隧道内爆炸冲击波传播特性及爆炸荷载分布规律研究

田志敏;邬玉斌;罗奇峰

振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 21-26.

PDF(2980 KB)
PDF(2980 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 21-26.
论文

隧道内爆炸冲击波传播特性及爆炸荷载分布规律研究

  • 田志敏1,2; 邬玉斌2; 罗奇峰3
作者信息 +

Characteristics of In-Tunnel Explosion-Induced Air Shock Wave and Distribution of Reflected Shock Wave Load inside a Tunnel

  • Tian Zhimin1,2; Wu yubin2; Luo Qifeng3
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摘要



隧道内爆炸产生复杂的爆炸冲击波流场,作用于隧道衬砌上的冲击波荷载分析十分困难.本文采用三维有限元计算方法,对带端墙隧道内爆炸空气冲击波的传播过程进行了数值模拟,给出了内爆炸产生的隧道内冲击波流场,并与双向开口隧道内爆炸流场进行了对比,分析了炸药装药形状、炸药引爆位置对爆炸荷载分布的影响,研究了作用于隧道衬砌上的反射冲击波荷载峰值分布规律,给出了估计衬砌上反射超压峰值的公式.

Abstract

Propagation of air shock wave inside a tunnel induced by internal explosions and distribution law of shock wave load on inner surface of the tunnel are studied in this paper. The flow fields of shock wave inside a tunnel with and without end walls are described on the basis of three-dimensional finite element analysis. Distribution laws of peak reflected overpressure (i.e. peak load) and impulse on inner surface of the tunnel are analyzed. Influences of shape and explosion height of TNT explosives on propagation of shock wave and the load are taken into account. The formula to evaluate attenuation of peak value of reflected shock wave load on inner surface of the tunnel with distance from the center of explosion is proposed.

关键词

隧道内爆炸 / 冲击波流场 / 反射冲击波荷载 / 衰减规律

Key words

in-tunnel explosion / flow field of shock wave / peak load / distribution / attenuation law

引用本文

导出引用
田志敏;邬玉斌;罗奇峰. 隧道内爆炸冲击波传播特性及爆炸荷载分布规律研究[J]. 振动与冲击, 2011, 30(1): 21-26
Tian Zhimin;Wu yubin;Luo Qifeng. Characteristics of In-Tunnel Explosion-Induced Air Shock Wave and Distribution of Reflected Shock Wave Load inside a Tunnel[J]. Journal of Vibration and Shock, 2011, 30(1): 21-26

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