动能弹侵彻混凝土靶结构的等效研究

针对目前弹体侵彻试验中混凝土靶体积大且成本高的问题,对混凝土靶结构进行了等效研究。利用三维计算软件程序模拟了动能弹对混凝土靶板的垂直侵彻过程。研究发现,Ma为2左右,靶弹直径比大于等于30的混凝土靶等效为半无限靶。进一步对不同靶弹直径比的靶板施加不同厚度的钢箍进行计算。结果表明,有钢箍的混凝土靶能减小边界效应对弹丸侵彻性能的影响,并得到了各个速度段钢箍厚度与靶弹直径比的定量关系,增加不同厚度的钢箍来等效半无限靶可达到减小靶体径向尺寸的目的,对降低试验成本具有重要的意义。

Study on Target Structure Equivalent of Kinetic Energy Projectile Penetrating Concrete Target

To solve the problems of the large volume and high cost of concrete in the penetration test,the structure equivalent of concrete was studied.The process of the kinetic-energy projectile vertically penetrating concrete target was simulated by using three-dimensional calculation software programs.According to the calculation results,the impact of projectile and target diameter-ratio on penetration was analyzed.The influence of boundary can be ignored when the diameter-ration between target and missile is equal or greater than 30,which is equivalent to the semi-infinite target.The results show that the circumferential constraints of concrete target can reduce the impact of the boundary effect on penetration capability,and the different enhancement restraint can further reduce the diameter of target body to reduce the radial dimension.The quantitative relationship was given.The study has important reference value to reduce the test cost.