.College of Basic Education, National University of Defense Technology, Changsha 410073, China;2.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)
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| Abstract: |
| The hypervelocity impact studied in numerical simulation way was discussed. Damage mechanism, the process of the debris cloud forming and its expanding were simulated with the SPH method of ANSYS/AUTODYN code when spherical projectile hypervelocity impacts thin shield. Tungsten alloy, RHA(Rolled Homogeneous Armor) and aluminum material models and parameters were given, using the modeling methods, material models and parameters of the numerical simulation results in good agreement with the experimental results. The debris cloud parameters such as Vx,max,Vy,max and the half-angle of maximum radial extension(θ1) were obtained with numerical simulation, and the above parameters with the variation of the initial impact conditions were also studied. The empirical equations which relate these parameters to impact parameters, such as velocity, material parameters of projectile and target and plate thickness, were obtained based on dimensional analysis. |
| Keywords: hypervelocity impact SPH method debris cloud motion law |
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