Small-Scale Blast Wave Experiments by Means of an Exploding Wire
Small-Scale Blast Wave Experiments by Means of an Exploding Wire
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DOI：
10.1007/978-3-319-70831-7_9
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发表时间：
2018-01-01
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影响因子：
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通讯作者：
Ben-Dor, Gabi
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文献类型：
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作者：
Sadot, Oren;Ram, Omri;Ben-Dor, Gabi
在过去的几十年里，为提高我们对高能爆炸事件的物理学的理解而投入的努力大大增加了。此外，在过去的二十年里，计算机能力的显著提高使得数值模拟方法成为研究与冲击波相关的现象及其影响的主要工具。然而，大规模和小规模的田间试验仍在使用中。接下来，我们提出了一种能够更好地解决和研究爆炸-结构相互作用现象的实验工具。此外，在将这些现象应用于模拟大规模事件之前，该实验工具可以帮助验证这些现象的数值模拟。该实验工具使用爆炸丝技术来产生小规模的柱面和球面爆炸波。这种方法允许安全操作、高重复性和使用无法在大规模现场实验中使用的先进诊断系统。使用分析模型、经验模型和数值模拟对系统进行了校准。为确保获得球形爆炸几何形状，进行了一套利用高速摄影监测爆炸波结构的自由空气爆炸实验。此外，通过使用相似分析，从小规模实验获得的结果可以应用于大范围的问题。研究表明，爆炸丝系统为研究爆炸-结构相互作用现象提供了一种廉价、可重复、安全、易于操作和有效的实验工具。
The effort invested in improving our understanding of the physics of high energy explosion events has tremendously increased in the past few decades. Moreover, the dramatic increase in computer capabilities over the last two decades made the numerical simulation approach the dominant tool for investigating blast wave related phenomena and their effects. However, both large- and small-scale field tests are still in use. In the following, we present an experimental tool capable of better resolving and studying the blast–structure interaction phenomenon. In addition, this experimental tool can assist in validating numerical simulations of these phenomena prior to applying them to simulate large-scale events. The experimental tool uses an exploding wire technique to generate small-scale cylindrical and spherical blast waves. This approach permits safe operation, high repeatability, and usage of advanced diagnostic systems that cannot be used in large-scale field experiments. The system was calibrated using an analytical model, an empirical model, and a numerical simulation. To ensure that spherical blast geometry was achieved, a set of free air blast experiments in which high-speed photography was used to monitor the blast wave structure was conducted. Furthermore, by using similitude analysis the results obtained from small-scale experiments can be applied to full-scale problems. It has been clearly shown that an exploding wire system offers an inexpensive, repeatable, safe, easy to operate, and effective experimental tool for studying phenomena involving blast–structure interactions.