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目的 了解枪弹与破片在高原的飞行速度特点 ,为高原战伤救治提供弹道学参数。方法 在海拔 36 5 8m的高原 ,分别采用弹道枪和军用步枪发射 2种制式枪弹和 3种不同形状的破片 ,以HWB 型红外线测速装置测定投射物在射距 1 0m和 2 0m的飞行速度 ,并以在平原地区 (海拔 35 1 .5m)完成的同样实验作为对照。结果 高原枪弹与破片速度比平原快。射距 2 0m ,5 .5 6mm弹和 7.6 2mm弹其速度分别增加 4 1 .5 5m/s和 4 0 .89m/s;1 .0 3g钢珠、0 .4 4g圆柱、0 .37g三角破片其速度分别增加 94 .6 5m/s、2 2 4 .2 8m/s和 2 6 3.38m/s。结论 高原投射物飞行速度较平原快 ,主要与高原空气密度稀薄、飞行阻力小有关
Objective To understand the characteristics of the flight speed of bullets and fragments in the plateau and to provide the ballistic parameters for the treatment of war injuries in the plateau. Methods Two types of bullets and three kinds of fragments with different shapes were shot by ballistic gun and military rifle at altitudes of 3658m. The flight speed of the projectile at the range of 1 0m and 20m was measured by HWB infrared velocimetry device. The same experiment done in the plains (35 1 .5 m above sea level) was used as a control. The results of plateau bullets and fragments faster than the plain. The shooting range of 20m, 5.5mm and 7.6mm 2mm elastic bombs increased by 41.55m / s and 40.89m / s respectively; 1.30g steel balls, 0.44g cylinders, 0.37g triangular fragments Its speed increased 94.65m / s, 22.428m / s and 26.38m / s, respectively. Conclusion Plateau projectiles flight faster than the plain, mainly with the thin air density on the plateau, the flight resistance is small