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This research work aims to investigate the gravitational effect of intrusion dynamics in fluidized granular media under low−gravity environments, in order to support engineering applications such as lunar and asteroid exploration, simulation of low−gravity geological processes, and space powder processing technology. Through the drop tower experiment, the gravity−sensitive dependence law of the resistance and the penetration rate correlation when a cylinder moves uniformly through a granular bed was measured. In the 0−1g gravity environments provided by the variable gravity cabinet aboard the Chinese space station, a high−precision Hall sensor array was used to track the trajectory of a single magnetic ball in the vibrating fluidized granular medium. It was found that the resistance significantly increased with the moving speed under 0g conditions, while the rate correlation significantly weakened under 1g condition. Further experimental investigation on the space station revealed a significant dependence of the scaled damping coefficient and the hydrostatic pressure coefficient on gravity. These findings provide important evidence for the mechanics of granular media in asteroid exploration and lunar base construction, and deepen our understanding of particle separation (Brazil fruit effect) and the planetary formation process.
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All rights reserved. Unauthorized reproduction is prohibited., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Meiying HOU, Ke CHENG, Tuo LI, Zhihong QIAO, Jianzhi DING, Xiang LI, Wei SUN), CN=ArticleExt(id=1273334870962069996, articleId=1273334867539517914, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=颗粒介质的侵入动力学重力作用, columnId=1150494642375586098, journalTitle=科技导报, columnName=特色专题, runingTitle=null, highlight=null, articleAbstract=
为探究低重力条件下颗粒介质的侵入动力学及其重力依赖特性,可为月球和小行星探测、模拟低重力地质过程及太空粉末加工技术等工程应用提供支撑。通过落塔实验测量圆柱体匀速穿过颗粒床时的阻力与穿入速率相关性的重力敏感依赖规律,以及在中国空间站变重力柜提供的0~1g不同重力环境中,利用高精度霍尔传感器阵列跟踪单个磁球在振动流化颗粒介质中的运动轨迹,发现阻力在0g条件下随移动速度显著增大,而在1g条件下速率相关性明显减弱;进一步的空间站实验发现标度化阻尼系数和静压力系数存在显著的重力依赖关系。这些发现为小行星探测、月球基地建设中涉及的颗粒介质力学提供了重要依据,并深化了对颗粒分离(巴西果效应)和行星形成过程的理解。
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版权所有,未经授权,不得转载。, copyrightOwner=《科技导报》编辑部, extLink=null, articleAbsUrl=null, sourceXml=LwaVkkiAdnXhqZmFUwtB0w==, magXml=eq+PPs/OD/NV21yEVPNKBw==, pdfUrl=null, pdf=icpQ3bbovMUsWQyO5GvI6g==, pdfFileSize=2329208, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=noETE29zXwByrC5cXvm2cA==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=cXEi9gJdq5MeOeH3euVQEg==, mapNumber=null, authorCompany=null, fund=null, authors=
, authorsList=厚美瑛, 程可, 李拓, 乔志宏, 丁建智, 李响, 孙维)}, authors=[Author(id=1273334871536689662, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1273334867539517914, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=mayhou@iphy.ac.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1273334871612187137, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1273334867539517914, authorId=1273334871536689662, language=EN, stringName=Meiying HOU, firstName=Meiying, middleName=null, lastName=HOU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中国科学院物理研究所,北京 100190, bio={"content":"
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