|
|||||
|
|
| 水下爆炸近场载荷的试验与数值模拟 | |
| 引用本文： | 安丰江,李旭,代利辉,张渝霞. 水下爆炸近场载荷的试验与数值模拟[J]. 北京理工大学学报, 2017, 37(S2): 91-94 |
| 作者姓名： | 安丰江 李旭 代利辉 张渝霞 |
| 作者单位： | 北京理工大学 机电学院, 北京 100081,北京理工大学 机电学院, 北京 100081,北京理工大学 机电学院, 北京 100081,北京理工大学 机电学院, 北京 100081 |
| 摘 要： | 借助于小药量水下爆炸试验及数值模拟研究了水下爆炸近场载荷及其运动特性。试验在爆炸水箱中进行，采用同时分幅扫描超高速光电系统拍摄炸药爆炸后视场600 mm×600 mm以内的冲击波及爆轰产物演化过程。使用LS-DYNA软件的ALE方法计算了水下爆炸近场冲击波、爆轰产物气体运动特性，以及冲击波峰值压力和爆轰产物气体与水介质边界压力变化特性，数值模拟结果与试验结果有很好的近似。在试验和数值模拟基础上，提出了适用于水下爆炸近场的冲击波运动、峰值压力的变化规律，并建立了爆轰产物气体初期膨胀运动规律及压力变化。 |
| 关 键 词： | 水下爆炸 爆炸载荷 ALE方法 |
| 收稿时间： | 2017-09-20 |
Experiments and Simulations on Explosion Loads of Close-Proximity Underwater Explosion |
|
| AN Feng-jiang,LI Xu,DAI li-hui and ZHANG Yu-xia. Experiments and Simulations on Explosion Loads of Close-Proximity Underwater Explosion[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2017, 37(S2): 91-94 | |
| Authors: | AN Feng-jiang LI Xu DAI li-hui ZHANG Yu-xia |
| Affiliation: | School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China,School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China,School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China and School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China |
| Abstract: | The shock wave and detonation gas of near field underwater explosion are investigated experimentally and numerically. A spherical TNT charge of radius 35mm is detonated in a 800 mm×800 mm water tank. The framing & scanning ultra-high-speed photography system is applied to obtain the trajectories of shock wave and detonation gas in its initial 80 microseconds. The arbitrary Lagrangian-Eulerian (ALE) method using LS-DYNA software is applied to simulate the processes of close-proximity underwater explosion for varied spherical charges. Comparisons with the experimental tests verify the results of numerical solutions. The engineering formulas of velocities and pressures for shock wave and detonation gas are proposed. |
| Keywords: | underwater explosion explosion load ALE method |
| 点击此处可从《北京理工大学学报》浏览原始摘要信息 | |
| 点击此处可从《北京理工大学学报》下载全文 | |