基于弹靶斜碰的跳弹轨迹预测模型研究

Prediction model of the ricochet trajectorybased on oblique collision of projectile targets

针对弹靶斜碰这一实弹训练或弹药侵彻试验研究中常见的工况,及其可能造成的跳弹安全防护难题,提出了弹靶斜碰跳弹轨迹预测模型。利用该模型可科学预测弹靶斜碰过程中,弹靶一次或多次碰撞位置以及弹体碰撞后的运动轨迹,对制定跳弹安全防护措施,避免事故的发生具有非常重要的意义,同时还可为防护工程中偏航结构的设计和优化提供理论依据。通过30 mm口径试验弹体与90 mm厚45号钢靶的斜撞试验验证,轨迹预测模型给出的弹体二次撞击落点与试验落点最大误差3.14%,符合工程实际应用要求。

For the common working condition of oblique collision of projectile targets in live ammunition training or an ammunition penetration test and its possible ricochet safety protection problem caused in the process,this paper proposes a prediction model of the ricochet trajectory based on oblique collision of projectile targets.This model can be used to scientifically predict the collision location of a projectile for one or multiple times and the trajectory of the projectile body after oblique collision,which is of great significance to formulate ricochet safety protection measures and avoid the occurrence of accidents.At the same time,it can also provide a theoretical basis for the design and optimization of the yaw structure in the protection engineering.Through the oblique impact test of a 30 mm-caliber projectile and a steel target No.45 with a thickness of 90 mm,the maximum error between the second impact point of the projectile regulated in the trajectory prediction model and the test point is 3.14%,which meets the requirements of practical engineering application.