气候变化领域集成服务门户(CCPortal): Lagrangian-based Simulations of Hypervelocity Impact Experiments on Mars Regolith Proxy

CCPortal

DOI	10.1029/2020GL087393
	Lagrangian-based Simulations of Hypervelocity Impact Experiments on Mars Regolith Proxy
	Froment M.; Rougier E.; Larmat C.; Lei Z.; Euser B.; Kedar S.; Richardson J.E.; Kawamura T.; Lognonné P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	Most of the surface of Mars is covered with unconsolidated rocky material, known as regolith. High-fidelity models of the dynamics of impacts in such material are needed to help with the interpretation of seismic signals that are now recorded by SEIS, the seismometer of InSight. We developed a numerical model for impacts on regolith, using the novel Hybrid Optimization Software Suite (HOSS), which is a Lagrangian code mixing finite and discrete element formulations. We use data from hypervelocity impact experiments performed on pumice sand at the NASA Ames Vertical Gun Range to identify and calibrate key model parameters. The model provides insight into the plastic-elastic transition observed in the data and it also demonstrates that gravity plays a key role in the material response. Waveforms for receivers situated vertically below the impact point are correctly modeled, while more research is needed to explain the shallow receivers' signals. © 2020. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	NASA; Seismology; Element formulation; High fidelity models; Hybrid optimization; Hypervelocity impacts; Lagrangian code; Material response; Seismic signals; Surface of Mars; Lagrange multipliers; flow velocity; gravity field; impact; Lagrangian analysis; Mars; numerical model; pumice; regolith; seismograph; simulation; space technology
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170171
作者单位	École Normale Supérieure Paris-Saclay, Cachan, France; Earth and Environmental Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Planetary Science Institute, Tucson, AZ, United States; Université de Paris, Institut de physique du globe de Paris, CNRS, Paris, France
推荐引用方式 GB/T 7714	Froment M.,Rougier E.,Larmat C.,et al. Lagrangian-based Simulations of Hypervelocity Impact Experiments on Mars Regolith Proxy[J],2020,47(13).
APA	Froment M..,Rougier E..,Larmat C..,Lei Z..,Euser B..,...&Lognonné P..(2020).Lagrangian-based Simulations of Hypervelocity Impact Experiments on Mars Regolith Proxy.Geophysical Research Letters,47(13).
MLA	Froment M.,et al."Lagrangian-based Simulations of Hypervelocity Impact Experiments on Mars Regolith Proxy".Geophysical Research Letters 47.13(2020).