宁波大学学报：理工版
寧波大學學報：理工版
저파대학학보：리공판
Journal of Ningbo University(Natural Science and Engineering Edition)
2012年
1期
94-97
,共4页
超高速撞击%分子动力学模拟%碎片云%冰滴
超高速撞擊%分子動力學模擬%碎片雲%冰滴
초고속당격%분자동역학모의%쇄편운%빙적
hypervelocity impact%molecular dynamics%debris cloud%icy droplet
采用大规模分子动力学模拟，从原予层次探索了冰滴高速撞击航天铝壳结构的动态过程．冰滴的速度设置为典型的宇宙速度．在高速撞击时，部分动能转化为热能，使得撞击点附近迅速升温．随着撞击速度的提高，铝壳经历了弹性变形、塑性变形、冲击融化，最后被穿透的过程．在分子动力学模拟中，清楚地观测了碎片云的形成和动态行为．
採用大規模分子動力學模擬，從原予層次探索瞭冰滴高速撞擊航天鋁殼結構的動態過程．冰滴的速度設置為典型的宇宙速度．在高速撞擊時，部分動能轉化為熱能，使得撞擊點附近迅速升溫．隨著撞擊速度的提高，鋁殼經歷瞭彈性變形、塑性變形、遲擊融化，最後被穿透的過程．在分子動力學模擬中，清楚地觀測瞭碎片雲的形成和動態行為．
채용대규모분자동역학모의，종원여층차탐색료빙적고속당격항천려각결구적동태과정．빙적적속도설치위전형적우주속도．재고속당격시，부분동능전화위열능，사득당격점부근신속승온．수착당격속도적제고，려각경력료탄성변형、소성변형、충격융화，최후피천투적과정．재분자동역학모의중，청초지관측료쇄편운적형성화동태행위．
Large-scale molecular dynamics （MD） simulations are conducted to investigate the hypervelocity impact of the icy droplet on spacecraft A1 shell at the atomic level. The velocity of the droplet is set to move at a typical cosmic speed. Part of the kinetic energy of the droplet is converted to thermal energy, resulting in a sudden increase of the temperature. With the increase of the droplet speed, the aluminum plate experiences elastic, plastic deformation, melting and finally be penetrated by the droplet. The formation and dynamic behavior of a debris cloud is observed and investigated in the ~irnnlnticm~
