抄録
After reviewing the history and mechanism of Whipple bumper shield to protect spacecrafts from the hypervelocity impact by micrometeoroids and orbital space debris, this paper proposes and demonstrates the methodology on the determination of ballistic limit curve of Whipple shield only by numerical analyses by using a hydrocode: AUTODYN. In the numerical method, fragmentations and phase changes of projectile and target materials are taken into account.