分体式侵彻体斜侵彻钢靶的弹道稳定性数值模拟  

Numerical Simulation of Ballistic Stability of Split Penetrator Penetrating Steel Target

作　　者：吴翰林 屈可朋[1] 沈飞[1] 周涛[1] 郭洪福 谷鸿平[1] WU Hanlin;QU Kepeng;SHEN Fei;ZHOU Tao;GUO Hongfu;GU Hongping(Xi’an Modern Chemistry Research Institute,Xi’an 710065,Shaanxi,China)

机构地区：[1]西安近代化学研究所,陕西西安710065

出　　处：《高压物理学报》2020年第6期91-100,共10页Chinese Journal of High Pressure Physics

基　　金：国家安全重大基础研究项目(05020501)。

摘　　要：为提升弹体侵彻钢靶的弹道稳定性,设计了一种分体式侵彻体,运用LS-DYNA数值模拟得到了分体式侵彻体以不同着速、15°着角斜侵彻14 mm厚单层圆钢靶的弹道变化规律,讨论了前导体头部厚度和前导体安装间隙对弹体俯仰角和弹道偏移的影响机制。结果表明:分体式侵彻体可有效提升侵彻弹道稳定性;着速为500~700 m/s时,前导体头部厚度越大,弹体俯仰角度和弹道偏移越小,着速为800 m/s时,前导体头部厚度适中的弹体俯仰角和弹道偏移最小;前导体安装间隙能在特定工况下减少8%~12%的弹道偏转。这是由于低速侵彻时前导体未完全破坏,应力波的衰减程度随头部厚度的增加而增加;高速侵彻时前导体逐渐破损至完全破坏,可以最大程度地吸收撞击能量,提升弹道稳定性的效果最佳。增加前导体安装间隙可提升低速侵彻或头部厚度较大的前导体的破损程度。In order to improve the trajectory stability of the projectile penetrating the steel target,a split penetrator was designed.Through LS-DYNA simulation,the trajectory variation rule of the split penetrator penetrating 14 mm-thick single-layer round steel target at obliquely 15°and different speeds was obtained.The influence of both the thickness and the installation gap of the protective shell on the pitch angle and trajectory deviation of the projectile were also discussed.The results showed that the split penetrator can effectively improve the penetration trajectory stability.When the penetrator speed is 500–700 m/s,the greater the thickness of the protective shell head,the smaller the pitch angle of the projectile and the trajectory deviation.When the penetrator speed is 800 m/s,the deflection angle and trajectory deviation of the projectile with a moderate thickness of the protective shell keep at the minimum.Besides,the installation gap of the protective shell can reduce the deflection of the trajectory by 8%–12%under specific working conditions.This is because when penetrating at low speed,the protective shell is not completely destroyed,and the attenuation of the stress wave increases with the thickness of the head,while at high speed the protective shell is gradually broken to a complete destruction to absorb the impact energy to the greatest extent and improve to the best ballistic stability;By increasing the clearance of the protective shell installation,the damage of the protective shell with a thicker head or at low speed penetration can also be improved.

关 键 词：分体式侵彻体 斜侵彻 俯仰角 弹道偏移 弹道稳定性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O385[理学—流体力学]