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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
The baffle was placed in biological shock tube to study the effect of weak shockwave reflection and diffraction on biological effects. The results show that the reflected shock overpressure is significantly enhanced, about three times the incident shock overpressure, and can cause lung and gastrointestinal tract injury; a shock shock wave shock overpressure was significantly reduced, about the incident shock wave 1/3 of the secondary shock wave is related to the distance from the baffle. When the distance is 1/4 and 2 times the height of the baffle, the overpressure is lower than the incident shock wave and the distance is 1/2 and 1 of the baffle height Times, overpressure slightly higher than the incident shock wave, suggesting that there is a superposition of shock wave phenomenon, no significant visceral organ damage in experimental animals. The results of this study have some significance for the impact injury protection