圆柱形爆炸容器内爆炸载荷的分布规律

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摘要为了分析圆柱形爆炸容器内爆炸载荷的分布规律，利用LS-DYNA软件对爆炸容器的内爆轰场进行了数值模拟研究，并探讨了圆筒高径比（H/D）、端盖短轴与长轴比（a/b）以及端盖形式对端盖处爆炸载荷的影响。结果表明，冲击波会在端盖壁面上形成二次冲击波和二次马赫反射波，使得端盖中心点的压力远大于爆心环面上的压力。随着H/D的增加，端盖中心点的超压峰值和比冲量会越来越大，当H/D=1.5时达到最大；随着a/b的增加，端盖对冲击波的汇聚效应更加明显，导致端盖中心的超压峰值和比冲量显著增大；对于平板封头的圆柱形爆炸容器而言，高径比H/D的增加有利于减小端盖处的反射超压和比冲量，但是拐角点会成为新的危险点。

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	徐景林1
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	顾文彬1
	刘建青1
	王振雄3
	陆鸣1
	徐博奥4

关键词 ：圆柱形爆炸容器, 端盖形状, 内爆载荷, 数值模拟, 马赫反射

Abstract：In order to analyze the distribution law ofblast loading in cylindrical explosive containment vessels, LS-DYNA was used to simulateexplosion progress in it. The influence of H/D、a/b and the end cap on the distribution of blast loading was discussed. The results show that the peak value and specific impulse of the shock wave in the numerical simulation agree well with the experimental results. A ‘secondary shock wave’ and a ‘second Mach reflection wave’ will appear on the wall surface of the cover, so that the pressure at the cover center point is larger than that on the cylinder center point. As H/D increases, thepeak pressure and impulse at the cover center point will become larger and larger, reaching the maximum when H/D=1.5. With the increasement of the a/b value, thepeak pressure and impulse at the cover center point will significantly increase. For the cylindrical explosive containment vessels of flat cover, with the increasement of H/D, the pressure and impulse at cover center point will decrease, but the corner points will become a new danger point.

Key words： cylindrical explosive containment vessel cover shape explosive pressure numerical simulation Mach reflection

收稿日期: 2019-03-13 出版日期: 2020-09-15

引用本文:

徐景林1,2，顾文彬1，刘建青1，王振雄3，陆鸣1，徐博奥4. 圆柱形爆炸容器内爆炸载荷的分布规律[J]. 振动与冲击, 2020, 39(18): 276-282.
XU Jinglin1，2,GU Wenbin1,LIU Jianqing1,WANG Zhenxiong3,LU Ming1,XU Boao4. Distribution of blast loading in cylindrical explosive containment vessels. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(18): 276-282.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I18/276

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