スペースデブリ摸擬構造への金属製銛撃ち込み時の摩擦が貫入挙動に与える影響評価

抄録

We have investigated shooting a harpoon into a target as capturing system of Active Debris Removal (ADR) and evaluated the effect of various tip shape harpoons with friction on penetration through the numerical simulation. We employed four tip shapes of harpoons, such as “conical”, “spherical”, “flat” and “double-bladed”. Friction was taken into account in the numerical analyses while changing the value from 0 to 0.3 in 0.1 increments. The harpoon was shot into the target while changing the velocity in 0.5 m/s increments. We called a minimum velocity for the penetration “minimum penetration velocity”. When an oblique angle of the target is large, the minimum penetration velocity of the harpoon is rapidly increased but it is decreased with large friction. The spherical and flat harpoon tip shapes do not achieve suitable penetration velocity when the friction is small. Regarding the flat harpoon tip shape, the minimum penetration velocity in the oblique angle of 30 deg is smaller than that of the oblique angle of 0 deg when the friction was considered. We obtained an insight into the effect of friction on penetration behavior through these simulations.