城市隧道口部道路坡度对爆炸冲击波传播特性影响分析

宁鹏飞[;] 唐德高[]

振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 175-178.

PDF(1594 KB)
PDF(1594 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 175-178.
论文

城市隧道口部道路坡度对爆炸冲击波传播特性影响分析

  • 宁鹏飞[1,2] 唐德高[1]
作者信息 +

Analysis of influence of the entrance road grade of urban tunnel to characteristics of shock wave propagation

  • Ning-Pengfei [1,2] Tang-Degao[1]
Author information +
文章历史 +

摘要

隧道内爆炸冲击波流场及爆炸荷载计算是隧道抗内爆研究和预防恐怖爆炸袭击的首要问题。针对城市地下隧道的特点,采用三维有限元方法计算了地下隧道口部爆炸时隧道内的爆炸流场,分析了城市隧道口部爆炸时隧道内爆炸流场的特点和道路坡度对爆炸冲击波传播的影响。研究表明隧道内冲击波冲量随道路坡度增加而增大,随比例爆距的增加影响逐渐减小;超压峰值在比例爆距Z小于1m/kg1/3时无变化,当Z>1 m/kg1/3时各截面超压峰值随道路坡度的增大而增加,但最大不超过7%。

Abstract

Shock wave propagation and blast load calculation in underground tunnel is the key problem for tunnel anti-blast research. In order to investigate the characteristics of shock wave propagation in tunnel entrance, the flow field of chemical explosion inside tunnels was calculated using numerical simulation method. The characteristics of shock wave propagation and the influence of the road gradient to shock wave propagation was analyzed. The results show that the impulse increase with the road gradient and decrease with the scale distance. The peak overpressure increases with road gradient when scale distance Z>1m/kg1/3, but has no change as Z<1m/kg1/3. The variety of peak overpressure is less than 7%.

关键词

内爆炸 / 城市隧道 / 道路坡度 / 爆炸冲击波 / 数值模拟

Key words

Internal blast / urban tunnel / road grade / shock wave / numerical simulation

引用本文

导出引用
宁鹏飞[;] 唐德高[] . 城市隧道口部道路坡度对爆炸冲击波传播特性影响分析[J]. 振动与冲击, 2012, 31(21): 175-178
Ning-Pengfei [;] Tang-Degao[] . Analysis of influence of the entrance road grade of urban tunnel to characteristics of shock wave propagation[J]. Journal of Vibration and Shock, 2012, 31(21): 175-178

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