Attenuation Characteristics and Mechanism of Explosion Shock Wave Generated by Thermobaric Explosive in L-shaped and Gallery Tunnels

被引：0
|
作者：
Ji Y. [1 ,2 ]
Zhang G. [1 ]
Li G. [2 ]
Deng S. [1 ]
Xu T. [2 ]
Yao J. [1 ]
Li J. [2 ]
Wang M. [1 ,2 ]
He Y. [1 ]
机构：
[1] School of Mechanical Engineering, Nanjing University of Science and Technology, Jiangsu, Nanjing
[2] State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Jiangsu, Nanjing
来源：
Binggong Xuebao/Acta Armamentarii | 2023年 / 44卷
关键词：
attenuation ability to shock wave; evolution of waveform; gallery tunnel; L-shaped tunnel; TBX;
D O I：
10.12382/bgxb.2023.0745
中图分类号：
学科分类号：
摘要：
The explosion tests of thermobaric explosive (TBX) in L-shaped and gallery tunnels were carried out on a self-established large-scale tunnel platform. According to the shock wave overpressure, positive pressure duration and specific impulse acquired from the tests, the propagation laws of shock wave in the two kinds of tunnel are studied, and the influence of tunnel shape on the waveform evolution and attenuation ability, and the forming mechanism of attenuation difference to the shock wave are analyzed. The results indicate that, in the L-shaped and gallery tunnels, the shock wave generates multiple interactions with wall surfaces to form the multi-waveforms with multi-peaks after entering the main tunnel through branch tunnels. The specific impulse in L-shaped tunnel is not significantly different from that in long straight tunnel, and the reduction coefficients of the overpressure of air explosion at and in tunnel entrance are 1 and 1. 2, respectively. Compared to the long straight tunnel, the gallery tunnel has a significant attenuation effect on the shock wave, and the coefficients of overpressure and specific impulse at turning are both about 0. 6. The difference in shock wave attenuation effect between L-shaped and gallery tunnels comes from the difference in propagation paths of shock waves after reaching the connected positions of the main and branch tunnels. © 2023 China Ordnance Industry Corporation. All rights reserved.
引用
下载
收藏
页码：26 / 40
页数：14
相关论文
共 22 条
  • [1] CHEN T N, REN H Q, LI S L, Et al., Test and numerical research of explosion inside partial confined tunnel structure, Acta Armamentarii, pp. 1-10, (2023)
  • [2] WANG Q R, ZHANG X Z, KONG F L, Et al., Shock wave propagation of an explosion inside its entrance to a multi level gallery tunnel, Explosion and Shock Waves, 31, 5, pp. 449-454, (2011)
  • [3] KONG F L, ZHANG X Z, WANG Q R, Et al., Research on the propagation law of air shock waves in three types of structural forms of tunnels, 椅 Proeeding of the 14th National Conference on Shock Waves and Shock Tubes, pp. 253-258, (2010)
  • [4] MU C M, REN H Q, LI Y C, Et al., Numerical investigation on blast shock wave propagation in the complex tunnel, Explosive Materials, 37, 5, pp. 1-4, (2008)
  • [5] SHI B J, MU C M, MA H F, Et al., Cavity effect on the characteristics of methane blast wave propagation in the whole roadway, Journal of China Coal Society, 45, S2, pp. 841-849, (2020)
  • [6] ZHANG X B, SHEN S S, YANG M, Et al., Influence of length and angle of bifurcated tunnel on shock wave propagation, Journal of Loss Prevention in the Process Industries, 78, (2022)
  • [7] QIN B, ZHANG Q, XIANG C, Et al., Numerical simulation research on shockwave propagation characteristics inside branch tunnel, Chinese Journal of Energetic Materials, 16, 6, pp. 741-744, (2008)
  • [8] QIN B, ZHANG Q, XIANG C, Et al., Research on the shockwave turbulence area inside the bend tunnel by numerical simulation, Metal Mine, 10, pp. 16-20, (2008)
  • [9] LI X D, FANG H, GENG Z G, Et al., Propagation and attenuation of airblast from thermobaric explosive inside L-shaped tunnel, Protective Engineering, 3, pp. 33-38, (2017)
  • [10] WANG H M, HU F., Preliminary study on multiple peak values of explosion shock waves in tunnels, Blasting, 1, pp. 14-16, (1991)
123