高校地质学报2024，Vol.30Issue(2)：196-206,11.DOI:10.16108/j.issn1006-7493.2022094
基于离散元模拟的小行星微重力撞击采样研究
Asteroid Microgravity Impact Sampling Study Based on Discrete Element Method Simulation
摘要
Abstract
Impact sampling is a sampling method applicable to the microgravity environment on the surface of asteroids and has been successfully applied to the Hayabusa 1 and Hayabusa 2 asteroid exploration missions.In this paper,an asteroid microgravity impact sampling model is developed based on the domestic high-performance discrete element software MatDEM.The effects of initial impact velocity and projectile shape on the interior regolith features and ejecta after impact are investigated.The results show that increasing initial impact velocity can increase the stress and dense degree inside the same region of the regolith,and increase the number of ejecta particles and the number of ejecta particles from the deep part of the regolith.Within the same area of the regolith,the cone-headed projectile produces the highest stress peaks and the flat-headed projectile produces the lowest stress peaks.Round and flat-headed projectiles produce the highest number of ejecta particles and have the best deep sampling capability.Cone-headed projectile produces the lowest number of ejecta particles and has the weakest deep sampling capability.The conclusions help to understand the internal mechanism of the impact process and provide a reference for the design of impact sampling schemes in deep space exploration.关键词
离散元方法/深空探测/小行星/撞击采样/MatDEMKey words
discrete element method/deep space exploration/asteroid/impact sampling/MatDEM分类
天文与地球科学引用本文复制引用
耿焕,朱遥,刘春,张宸玮..基于离散元模拟的小行星微重力撞击采样研究[J].高校地质学报,2024,30(2):196-206,11.基金项目
国家自然科学基金项目(42222707) （42222707）
江苏省研究生科研与实践创新计划项目(SJCX22_0026)联合资助 （SJCX22_0026）
