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徐文杰, 刘芹芹, 申旭辉. 小行星撞遇陆地成坑动力学的计算模拟[J]. 深空探测学报(中英文), 2024, 11(2): 195-202. DOI: 10.15982/j.issn.2096-9287.2024.20230060
引用本文: 徐文杰, 刘芹芹, 申旭辉. 小行星撞遇陆地成坑动力学的计算模拟[J]. 深空探测学报(中英文), 2024, 11(2): 195-202. DOI: 10.15982/j.issn.2096-9287.2024.20230060
XU Wenjie, LIU Qinqin, SHEN Xuhui. Computational Simulation of the Dynamics of Craters Formed by Asteroid Collisions with Land[J]. Journal of Deep Space Exploration, 2024, 11(2): 195-202. DOI: 10.15982/j.issn.2096-9287.2024.20230060
Citation: XU Wenjie, LIU Qinqin, SHEN Xuhui. Computational Simulation of the Dynamics of Craters Formed by Asteroid Collisions with Land[J]. Journal of Deep Space Exploration, 2024, 11(2): 195-202. DOI: 10.15982/j.issn.2096-9287.2024.20230060

小行星撞遇陆地成坑动力学的计算模拟

Computational Simulation of the Dynamics of Craters Formed by Asteroid Collisions with Land

  • 摘要: 小行星撞遇陆地是一个复杂的非线性动力学过程,难以通过模型试验的方法开展相关研究。数值计算为这一灾害动力学过程分析提供了重要的工具,基于自主研发的CoSim软件中离散元(Discrete Element Method,DEM)模块初步实现了小行星撞遇陆地的大规模计算模拟。基于小行星撞遇陆地三维动力学全过程的数值仿真结果:实现了初始接触、撞遇挖掘、高速抛射和回落调整4个撞击阶段全过程仿真;小行星的碰撞入射角及撞遇过程中动力学行为将影响撞击坑的地形地貌特征。研究也表明大规模数值计算方法可较好地实现小行星撞遇地球这一动力学过程,为小行星防御提供支撑。

     

    Abstract: TheThe process of an asteroid impacting the land is a complex non-linear dynamic process, which is difficult to study by using model tests. Numerical simulation provides an important tool for the analysis of this process. In this study, the large-scale numerical simulation of the dynamic process of the asteroid impacting land was realized initially by using the self-developed software CoSim-DEM based on the discrete element method (DEM). Based on the numerical simulation results, the four stages of the impact process—initial contact, impact excavation, high-speed ejection and adjustment—were simulated; the incidence angle and the dynamic behaviors of the asteroid during the impact process would affect the topographic characteristics of the crater. This study also indicates that large-scale numerical methods can be used to perform the analysis of dynamic process of the asteroid impacting the earth, and provide support for asteroid defense.

     

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