高速投射物所致模拟循环管内流体动力效应的实验研究

An Experimental Study of Hydrodynamic Effect on the Simulating Circulatory System Caused by High Velocity Projectiles

本文在建立模拟动物循环管路内主要动力学参数实验模型的基础上，观测了高速投射物距撞击点不同距离循环管路内流体动力学因素的变化特征。结果表明，在距撞击点３０ｃｍ以外的模拟管路内可测到高于撞击前５～１１倍的压力峰值，管内压力波的脉动频率约２９．４１～４２．１Ｈｚ，传播速度约为１８．０４ｍ／ｓ，这意谓着，高速投射物撞击瞬间能引起循环管路内剧烈的流体扰动，并以压力波的形式在管路内传播。本研究结果为高速投射物致伤时远达效应致伤机理的研究提供了重要依据。

Based on an experimental model which we established to simulate the primary hydrodynamic parameters of the animal circulatory system. we observed the changes of the hydrodynamic effects caused by high velocity projectiles in the simulatory circulatory system within different distances from the impact point.The results showed that the pressure value at a point 30cm away from the impact point in the circulatory system was 5-11 times as high as that before being impacted. The pulsating frequency of pressure waves in the simulating tubes ranged from 29. 4 to 42. 1 Hz. while the spreading velocity was about 18. 04m/s. We suggested that the impact caused by gigh velocity projectiles results in strong fluid disturbance in distant circulatory system and the disturbance spreads as a pressure wave in the circulatory system. This may be one of the important factors for the occurrence of remote effect and some serious complications.