Dissipation-preserving simulation for Earth's free oscillations based on symplectic spectral-element method
文献类型：期刊论文
| 作者 | Li BingFei1,3; Li XiaoFan2,3; Li Feng1; Gong Fei1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 64期号:11页码:4022-4030 |
| 关键词 | Earth's free oscillations Earth's interior structure Structure-preserving numerical modeling Non-conservative dynamical system Dispersive attenuation |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2021P0019 |
| 英文摘要 | Earth's free oscillations are three-dimensional standing waves excited by a large earthquake. The study of free oscillations of the Earth has been a vital tool in probing the Earth's internal structure. In this paper, the structure-preserving modeling is extended into the problem of non-conservative dynamical system and a symplectic spectral-element method (SEM) for high-precision and long-time modeling of Earth' s free oscillations with attenuation is presented. A preliminary analysis of the simulation results using our method suggests that the core may have dispersive attenuation. We estimate the dispersive attenuation coefficients and provide a core model with equivalent dispersive attenuation. The results of experiments suggest that it is a practical way to view it as the main cause of the Earth's attenuation, and this approach is suitable for treating questions on the overall perspective of the Earth's inner equivalent heterogeneity. It provides a new choice for the geophysical studies which is related to Earth's free oscillations and enhancing our knowledge of Earth's free oscillations and Earth's inhomogeneity structure. |
| WOS关键词 | SEISMIC-WAVE PROPAGATION ; INNER-CORE ; NORMAL-MODE ; ANISOTROPY ; TOOL |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000751857900016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104938]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Li XiaoFan |
| 作者单位 | 1.China Earthquake Disaster Prevent Ctr, Beijing 100029, Peoples R China 2.China Univ Geosci, Inst Geophys & Geomat, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li BingFei,Li XiaoFan,Li Feng,et al. Dissipation-preserving simulation for Earth's free oscillations based on symplectic spectral-element method[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2021,64(11):4022-4030. |
| APA | Li BingFei,Li XiaoFan,Li Feng,&Gong Fei.(2021).Dissipation-preserving simulation for Earth's free oscillations based on symplectic spectral-element method.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,64(11),4022-4030. |
| MLA | Li BingFei,et al."Dissipation-preserving simulation for Earth's free oscillations based on symplectic spectral-element method".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 64.11(2021):4022-4030. |
入库方式： OAI收割
来源：地质与地球物理研究所
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