长杆体稳定侵彻阶段头部形状的侵彻效率分析

Long rod penetration efficiency analysis of nose shape at quasi-steady penetration stage

基于不同材料长杆体稳定侵彻过程中破碎头部形状不同的事实,计算了两种初始头部形状相同但在稳定侵彻过程中破碎头部形状不同的杆体所受阻力,并基于此阻力求得对应头部形状的长杆体的侵彻深度,侵深值符合对应实验结果。阻力和侵深的结果比较表明,破碎头部形状尖锐的杆体侵彻效率高于较钝头部形状的杆体。

Based on the fact that the long rods of different materials have different nose shapes in the quasi-steady penetration process, the target resistances of the long rods with same initial nose shape and different nose shape in quasi-steady penetration process were obtainecl and the penetration depths of long rods corresponding to the nose shape were calculated. The penetration depths basically accord with the experimental results. The comparative results of target resistance and penetration depth indicate that the penetration efficiency of the long rod with a sharp nose shape is superior to that with a blunt nose shape. The conclusion can provide the basis for the structure design of the composited rod with a nose shape sustaining smaller target resistance in the quasi-steady penetration process.