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含能材料  2011 

泡沫铝壳对水下爆炸冲击波衰减的影响

DOI: 10.3969/j.issn.1006-9941.2011.03.016

Keywords: 爆炸力学,泡沫铝壳,水下爆炸,冲击波衰减,峰值压力,水下摄影

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Abstract:

为了研究泡沫铝材料对水下爆炸冲击波的衰减特性,将泡沫铝材料制成不同壁厚的泡沫铝壳,初步研究了泡沫铝壳对水下爆炸冲击波衰减的影响。利用水下压力测试系统,分别测试了裸太安(PETN)药柱和将PETN药柱分别放入壁厚为1.5,2.5,3.5cm的泡沫铝壳中爆炸条件下,距药柱0.5m处的冲击波时程压力。通过对数据分析,发现泡沫铝壳不仅可以消减爆炸冲击波峰值压力,而且可以有效地吸收冲击波比冲量和冲击波比能。同时,利用水下摄影系统记录了泡沫铝壳在爆炸载荷作用下变形、破碎和运动的过程。结果表明:泡沫铝壳通过自身的压缩变形和破碎来消耗爆炸冲击波的能量,进而起到对水下爆炸冲击波的消减作用;泡沫铝壳的壁厚对水下冲击波衰减的影响十分明显。

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