爆炸冲击波在不同断面竖井中的传播规律研究
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摘要
为探明爆炸冲击波在竖井内的传播规律,利用ANSYS/LS-DYNA动力分析软件,对4.8kg乳化炸药在竖井内的爆炸过程进行数值模拟,分析了冲击波在长宽比相同、断面大小不同的3个竖井内轴向与径向的传播规律。结果表明:在竖井轴向,爆心距大于6 m后,不同断面的竖井衰减速度不同,小、中、大竖井每2 m平均衰减率分别为25.02%、26.29%、32.32%;在竖井径向,冲击波由球面波转别为平面波的速度随着断面的增大而加快。
In order to find out the propagation laws of explosive shock wave in shaft, the explosion process of 4.8 kg emulsion explosive in shaft was simulated by ANSYS/LS-DYNA software. The axial and radial propagation laws of shock wave in three shafts with the same aspect ratio and different section sizes were analyzed. The results show that the attenuation rates of the shafts with different sections are different when the detonation centers of the shaft in axial direction is greater than 6 m, and the average attenuation rate of each shaft per 2 m is 25.02%, 26.29% and 32.32%. In the radial direction of the shaft, the velocity of the shock wave from spherical wave to plane wave increases with the increase of the section.
In order to find out the propagation laws of explosive shock wave in shaft, the explosion process of 4.8 kg emulsion explosive in shaft was simulated by ANSYS/LS-DYNA software. The axial and radial propagation laws of shock wave in three shafts with the same aspect ratio and different section sizes were analyzed. The results show that the attenuation rates of the shafts with different sections are different when the detonation centers of the shaft in axial direction is greater than 6 m, and the average attenuation rate of each shaft per 2 m is 25.02%, 26.29% and 32.32%. In the radial direction of the shaft, the velocity of the shock wave from spherical wave to plane wave increases with the increase of the section.
引文
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[2]杨科之,杨秀敏.坑道内化爆冲击波的传播规律[J].爆炸与冲击,2003(1):37-40.
[3]宋娟,李术才,张敦福,等.地下空间爆炸冲击波传播规律研究[J].地下空间与工程学报,2016,12(2):560.
[4]孔德森,孟庆辉,史明臣,等.爆炸冲击波在地铁隧道内的传播规律研究[J].地下空间与工程学报,2012,8(1):48-55.
[5]曲树盛,李忠献.内爆炸作用下地铁车站结构的动力响应与破坏分析[J].天津大学学报,2012,45(4):285-291.
[6]李秀地,郑颖人,李列胜,等.长坑道中化爆冲击波压力传播规律的数值模拟[J].爆破器材,2005(5):5-8.
[7]李秀地,郑颖人,郑云木,等.坑道内冲击波冲量传播规律的试验研究[J].爆破器材,2007(3):4-7.
[8]石少卿,唐建功,汪敏,等.ANSYS/LS-DYNA在爆炸与冲击领域内的工程应用[M].北京:中国建筑工业出版社,2011.
[9]柏小娜,李向东,杨亚东.封闭空间内爆炸冲击波超压计算模型及分布特性研究[J].爆破器材,2015,44(3):22-26.
[10]梁东升.基于LS-DYNA模拟的巷道爆破空气冲击波传播特性研究[D].昆明:昆明理工大学,2016.