俯仰角速度对弹丸侵彻多层靶弹道影响

Influence of the Pitch Angular Velocity on the Ballistic Trajectory of Projectiles Penetrating into Multi⁃layered Target

针对俯仰角速度对弹丸侵彻多层靶弹道的影响问题,在分析大量文献数据与数值模拟数据基础上,采用LS⁃DYNA有限元软件,开展了考虑/不考虑俯仰角速度条件下弹丸侵彻多层靶数值模拟,对比了着靶时间、着靶速度、着靶点偏移、攻角、着角、引信过载等数据,结果显示考虑俯仰角速度下的数值模拟结果与试验更吻合。基于此,模拟分析了不同大小、方向俯仰角速度对弹丸侵彻多层钢筋混凝土靶弹道的影响,结果表明同等大小情况正向俯仰角速度比负向俯仰角速度对弹道影响更大,且为确保弹丸在目标建筑物内爆轰,其俯仰角速度大小、方向须控制在-627°·s^(-1)~427°·s^(-1)之间。

In order to investigate the influence of the pitch angular velocity on the penetration trajectory of projectile penetrating into multi⁃layered target,a large amount of experimental and simulation from literature was analyzed.In the paper,LS⁃DYNA fi⁃nite element software was used to simulate the projectile penetrating into multi⁃layered slabs with or without considering the pith angle velocity.Data obtained in the simulations,like the paper studied the pith angle,landing time,landing speed,landing off⁃set,angle of attack,landing angle,fuse overloading and etc.,were compared with the experimental results.The results show that the numerical simulation was agreed well with the corresponding experimental data,when the pitch was taken into consid⁃eration.The influences of pitch with different values and directions on the trajectory of projectile penetration into multi⁃layered reinforced concrete slabs were analyzed.It shows that,under the same value,the positive pith angular velocity had a greater in⁃fluence than the negative one.Secondly,in order to ensure that the projectile explode in the target building,the value and direc⁃tion of the pith angular velocity of the projectile must be controlled between-627°·s^(-1)and 427°·s^(-1).