自然通风隧道内爆炸冲击波传播特性研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (24) : 172-176.

论文

自然通风隧道内爆炸冲击波传播特性研究

宁鹏飞1,2 唐德高1

作者信息 +

Analysis of characteristics of shock wave propagation in natural ventilation tunnel

Ning-Pengfei 1,2 Tang-Degao1

Author information +

文章历史 +

摘要

自然通风隧道节能环保，是当前城市地下交通建设积极采用的一种隧道形式。针对自然通风隧道的特点，采用数值模拟方法计算了自然通风隧道内爆炸流场，分析了通风口面积大小和炸药离通风口距离对隧道内爆炸流场的影响。研究表明在隧道内发生爆炸时通风口有泄压效应，通风口面积和离炸药距离增大均会引成隧道内爆炸冲击波到达时间延长和超压峰值减小。采用量纲分析方法得到了自然通风隧道内超压峰值衰减的计算模型，并利用计算数据拟合得出了超压峰值衰减经验公式。

Abstract

Natural ventilation tunnel has been constructed in many areas for its excellent behavior in saving energy. In order to investigate the characteristics of shock wave propagation in natural ventilation tunnel， the flow field of chemical explosion inside tunnel was calculated using finite element method. The influence of the vent area and the distance between charge and vent to shock wave propagation was analyzed. The result show vent had a release effect as chemical explosives were detonated in tunnel. As vent area enlarged, shock wave arrival times became longer and peak pressure value became smaller. Calculation model of the peak pressure attenuation was obtained using dimension analysis. A empirical formula was fitted using the calculation results.

导出引用

宁鹏飞; 唐德高. 自然通风隧道内爆炸冲击波传播特性研究[J]. 振动与冲击, 2012, 31(24): 172-176

Ning-Pengfei; Tang-Degao . Analysis of characteristics of shock wave propagation in natural ventilation tunnel [J]. Journal of Vibration and Shock, 2012, 31(24): 172-176