Abstract This paper concerns the mitigation of damage in aircraft luggage containers subjected to internal blast loading. It reports findings of experimental and computational work on the influence of venting on the blast response of scaled unit load devices. The internal geometry of the structure was based on a 1:6 scale version of the commonly used LD-3 unit load device. To simplify the problem, only the face closest to the aircraft primary structure could deform whilst the other walls were kept rigid. Small, spherical, charges of PE4 plastic explosive were detonated inside the scaled structures. The fully confined blast tests exhibited the highest permanent displacements and were the only tests to produce rupture of the target plate. Introducing venting reduced the target plate displacement significantly. Computational simulations were developed using LS-Dyna to provide additional insight into the blast loading and its interaction with the structure beyond what could be measured experimentally. Venting appeared to have no effect on the pressure peak, but it was effective at removing the late-time pressure reflections. The influence of the side venting was slightly obscured in the experiments due to boundary pulling-in effects at higher charge masses, but the simulations showed that venting from two sides was slightly more effective in reducing target plate deformation than single-sided venting. The paper demonstrates the potential benefit of using LD-3 ULDs unit load device with canvas sides (rather than solid ones) and venting lengthwise along the aircraft body to redirect the loading away from vulnerable locations.

中文翻译：

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通风对飞机行李箱在内部爆炸载荷作用下的响应的影响

摘要 本文涉及减轻受到内部爆炸载荷的飞机行李箱的损坏。它报告了关于通风对按比例单位负载设备的爆炸响应的影响的实验和计算工作的结果。该结构的内部几何形状基于常用 LD-3 单元负载设备的 1:6 比例版本。为了简化问题，只有最靠近飞机主要结构的面会变形，而其他壁保持刚性。小型球形 PE4 塑料炸药装药在鳞片结构内部引爆。完全封闭的爆炸试验表现出最高的永久位移，并且是唯一产生靶板破裂的试验。引入排气大大减少了目标板的位移。使用 LS-Dyna 开发了计算模拟，以提供对爆炸载荷及其与结构相互作用的额外洞察，超出了实验测量的范围。排气似乎对压力峰值没有影响，但它在消除后期压力反射方面是有效的。由于在较高装药质量下的边界牵引效应，侧面排气的影响在实验中略微模糊，但模拟表明，从两侧排气在减少目标板变形方面比单面排气更有效。该论文展示了使用带有帆布侧面（而不是实心侧面）的 LD-3 ULD 单元装载设备并沿飞机机身纵向通风以将装载从易受攻击的位置重新引导的潜在好处。