| 引用本文: | 纪杨子燚,李向东,周兰伟,等.高速破片撞击充液容器形成液压水锤的试验研究.[J].国防科技大学学报,2019,41(3):70-76.[点击复制] |
| JI Yangziyi,LI Xiangdong,ZHOU Lanwei,et al.Experimental study on hydrodynamic ram generated by high velocity fragment impacting fluid-filled container[J].Journal of National University of Defense Technology,2019,41(3):70-76[点击复制] |
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| 高速破片撞击充液容器形成液压水锤的试验研究 |
| 纪杨子燚, 李向东, 周兰伟, 蓝肖颖 |
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(南京理工大学 机械工程学院， 江苏 南京 210094)
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| 摘要: |
| 为研究高速破片撞击充液容器形成的液压水锤效应，设计一套试验装置和测试方法，试验破片撞击充液容器产生空腔的变化过程、液体中不同位置处的压力变化以及前后面板的变形情况。试验发现：破片撞击容器后面板时会出现一圈空化气泡，气泡在后面板内表面从撞击点位置迅速沿径向扩展；液压水锤初始冲击阶段，距离撞击点较近区域在初始冲击波压力脉冲过后会出现一个较大负压，而距离撞击点较远区域不受负压影响；破片撞击速度对容器前面板最大变形影响较小，变形范围随着撞击速度的增大沿撞击点向四周扩展。后面板的最大变形及变形范围都随着破片撞击速度的增大而变大。 |
| 关键词: 液压水锤 充液容器 高速破片 空腔 |
| DOI：10.11887/j.cn.201903012 |
| 投稿日期：2018-03-23 |
| 基金项目:国家自然科学基金面上资助项目（11572159）；江苏省研究生科研与实践创新计划资助项目(KYCX19_0330) |
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| Experimental study on hydrodynamic ram generated by high velocity fragment impacting fluid-filled container |
| JI Yangziyi, LI Xiangdong, ZHOU Lanwei, LAN Xiaoying |
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(School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
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| Abstract: |
| In order to study the hydrodynamic ram generated by high velocity fragment impacting fluid-filled container, a set of experiment device and testing method was designed to record the evolution of the cavity inside the container, the pressure changes at different positions in the liquid and the deformation of the front and rear panels. Experimental results show that a circle of cavitation bubbles will appear when the fragments impact the rear panel of the container, and the bubbles rapidly expand radially from the point of impact on the inner surface of the rear panel. In the shock phase of the hydrodynamic ram, large negative pressure appears in the area close to the impact point after the initial shock wave pressure pulse, and the area away from the impact point is not affected by the negative pressure. The fragment impact velocity has little effect on the maximum deformation of the front panel and the deformation range expands along the impact point as the impact velocity increases. |
| Keywords: hydrodynamic ram fluid-filled container high-velocity fragment cavity |
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