Numerical Simulation on a Novel Dynamic Pressure Desensitization Device for Emulsion Explosives
-
摘要: 利用LS-DYNA动力学有限元软件，对新型乳化炸药动压减敏装置的作用过程进行了三维数值模拟，研究了该装置在水下爆炸过程中的流场分布特征，及其结构设计对实验结果的影响。对比研究结果表明，新型乳化炸药动压减敏装置中, 受压乳化炸药之间的排距是影响实验精度的关键因素，当乳化炸药的半径为2cm、主发药RDX的质量为10g时，乳化炸药的最小排距(即前排乳化炸药对后排乳化炸药影响最小时的排距)为20cm。因此，在乳化炸药动态减敏实验开展之前，可以通过数值模拟的手段预先确定最小排距，减小实验误差。该方法可为乳化炸药动压减敏的后续深入研究提供参考。Abstract: By using the dynamic finite element software LS-DYNA, we simulated the working process of a novel emulsion explosive pressure desensitization device, and investigated the characteristics of its flow field distribution and the influence of its structural design on the experimental results.The comparison of simulation and experiment results shows that the row spacing is the critical factor that determines the degree of accuracy in experiment.For the novel dynamic pressure desensitization equipment, when the radius of the emulsion explosive is 2cm and the weight of RDX is 10g, the smallest row spacing, which minimizes the effect of the emulsion explosive in the front row on that in the back row, is determined as 20cm.Therefore, in order to decrease the experiment error, we can decide on the smallest row spacing through numerical simulation before the dynamic desensitization experiments take place.Our work can serve as a reference for the further research.
-
图 1 传统的冲击波动压减敏实验原理图
Figure 1. Schematic of traditional dynamicpressure desensitization experiment
图 2 改进后的冲击波动压减敏实验原理图
Figure 2. Schematic of improved dynamicpressure desensitization experiment
图 4 不同时刻(t)新型动压减敏装置的流场分布特征图
Figure 4. Flow field distribution of new dynamic pressure desensitization device at different time
图 5 若干临界位置处冲击波压力时程曲线与无阻挡情况的比较
Figure 5. Comparison of shock wave pressure-history at several critical positions with unblocked condition
图 6 乳化炸药后不同位置处冲击波的压力时程曲线与无阻挡情况的比较
Figure 6. Comparison of shock wave pressure-history at several positions behind the emulsion explosive with unblocked condition
表 1 水的Mie-Grüneisen状态方程参数
Table 1. State parameters of Mie-Grüneisen equation for water
C/(m/s) S1 S2 S3 γ0 a 1480 1.92 0 0 0.35 0 
下载: 导出CSV
表 2 乳化炸药的阻挡对若干临界位置处冲击波压力的影响
Table 2. The influence of emulsion explosive on the shock wave at several critical positions
Spacing from theRDX/(cm) Peak pressure/(MPa) Influencing degree/(%) With a block Without a block 24 77.6 77.6 0 26 44.1 47.5 7.2 50 23.1 23.2 0.4
下载: 导出CSV
表 3 前排乳化炸药的阻挡对其后不同位置处冲击波压力的影响
Table 3. The influence of emulsion explosive of front row on the shock wave at different following positions
Spacing from emulsion explosiveof the 1st row/(cm) Peak pressure/(MPa) Influencing degree/(%) With a block Without a block 10 35.5 36.5 2.7 15 31.6 31.8 0.6 20 27.0 27.1 0.4 25 23.1 23.2 0.4
下载: 导出CSV
-
[1] 王尹军, 吕庆山, 汪旭光.冲击波对含水炸药减敏作用的实验研究[J].爆炸与冲击, 2004, 24(6):558-562. doi: 10.3321/j.issn:1001-1455.2004.06.015WANG Y J, LV Q S, WANG X G.Experimental study on the desensitization of water-bearing explosives subjected to shock wave[J].Explosion and Shock Waves, 2004, 24(6):558-562. doi: 10.3321/j.issn:1001-1455.2004.06.015 [2] 颜事龙, 陈东梁.不同敏化气泡载体敏化的乳化炸药减敏压力研究[J].兵工学报, 2006, 27(5):887-890. doi: 10.3321/j.issn:1000-1093.2006.05.026YAN S L, CHEN D L.Research on the desensitization pressure of emulsion explosives sensitized by different sensitizing bubble carriers[J].Acta Armamentarii, 2006, 27(5):887-890. doi: 10.3321/j.issn:1000-1093.2006.05.026 [3] 颜事龙, 张少波, 刘义.煤矿许用乳化炸药动态压力下减敏的研究[J].安徽理工大学学报(自然科学版), 2003, 23(3):27-31. doi: 10.3969/j.issn.1672-1098.2003.03.006YAN S L, ZHANG S B, LIU Y.Study on the desensitization of the coal mine permitted emulsion explosives under dynamic pressure[J].Journal of Anhui University of Science and Technology (Natural Science), 2003, 23(3):27-31. doi: 10.3969/j.issn.1672-1098.2003.03.006 [4] 吴红波, 颜事龙, 刘锋.动压作用下乳化剂含量对乳化炸药破乳程度的影响[J].火工品, 2011(2):47-50. doi: 10.3969/j.issn.1003-1480.2011.02.013WU H B, YAN S L, LIU F.Influence of emulsifier content on demuisification degree of emulsion explosive under dynamic pressure[J].Initiators&Pyrotechnics, 2011(2):47-50. doi: 10.3969/j.issn.1003-1480.2011.02.013 [5] NIE S.Pressure desensitization of a gassed emulsion explosive in comparison with micro-balloon sensitized emulsion explosives[C]//Proceedings of Thirteen Annual Symposium on Explosives and Blasting Research.Las Vegas, Nevada, USA: International Society of Explosives Engineers, 1997: 2-5. [6] 陈东梁, 颜事龙, 薛里.动态压力作用下乳化炸药减敏的实验研究[J].安徽理工大学学报(自然科学版), 2004, 24(增刊1):88-92. http://d.old.wanfangdata.com.cn/Periodical/hngyxyxb2004z1021CHEN D L, YAN S L, XUE L.Experimental study on the desensitization of emulsion explosives under dynamic pressure[J].Journal of Anhui University of Science and Technology (Natural Science), 2004, 24(Suppl 1):88-92. http://d.old.wanfangdata.com.cn/Periodical/hngyxyxb2004z1021 [7] CHENG Y F, MA H H, LIU R, et al.Explosion power and pressure desensitization resisting property of emulsion explosives sensitized by MgH2[J].J Energ Mater, 2014, 32(3):207-218. doi: 10.1080/07370652.2013.818078 [8] CHENG Y F, MA H H, SHEN Z W.Pressure desensitization influential factors and mechanism of magnesium hydride sensitized emulsion explosives[J].Propell Explos Pyrot, 2014, 39:267-274. doi: 10.1002/prep.201300084 [9] 程扬帆, 马宏昊, 沈兆武.MgH2对乳化炸药压力减敏影响的实验研究[J].爆炸与冲击, 2014, 34(4):427-432. http://cdmd.cnki.com.cn/Article/CDMD-10358-1014432195.htmCHENG Y F, MA H H, SHEN Z W.Experimental research on the pressure desensitization of emulsion explosives sensitized by MgH2[J].Explosion and Shock Waves, 2014, 34(4):427-432. http://cdmd.cnki.com.cn/Article/CDMD-10358-1014432195.htm [10] 程扬帆, 刘蓉, 马宏昊, 等.新型敏化气泡载体对乳化炸药爆炸威力及减敏性的影响[J].煤炭学报, 2014, 39(7):1309-1314. http://d.old.wanfangdata.com.cn/Periodical/mtxb201407018CHENG Y F, LIU R, MA H H, et al.Effects of new type of chemical bubbles carriers on emulsion explosive explosion power and anti-pressure ability[J].Journal of China Coal Society, 2014, 39(7):1309-1314. http://d.old.wanfangdata.com.cn/Periodical/mtxb201407018 [11] 宋锦泉.乳化炸药爆轰特性研究[D].北京: 北京科技大学, 2000: 130-131.SONG J Q.Research on detonation characteristics of emulsion explosives[D].Beijing: University of Science and Technology Beijing, 2000: 130-131. [12] 林谋金, 马宏昊, 沈兆武, 等.铝薄膜含量对RDX基铝薄膜炸药水下爆炸性能影响[J].含能材料, 2014, 22(5):678-683. http://d.old.wanfangdata.com.cn/Periodical/hncl201405021LIN M J, MA H H, SHEN Z W, et al.Effect of aluminum film content on underwater explosion performance of RDX-based aluminum film explosive[J].Chinese Journal of Energetic Materials, 2014, 22(5):678-683. http://d.old.wanfangdata.com.cn/Periodical/hncl201405021 -
下载:
点击查看大图
计量
- 文章访问数: 6733
- HTML全文浏览量: 2507
- PDF下载量: 88
