摘要
为提高防护结构的抗撞击性能,利用Abaqus有限元软件,建立卵形头弹对双层间隙式铝合金靶板的正侵彻模型,并借鉴已有文献验证其有效性。为方便后续研究,建立不同间隙的双层靶板撞击模型,研究靶板间隙对弹体能量耗散的影响。基于此,得到不同弹体倾角和靶板安装角的斜侵彻模型,通过对弹体轨迹偏转和剩余速度分析,得到其与倾角和安装角的关系。结果表明:弹体在击穿靶板后都会往靶板法向偏转,但其偏转角度与弹体倾角、靶板安装角以及弹体速度有关;第二层靶板相对于第一层靶板的安装角与弹体初始倾角方向相同能更大程度地提高防护结构的整体性能。
In order to improve the anti-collision performance of the protective structure,the ABAQUS finite element software was used to establish the normal penetration model of the ogival-nosed projectile into double-layer aluminum alloy targets,and the existing literature was used to verify its effectiveness.In order to facilitate the follow-up research,a double-layer targets impact model with different gaps was established to investigate the effect of target gap on the energy dissipation of the projectile.Therefore,oblique penetration model of different projectile inclination angle and target installation angle were obtained in order to obtain the relationship with the inclination angle and installation angle through the analysis of projectile trajectory deflection and residual velocity.The results show that the projectile will deflect normally towards the target after penetrating the target,but its deflection angle is related to the projectile inclination,target installation angle and projectile velocity.The installation angle is the same as the direction of the inclination angle of the projectile initial velocity can improve the overall performance of the protective structure to a greater extent.
作者
袁家俊
YUAN JiaJun(Center of Flight Simulation Research,Flight Technology College,Civil Aviation Flight University of China,Guanghan 618307,China)
出处
《机械强度》
CAS
CSCD
北大核心
2020年第6期1509-1514,共6页
Journal of Mechanical Strength
基金
中国民用航空飞行学院青年基金资助项目(Q2019-022)资助。
关键词
卵形头弹
双层靶板
倾角
弹体偏转
Ogival-nosed projectile
Double-layer target
Inclination angle
Projectile deflection
