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reflected shock wave
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  reflected shock wave
The results show that the reflected shock wave from the substrate dies out extremely fast that micron-sized particles used in PDTS do not encounter these transients.
      
Upon interaction of the shock wave and the combined discontinuity, the type of the transient or reflected shock wave may coincide with or differ from the type of the incident shock wave.
      
Lifting of dust particles behind a reflected shock wave sliding above a particle layer
      
Regimes in which a reflected shock wave does not appear at all have been found in the problem of shock-wave reflection from a rigid wall.
      
A criterion of formation of a reflected shock wave is obtained based on the numerical and analytical solutions of the problem.
      
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The biological effects of the reflected and the diffracted wave of weak blast wave were explored by placing the end plate in biological shock tube.The results indicated that the overpressure of reflected shock wave was much stronger,which was about 2 times higher than that of incoming shock wave.The injuries of lung and gastrointestinal tract were found in the experiments of reflected wave effects.However,the overpressure of the primary wave of diffracted shock wave...

The biological effects of the reflected and the diffracted wave of weak blast wave were explored by placing the end plate in biological shock tube.The results indicated that the overpressure of reflected shock wave was much stronger,which was about 2 times higher than that of incoming shock wave.The injuries of lung and gastrointestinal tract were found in the experiments of reflected wave effects.However,the overpressure of the primary wave of diffracted shock wave significantly decreased,which was only 1/3 of that of the incoming shock wave.The overpressure of the secondary wave of diffracted shock wave was correlated with distance between the end plate and monitoring point.It was lower than that of incoming shock wave when the distance was 1/4 or 2 times of endplate height.But it was higher when the distance was 1/2 or 1 times of equal to the endplate height,which indicated that the shock wave was superposed in these areas.No significant injuries of visceral organs were found in the animal experiments.The results of this study is helpful for the protection of blast injuries.

采用生物激波管内放置挡板,探讨弱冲击波的反射及绕射作用对生物效应的影响。结果表明反射激波超压明显增强,约为入射激波超压的3 倍,并可引起动物肺和胃肠道损伤;绕射激波的一次激波超压明显降低,约为入射激波的1/3 ,二次激波与距挡板的距离有关,当距离为挡板高度的1/4 和2 倍时,超压低于入射激波,距离为挡板高度的1/2 和1 倍时,超压稍高于入射激波,提示该处激波有叠加现象,实验动物均未见明显内脏器官损伤。本研究结果对冲击伤防护具有一定的意义

 
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