摘要
依托自主搭建的坑道试验平台,开展了温压炸药在单向式和穿廊式坑道的爆炸试验。综合冲击波超压、正压时间和比冲量3项参数,研究了两种坑道中的冲击波传播规律,分析了坑道构型对波形演化及消波性能的影响,阐释了消波差异的形成机理。结果表明,在单向式和穿廊式坑道中,冲击波由支坑道进入主坑道后会在坑道迎爆面和背爆面产生多种相互作用,形成多峰波形。单向式坑道比冲量较直通式坑道没有明显差异,堵口爆炸和口内爆炸的转弯超压系数分别为1和1.2。穿廊式坑道较直通式坑道有了明显的消减效果,消波后的转弯超压系数和转弯冲量系数均约为0.6。单向式和穿廊式坑道中的冲击波消减效果差异源于冲击波到达主、支坑道连通位置后的传播路径差异。
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.
作者
纪玉国
张国凯
李干
邓树新
徐天涵
姚箭
李杰
王明洋
何勇
JI Yuguo;ZHANG Guokai;LI Gan;DENG Shuxin;XU Tianhan;YAO Jian;LI Jie;WANG Mingyang;HE Yong(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,Army Engineering University of PLA,Nanjing 210007,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2023年第S01期26-40,共15页
Acta Armamentarii
基金
国家自然科学基金项目(52278504)
江苏省自然科学基金项目(BK20220141)。
关键词
温压炸药
单向式坑道
穿廊式坑道
波形演化
消波性能
TBX
L-shaped tunnel
gallery tunnel
evolution of waveform
attenuation ability to shock wave
