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小行星撞击地球的超高速问题

柳森 党雷宁 赵君尧 白智勇 黄洁 李毅 石义雷

柳森, 党雷宁, 赵君尧, 白智勇, 黄洁, 李毅, 石义雷. 小行星撞击地球的超高速问题[J]. 力学学报, 2018, 50(6): 1311-1327. doi: 10.6052/0459-1879-18-313
引用本文: 柳森, 党雷宁, 赵君尧, 白智勇, 黄洁, 李毅, 石义雷. 小行星撞击地球的超高速问题[J]. 力学学报, 2018, 50(6): 1311-1327. doi: 10.6052/0459-1879-18-313
Liu Sen, Dang Leining, Zhao Junyao, Bai Zhiyong, Huang Jie, Li Yi, Shi Yilei. HYPERVELOCITY ISSUES OF EARTH IMPACT BY ASTEROIDS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(6): 1311-1327. doi: 10.6052/0459-1879-18-313
Citation: Liu Sen, Dang Leining, Zhao Junyao, Bai Zhiyong, Huang Jie, Li Yi, Shi Yilei. HYPERVELOCITY ISSUES OF EARTH IMPACT BY ASTEROIDS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(6): 1311-1327. doi: 10.6052/0459-1879-18-313

小行星撞击地球的超高速问题

doi: 10.6052/0459-1879-18-313
详细信息
    作者简介:

    null

    1) 柳森,研究员,主要研究方向:超高速空气动力学和超高速碰撞动力学. E-mail: liusen@cardc.cn

    通讯作者:

    柳森

  • 中图分类号: P185;

HYPERVELOCITY ISSUES OF EARTH IMPACT BY ASTEROIDS

  • 摘要: 小行星撞击地球是人类生存面临的潜在威胁之一.在小行星进入地球大气与撞击地球表面过程中,存在烧蚀、解体、空中爆炸、火球、撞击成坑、反溅碎片云、地震以及海啸等一系列复杂的物理化学和力学现象.本文梳理和归纳了与这些现象相关的超高速空气动力学问题和超高速碰撞动力学问题.小行星进入地球大气的超高速空气动力学问题有:极高速($V = 12 ~ 20$km/s)进入条件下的气动力与轨迹,极高速进入条件下的小行星气动加热与烧蚀机理,极高速气动加热条件下的小行星结构传热与热响应,极高速进入条件下的高温气体效应,小行星进入过程的物理特征.小行星撞击地球的超高速碰撞动力学问题有:陆地撞击成坑与反溅碎片云,海洋撞击与海啸,撞击过程的地震效应.由于小行星撞击地球与超高速飞行器的再入过程在速度、材料和结构上存在较大差异,针对这些超高速问题,现有的研究手段在地面试验和数值计算两方面都存在不足.最后,从小行星进入地球大气的弹道方程、质量损失方程、解体判据和解体模型等出发,初步建立了小行星进入与撞击效应分析评估模型,并对Chelyabinsk和Tunguska两次流星事件进行了分析,重构了进入与爆炸解体过程,评估了空爆火球在地面所导致的超压和热辐射损伤.

     

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  • 收稿日期:  2018-09-23
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