爆炸冲击波在地铁车站内传播规律的数值模拟

采用AUTODYN对6.5kgTNT炸药在地铁站台中心地面爆炸后冲击波的传播过程做了数值模拟，分析了冲击波在站台层的传播规律，以及冲击波沿楼梯和沿站台纵向的衰减规律，绘制了距站台地面1.5m高处的冲击波杀伤范围云图。计算结果表明：地铁车站内冲击波衰减缓慢，在柱间狭长区域超压要高于两侧相对开阔地带。在文中所研究的苏州某地铁车站内，炸药起爆后，在距离炸药大约20m以外不会发生人员伤亡，而在距离炸药12m以内杀伤范围线是不规则的，在柱间肺损伤的概率要比两侧相对开阔的空间高。在距离炸药4m以内的区域均在1%死亡线以内，越靠近装药中心死亡概率越高。

NUMERICAL SIMULATION OF PROPAGATION LAW OF BLAST WAVE INSIDE SUBWAY STATION

In this article, 6.5kgTNT is simulated to blow up with AUTODYN at the floor of a subway station. The propagation law of blast wave along the platform and the wave along the staircase plane and the lengthways of the station are analyzed to plot a Splash Radius contour of 1.5m high ground from the floor. It proves: In the subway stations, shock wave’s attenuation is slow, and the overpressure between the columns’ channel area is higher than that of the both sides open areas relatively. In the subway station of this paper, after the TNT blasted, there won't be casualties over about 20 m far from the TNT. Within about 12m far from the TNT, the casualties range line is irregular. The lung injury probability between the columns is higher than that of the both sides open areas relatively. The area within 4m far from the TNT is included in the 1% dead line, and the closer to charging center, the higher risk of death