温压炸药爆炸冲击波在坑道内的传播规律研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (5) : 23-29.

论文

耿振刚1，李秀地1, 2，苗朝阳1, 2，方浩1

作者信息 +

Propagation of blast wave of thermobaric explosive inside a tunnel

GENG Zhengang1,LI Xiudi1,2,MIAO Chaoyang1,2,FANG Hao1

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摘要

温压炸药爆炸冲击波对坑道内的人员和设备构成严重威胁。首先，在TNT爆炸试验数据验证的基础上，利用AUTODYN软件建立了炸药堵口爆炸的数值计算模型。其次，基于JWL-Miller能量释放模型计算原理，通过与TNT冲击波的对比，研究了某型温压炸药爆炸冲击波在坑道内的传播特性；通过与空旷地面爆炸冲击波的对比，研究了坑道对温压炸药爆炸冲击波的约束作用。研究结果表明：温压炸药具有更大的破坏威力，温压炸药的超压峰值和正相冲量平均为TNT的1.91倍和1.82倍，其超压和冲量等效TNT当量系数分别为1.94和2.21；坑道对温压炸药冲击波的约束作用明显，其超压峰值和正相冲量平均值分别为空旷地面上的13.55倍和15.21倍。

Abstract

Blast wave of thermobaric explosive is a serious threat to personnel and equipment inside a tunnel.Firstly,based on TNT blast test data verification,a numerical calculation model for an explosion entrance was established with the software AUTODYN.Secondly,the blast wave propagation characteristics inside a tunnel of thermobaric explosive whose state equation was described with JWL-Miller energy release model were studied through comparing with those of TNT blast wave.The constraint effect of a tunnel on the blast wave of thermobaric explosive was also investigated through comparing the propagation characteristics of thermobaric explosive side a tunnel with those on unconstrained ground.The results showed that thermobaric explosive has a greater destructive power; the average peak overpressure and positive phase impulse of thermobaric blast wave are1.91 times and 1.82 times of those of TNT,respectively; the equivalent coefficients of average overpressure and impulse of TNT for thermobaric explosive are1.94 and 2.21,respectively; the tunnel constrain effect on the blast wave of thermobaric explosive is obvious,the average peak overpressure and positive impulse of thermobaric shock wave in a tunnel are 13.55 times and 15.21 times of those on unconstrained ground.

导出引用

耿振刚1，李秀地1, 2，苗朝阳1, 2，方浩1. 温压炸药爆炸冲击波在坑道内的传播规律研究[J]. 振动与冲击, 2017, 36(5): 23-29

GENG Zhengang1,LI Xiudi1,2,MIAO Chaoyang1,2,FANG Hao1. Propagation of blast wave of thermobaric explosive inside a tunnel[J]. Journal of Vibration and Shock, 2017, 36(5): 23-29

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