University of Rhode Island, Kingston, RI, USA.
University of Rhode Island, Kingston, RI, USA.
J Mech Behav Biomed Mater. 2023 Sep;145:106035. doi: 10.1016/j.jmbbm.2023.106035. Epub 2023 Jul 20.
An experimental investigation was performed on human lung simulants to evaluate their response to an underwater explosive blast. The artificial lungs were instrumented with sensors to record changes in the internal pressure and strains for a specimen with and without a surrounding ribcage. The lungs were to-scale models representative of a 50th-percentile male. The experiments were performed using 65.5 mg of explosive charge placed 0.5 m from the lungs in an 8,200-liter water tank. The tank was instrumented with blast transducers and high-speed cameras to measure the pressure from the explosive charge and record the lung deformation history through high-speed images and digital image correlation. Results showed a significantly delayed response to the underwater blast due to the lungs' inertia. In addition, the lung response was indifferent to its orientation relative to the shock direction. The lungs initially contracted after the underwater shock and then expanded, showing a 50% change in relative volume, from minimum to maximum volume, over a 7 ms duration. Results and observations qualitatively relate to the types of injuries observed during preexisting case studies.
一项针对人体肺模拟物的实验研究，旨在评估其对水下爆炸冲击的反应。人工肺配备了传感器，用于记录有和无周围肋骨笼的样本内部压力和应变的变化。这些肺是代表 50 百分位数男性的按比例缩小的模型。实验使用放置在离肺 0.5 米处的 65.5 毫克爆炸物，在 8200 升水箱中进行。水箱配备了爆炸传感器和高速摄像机，以测量爆炸物产生的压力，并通过高速图像和数字图像相关记录肺变形历史。结果表明，由于肺的惯性，对水下爆炸的响应明显延迟。此外，肺的响应与其相对于冲击波方向的方位无关。水下冲击波后，肺最初收缩，然后膨胀，在 7 毫秒的时间内，相对体积从最小到最大体积变化了 50%。结果和观察结果定性上与先前案例研究中观察到的损伤类型有关。
