Stability analyses of the mass abrasive projectile high-speed penetrating into a concrete target Part III: Terminal ballistic trajectory analyses

查看全文 作　　者：[1]H.Wu;[1]X.W.Chen;[2]Q.Fang;[2]X.Z.Kong;[1]L.L.He

机构地区：[1]Institute of Systems Engineering, China Academy of Engineering Physics;[2]State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology

出　　处：《Acta Mechanica Sinica》索引2015年第31卷第4期,共12页

基　　金：supported by the National Outstanding Young Scientist Foundation of China(Grant 11225213);the Fund for Creative Research Group of China(Grant 51321064);the National Natural Science Foundations of China(Grants 11172282,11390362,and 51378015) 摘　　要：During the high-speed penetration of projectiles into concrete targets(the impact velocity ranges from 1.0 to1.5 km/s), important factors such as the incident oblique and attacking angles, as well as the asymmetric abrasions of the projectile nose induced by the target-projectile interactions,may lead to obvious deviation of the terminal ballistic trajectory and reduction of the penetration efficien y. Based on the engineering model for the mass loss and nose-blunting of ogive-nosed projectiles established, by using the Differential Area Force Law(DAFL) method and semi-empirical resistance function, a finit differential approach was programmed(PENTRA2D) for predicting the terminal ballistic trajectoryofmassabrasivehigh-speedprojectilespenetrating into concrete targets. It accounts for the free-surface effects on the drag force acting on the projectile, which are attributed to the oblique and attacking angles, as well as the asymmetric noseabrasionoftheprojectile.Itsvalidationontheprediction of curvilinear trajectories of non-normal high-speed penetrators into concrete targets is verifie by comparison with available test data. Relevant parametric influentia analyses show that the most influentia factor for the stability of terminal ballistic trajectories is the attacking angle, followed by the oblique angle, the discrepancy of asymmetric nose abrasion, and the location of mass center of projectile. The terminal ballistic trajectory deviations are aggravated as the above four parameters increase. 关键词：稳定性分析混凝土靶质量损失高速侵彻磨料弹丸侵彻有限差分方法弹道轨迹

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Stability analyses of the mass abrasive projectile high-speed penetrating into a concrete target Part III: Terminal ballistic trajectory analyses

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