典型小口径步枪弹侵彻明胶时空腔演化规律的实验研究

为了研究典型小口径步枪弹在侵彻明胶过程中空腔的形成与发展规律，实验中选用4℃/10%浓度配比，尺寸为300mm×300mm×300mm的明胶块作为靶标，并利用高速摄影进行拍摄测量。在100m射距下实验了3发SS1095.56mm步枪弹，获得3组空腔图像和压力波数据。通过对数据进行处理并与7.62mm步枪弹空腔图像数据对比分析得出:瞬时空腔最大直径在200~270mm范围内，脉动周期为11ms；瞬时空腔直径随侵彻时间呈半正弦波衰减曲线变化；杀伤元的形状对瞬时空腔的形状有显著影响，从而影响到杀伤威力的大小。 

Experimental Study on the Evolution of the Temporary Cavity in a Typical Small Caliber Rifle Bullet Penetrating Gelatin

In order to understand the formation and development law of the cavity with the small caliber rifle bullet penetrating the gelatin,an experiment was carried out,taking 4 ℃/10％ concentration ratio,size of 300 mm × 300 mm × 300 mm gelatin as target,and the high speed photography for measurement.Three 5.56 mm SS109 bullet's high speed photography and pressure curves of penetrating gelatin at 100 meters range were presented.Through processing the data and comparatively analyzing with the data of 7.62 mm rifle bullet,results show the following conclusions:the max diameter of temporary cavity is within 200～270 mm,the pulse cycle is about 11μs;the diameter of temporary cavity is attenuating as half sine wave curve with the penetration time;the shape and size of the killing element influence remarkably on the shape of the temporary cavity,thereby can relate to the lethal power of the ammunition.