A Study to Assess the Use of Cylindrical Bars as Blast Barriers
A Study to Assess the Use of Cylindrical Bars as Blast Barriers
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DOI：
10.1260/2041-4196.6.2.263
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发表时间：
2015-06
影响因子：
2
通讯作者：
J.E. Niollet;S. Yuen;G. Nurick
中科院分区：
文献类型：
--
作者：
J.E. Niollet;S. Yuen;G. Nurick
本文给出了一项实验研究的结果，以评估放置在爆炸源和靶板之间的圆柱杆如何通过结构的偏转来破坏撞击靶板的冲击波及其减爆能力。破坏冲击波的爆炸障碍物由直径25毫米的软钢实心棒材制成，并以六种不同的布置布置，以提供不同程度的干扰。在规划阶段，使用LS-DYNA进行了数值研究，以深入了解压力波与障碍物的相互作用，并调查其他杆件布置的影响。爆炸试验是在弹道摆上使用爆炸管进行的，每种屏障配置使用了6种不同的炸药，从20g到70g不等。靶板为方形DOMEX 550钢，厚度2 mm，暴露面积200 mm×200 mm。结果表明，在电荷和目标结构之间放置屏障可能具有衰减效果或更具破坏性，具体取决于屏障的位置和数量。就所进行的一系列实验而言，与使用的杆数相比，杆子相对于炸药装药的位置似乎对靶板的响应有更大的影响。
This paper presents the results of an experimental study to assess how cylindrical bars placed between an explosive source and a target plate disrupt the blast wave impinging on the target plate and its blast mitigation capabilities by means of the deflection of the structure. The blast barriers disrupting the blast wave were made from 25mm diameter mild steel solid bars and laid out in six different arrangements to provide different levels of disturbance. In the planning phase, a numerical investigation using LS-Dyna was carried out to provide insights of how the pressure waves interact with the barriers and to investigate the effect of other arrangement of the bars. The blast tests were carried out using a blast tube on a ballistic pendulum with six different charges ranging from 20g to 70 g used for each barrier configuration. The target plates were square Domex 550 steel with a 2 mm thickness and an exposed area of 200 mm × 200 mm. The results showed that placing a barrier between a charge and a target structure may have attenuating effects or more damaging effects depending on the location and number of barriers. For the set of experiments carried out, the placement of the bars with respect to the explosive charge appeared to have a greater influence on the response of the target plate compared to the number of bars used.