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含能材料  2014 

PDV方法测量电爆炸驱动小飞片速度

DOI: 10.3969/j.issn.1006-9941.2014.03.026

Keywords: 爆炸力学,飞片速度,光子多普勒速度测量技术(PDV),电爆炸

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Abstract:

为优化爆炸箔起爆器性能,采用光子多普勒速度测量技术(PDV)获得了电爆炸驱动小飞片的速度历程。设计了一种电爆炸驱动小飞片测试装置,可以产生Φ0.35mm×25μm尺寸的小飞片,试验中未对飞片进行任何处理。对两发电爆炸驱动小飞片进行了PDV测速试验,获得了小飞片的速度历程,测得的有效时长约为160ns。两发飞片的最大速度分别为4520m·s-1和4330m·s-1,速度差约为4%,一致性较好。飞片速度剖面有明显拐点。在拐点之前速度上升较快,在60ns(0.1mm位移)内达到了最终速度的75%。在拐点之后,速度上升相对变缓,在100ns内完成了剩余25%速度的增加。

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