球形破片侵彻明胶的瞬时空腔模型  

Temporary Cavity Model of Spherical Fragments Penetrating Ballistic Gelatin

作　　者：莫根林[1] 吴志林[1] 刘坤[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《兵工学报》2013年第10期1324-1328,共5页Acta Armamentarii

基　　金：国家安全重大基础研究项目(613104)

摘　　要：为研究杀伤元对人体的致伤机理，采用明胶作为人体组织替代物，研究了球形破片侵彻明胶时瞬时空腔的运动规律。采用高速摄影获得了3mm、4mm和4．8mm钢球以650-1000m／s速度侵彻明胶的空腔实验数据。根据弹性变形假设和位移场假设，推导出空腔的运动为正弦运动。利用球形破片在明胶中的运动模型和空腔实验数据，建立了空腔振幅与能量、角频率与能量的经验公式。采用5·2mm钨球以800m／s速度侵彻明胶的实验结果对模型进行验证。Ballistic gelatin is used as a stimulant for human tissue in the experimental study of temporary cavity which is an important factor of ballistic injury. To study the motion of temporary cavities, the steel spheres with diameters of 3 mm, 4 mm and 4.8 mm are fired into the gelatin blocks at 650 ~ 1 000 m/s in the experiments. The movement of temporary cavity is recorded by a high speed camera. The sine motion of the cavity wall is deducted based on the displacement field assumption and the elastic deformation as- sumption of gelatin. The empirical relations between amplitude and energy, and frequency and energy are established using the experimental data while a penetration model of spherical fragments in gelatin is built. The model is used to predict the temporary cavity for a 5.2 mm tungsten sphere penetrating into ge- latin at 800 m/s. The predicted results are in good agreement with the experimental data.

关 键 词：兵器科学与技术 瞬时空腔 正弦运动 弹道明胶 球形破片 

分 类 号：O345[理学—固体力学]