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为解决非球形弹丸正撞击充气压力容器问题,应用非线性动力学分析软件AUTODYN,在相同质量和速度的条件下,采用光滑质点流体动力学方法 SPH,对具有不同长径比的圆锥形弹丸、圆柱形弹丸撞击压力容器产生的碎片云特性进行数值模拟,分别分析圆锥形弹丸、圆柱形弹丸长径比对碎片云形态、尖端速度及径向扩展直径的影响。结果表明:弹丸形状及弹丸长径比对碎片云在高压气体中的运动特性影响较大。随着弹丸长径比的增加,圆柱形弹丸碎片云径向扩展直径减小;随着弹丸长径比的增加,相同质量和相同撞击速度的圆锥形弹丸及圆柱形弹丸碎片云的损伤力增强。
In order to solve the problem that a non-spherical projectile collides with an inflated pressure vessel, the nonlinear dynamic analysis software AUTODYN is applied to smooth the cone-shaped projectile with different aspect ratios by using the smooth particle hydrodynamic method SPH under the same mass and velocity conditions. The impact of the cylindrical projectile on the pressure vessel was numerically simulated. The effect of the aspect ratio of the projectile and the cylindrical projectile on the shape of the debris cloud, tip velocity and radial expansion diameter was analyzed. The results show that the projectile shape and projectile aspect ratio greatly influence the motion characteristics of debris cloud in high pressure gas. As the aspect ratio of the projectile increases, the diameter of the cylindrical projectile fragments decreases in the radial direction. As the projectile aspect ratio increases, the damage of the conical projectile and the cylindrical projectile fragment cloud of the same mass and the same impact velocity increases .