摘要
作为未来化战争条件下打击地下深层战略目标的一种重要武器装备,"上帝之杖"天基动能武器对维护国家利益和领土完整意义重大。综合考虑了外界温度、压强、海拔高度、大气密度、飞行速度等因素对弹体在大气层中所受空气阻力的影响,分析计算出"上帝之杖"动能弹的入地速度达3 401.7 m/s;目前,受到实验技术和方法的限制,只有Gold取得了几组动能弹高速侵彻混凝土靶的实验数据,且最高侵彻速度不足2 km/s,对诸如"上帝之杖"这么高侵彻速度的动能弹侵彻混凝土靶的实验研究还是空白;因此,进行了"上帝之杖"动能弹侵彻C60半无限混凝土靶的数值模拟和理论研究。研究结果表明:数值模拟所得的最终侵彻深度(18.9 m)与理论计算结果(17.3 m)的误差在允许的范围内,混凝土靶的最终开坑直径达7.333倍弹径;不同于刚性弹侵彻过程中侵彻速度持续衰减的特点,"上帝之杖"超高速动能弹侵彻的瞬态高压阶段弹头侵彻速度锐减,动能损失率极高,相应侵彻深度小;稳定侵彻阶段弹头侵彻速度和弹长消蚀速度保持稳定,弹体动能损失率基本不变,侵彻深度却线性增加;当动能弹着靶速度足够大时,最终侵彻深度主要受弹靶材料密度控制,受弹靶强度影响不大,高密度分层防护结构在抗超高速动能弹侵彻领域优势显著。
In the future war,＂God stick＂space-based kinetic energy weapons play an important role in attacking deep underground targets,and it is also significant for safeguarding the national interests and territorial integrity.Considering the impact of outside temperature,pressure,altitude,atmospheric density,flight speed and other factors on the air friction,the ＂God stick＂kinetic energy projectile＇s speed was analysed,which shows it could reach 3401. 7 m / s.Currently,limited by experimental techniques and methods,only Gold has achieved a few groups of experimental datas inregard to a high-speed kinetic energy projectile penetrating into concrete targets,whose highest penetration velocity is merely less than 2 km / s. But the experimental study on ultra-high-speed kinetic energy projectile,like the ＂ God stick＂,penetrating into concrete targets still leaves a blank. In the article,the theoretical and numerical simulation analyses of the＂God stick＂penetrating a semi-infinite concrete targets were completed. The results show that the final penetration depth obtained by numerical simulation（ 18. 9 m） agrees well with the theoretical results（ 17. 3 m）; the finally crater diameter of concrete targets reaches 7. 333 times of the diameter of bomb; other than the continuously declined velocity of a rigid projectile,during the process of ＂God stick＂hypervelocity penetration,a phase of transient high pressure will quickly drop the velocity of warhead with high kinetic energy loss rate and small corresponding penetration depth; in the stable penetration stage,the warhead speed and the rod length maceration keep stable,the kinetic energy loss rate maintains basically unchanged and the depth of penetration linearly increases. When the impact speed of projectile reaches a large enough value,the final penetration depth is mainly affected by the density of projectile and target materials,not by the target strength. So the high-density stratification protective structure is of great advantage in anti-hypervelocity penetration area.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第18期159-164,180,共7页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50979112)
重庆市国土资源和房屋管理局科技计划项目(CQGU-KJ-2014052)
重庆市基础与前沿研究计划项目(CSTC2015JCYJA30007
CSTC2014JCYJA30015
CSTC2014JCYJA30014
CSTC2014JCYJA30011)
重庆市研究生科研创新项目(CYB14103)
