掘进侵彻弹形与侵彻混凝土深度演绎过程研究

Study on the Influence of Projectile Shape on Rotary Penetration Depth of Concrete Target

为研究掘进侵彻弹形与深度的演绎过程,运用LS-DYNA动力学软件对不同弹形头部、不同着速下掘进侵彻混凝土过程进行了仿真研究,仿真结果表明：低着速时,带切削刃的钻形掘进侵彻方式可提高侵彻深度;高着速时,卵形弹更具优势;旋转速度为70kr/min时,加载速度为350~500m/s时,带切削槽的卵形弹能使侵彻深度最大;在较优加载条件时,切削槽的深度对侵彻深度影响最大,斜度影响次之,切削槽的迎靶面形状对侵彻深度影响最小。试验结果与仿真结果吻合较好。

To study the effect of the projectile shape on rotary penetration depth（RDP）of concrete target,LS-DYNA was used to simulate the process of projectile penetrating the target under different projectile-shapes and different velocities.Simulation results show that drilling-head shape projectile can increase RDP with low velocity,while ogive-nose shape projectile can do well with high velocity,and the drilling-head and ogive-head shape can improve penetration performance.When rotary velocity is 70kr/min and the axis velocity is 300-400 m/s,the RDP of ogive-head projectile with cutting slot is maximum.Under excellent loading conditions,the depth of the cutting slot has the larger effect on penetration depth than the slope,and the cutting slot shape that relatives to target surface has little effect on the penetration.The simulation results agree well with the experiment data.