【摘要】 研究地铁列车在隧道内发生恐怖爆炸袭击的灾害形成机理对城市公共安全与应急管理具有很好的理论和现实意义。用有限元方法对比研究了空旷隧道内爆炸和隧道车体内爆炸两种不同的事件过程,分析了两种事件情景下爆炸冲击波传播的异同。研究表明,在车体和隧道双重作用下,爆炸冲击波随时间和空间的衰减速度与空旷隧道内爆炸相比有明显降低,且出现大幅波动,冲击波峰值超压随距离不再呈现传统的近似指数衰减。车体的存在加剧了灾害演变的复杂性,在地铁反恐怖防范中应给予足够重视。更多还原

【Abstract】 Study on disaster formation mechanism of terrorist bomb attacks in subwaytrain has theoretical and practical significances for public safety and emergency management. The finite element method is used to comparatively study the explosion process in an empty tunnel and the explosion process in subway train,and analyze the difference or similarity between the propagations of the explosion shock waves generated from both the accidents. The research results shows that the attenuation of the explosion shockwave versus time and space under the action of train and tunnel are much slower than that in empty tunnel. this shockwave overpressure doesn’t show the traditional approximate index attenuation with distance from the ignition source. The accident process makes the disaster evolution more complicated,thus sufficient attention should be paid to subway counter-terrorism work.更多还原