Tailoring the Blast Exposure Conditions in the Shock Tube for Generating Pure, Primary Shock Waves: The End Plate Facilitates Elimination of Secondary Loading of the Specimen.
Tailoring the Blast Exposure Conditions in the Shock Tube for Generating Pure, Primary Shock Waves: The End Plate Facilitates Elimination of Secondary Loading of the Specimen.
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DOI：
10.1371/journal.pone.0161597
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Chandra N
中科院分区：
文献类型：
--
作者：
Kuriakose M;Skotak M;Misistia A;Kahali S;Sundaramurthy A;Chandra N
端板安装在激波管的口是一个多功能和有效的实施，以控制和减轻端效应。我们对入射冲击波速度和超压进行了一系列测量，随后对四种不同端板配置（0.625、2、4英寸和开口端）的脉冲值（时域压力积分）进行了量化。高响应率压力传感器沿6米长229毫米方截面激波管的6个位置分布，监测激波特性。试验在三种冲击波强度下进行，通过改变聚酯膜厚度（0.02、0.04和0.06英寸）来控制。末端反射板安装在激波管出口允许精确控制反射波的强度穿透到激波管。在优化后的管端板间隙处，二次波在试验段完全消除，这一点通过T4位置的压力传感器得到了证实。这是实现纯初爆波动物模型的显著发现。这些数据还表明，只有在激波管深处的实验条件下，才允许暴露在没有伪影的单一激波中。我们的研究结果提供了以氦气为驱动气体产生弗里德兰德波形并在中型管内空气中传播的激波的时空动力学的详细见解。激波管内驱动气体（氦）的扩散是反射激波速度增大的主要原因。数值模拟结合实验数据表明，激波衰减机理是内压的膨胀。在没有任何其他假设的激波衰减机制的情况下，理论和实验数据之间的一致性很好。
The end plate mounted at the mouth of the shock tube is a versatile and effective implement to control and mitigate the end effects. We have performed a series of measurements of incident shock wave velocities and overpressures followed by quantification of impulse values (integral of pressure in time domain) for four different end plate configurations (0.625, 2, 4 inches, and an open end). Shock wave characteristics were monitored by high response rate pressure sensors allocated in six positions along the length of 6 meters long 229 mm square cross section shock tube. Tests were performed at three shock wave intensities, which was controlled by varying the Mylar membrane thickness (0.02, 0.04 and 0.06 inch). The end reflector plate installed at the exit of the shock tube allows precise control over the intensity of reflected waves penetrating into the shock tube. At the optimized distance of the tube to end plate gap the secondary waves were entirely eliminated from the test section, which was confirmed by pressure sensor at T4 location. This is pronounced finding for implementation of pure primary blast wave animal model. These data also suggest only deep in the shock tube experimental conditions allow exposure to a single shock wave free of artifacts. Our results provide detailed insight into spatiotemporal dynamics of shock waves with Friedlander waveform generated using helium as a driver gas and propagating in the air inside medium sized tube. Diffusion of driver gas (helium) inside the shock tube was responsible for velocity increase of reflected shock waves. Numerical simulations combined with experimental data suggest the shock wave attenuation mechanism is simply the expansion of the internal pressure. In the absence of any other postulated shock wave decay mechanisms, which were not implemented in the model the agreement between theory and experimental data is excellent.
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影响因子：
3.8
作者：
Bolander, Richard;Mathie, Blake;Vandevord, Pamela
通讯作者：
Vandevord, Pamela
影响因子：
4.4
作者：
HOOKER, WJ;MILLIKAN, RC
通讯作者：
MILLIKAN, RC
影响因子：
--
作者：
KIEFER, JH;MIZERKA, LJ;WEI, HC
通讯作者：
WEI, HC
爆炸损伤引起的神经损伤的超微结构和功能特征
DOI：
10.1097/00005373-200104000-00017
发表时间：
2001-04-01
影响因子：
--
作者：
Cernak, I;Wang, ZG;Savic, J
通讯作者：
Savic, J
影响因子：
--
作者：
DRYER, M;MERRITT, DL;ARONSON, PM
通讯作者：
ARONSON, PM