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对平板玻璃上弹孔形态与射击方向的相关性进行实验研究。确定了弹孔的放射裂纹特征、射入口轮廓特征、射出口层裂特征和弹孔长短轴特征是快速判断射击方向的主要特征。在减少影响因素的基础上,选取了弹孔长短轴比值作为曲线拟合数据,对射击角度与弹孔形态的关系进一步分析。研究结果表明,确保弹孔的形态完整,是精确分析射击角度的必要条件。弹孔的射入口与射出口的长短轴比值均可用于射击角度分析,射入口尺寸数据的价值更高。
The experimental study on the correlation between the shape of bullet holes and the shooting direction in flat glass was carried out. The characteristics of the radiation crack of the bullet hole, the characteristics of the entrance port profile, the spout of the exit port and the characteristics of the long and short bullet holes of the bullet hole are the main features for quickly determining the shooting direction. On the basis of reducing the influencing factors, the ratio of the major axis to the minor axis of the bullet hole was selected as the curve fitting data to further analyze the relationship between the shooting angle and the shape of bullet holes. The results show that ensuring the integrity of the bullet hole is a necessary condition for accurate analysis of firing angle. Bullet hole entrance and exit of the length and the short axis ratio can be used for shooting angle analysis, the entrance port size data of higher value.