Structure-preserving modeling of teleseismic wavefield using symplectic SEM-FK hybrid method
文献类型：期刊论文
| 作者 | Li BingFei1,2,5; Dong XingPeng3; Li XiaoFan1,5; Si JieGe4 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 62期号:11页码:4339-4352 |
| 关键词 | Symplectic scheme Elastic wave equation Teleseismic wavefield modeling Spectral element method |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2019M0688 |
| 英文摘要 | Teleseismic full-waveform tomography can obtain high resolution velocity structure of upper mantle, and even the structure of mantle transition zone beneath the study area. It has been a vital tool in probing the Earth's internal structure and dynamic process. This method is based on effective forward simulation of seismic wavefield, which requires forward-modeling methods with high accuracy and long-term stability. Under this background, we present a structure-preserving scheme based on symplectic geometric theory, which is specially tailored for teleseismic wave modeling. The spectral element method (SEM) is used to discretize the study area. Without the consideration of the dissipation term, the discretized ordinary differential equation is transformed into a Hamiltonian system, which can be solved numerically by the symplectic-preserving partitioned Runge-Kutta (PRK) method. After adding an extra spatial discretization term into the PRK scheme, we developed a new symplectic scheme with fourth order temporal accuracy. We call the spatial-temporal discretized scheme symplectic SEM (SSEM). We combine SSEM with FK method, which calculates plane wave propagation in one-dimensional layered media. After that, we construct a hybrid method (SSEM-FK) to efficiently calculate teleseismic elastic wave propagation in regional heterogeneous model. Numerical experiments show that SSEM-FK can accurately simulate the propagation of high-frequency teleseismic wavefield in the study area. The advantage of this method in computational efficiency forms the foundation for high-efficient and high-accurate teleseismic full-waveform tomography. |
| WOS关键词 | SPECTRAL-ELEMENT METHOD ; HETEROGENEOUS MEDIA ; 2 KINDS ; DIFFERENCE ; SCHEME ; PROPAGATION ; TIME ; SEISMOGRAMS ; TOMOGRAPHY ; INVERSION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000495446500021 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95702]  |
| 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 | Dong XingPeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.China Earthquake Disaster Prevent Ctr, Beijing 100029, Peoples R China 3.Tsinghua Univ, Dept Math Sci, Beijing 100084, Peoples R China 4.3rd Res Inst CETC, Beijing 100015, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li BingFei,Dong XingPeng,Li XiaoFan,et al. Structure-preserving modeling of teleseismic wavefield using symplectic SEM-FK hybrid method[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(11):4339-4352. |
| APA | Li BingFei,Dong XingPeng,Li XiaoFan,&Si JieGe.(2019).Structure-preserving modeling of teleseismic wavefield using symplectic SEM-FK hybrid method.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(11),4339-4352. |
| MLA | Li BingFei,et al."Structure-preserving modeling of teleseismic wavefield using symplectic SEM-FK hybrid method".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.11(2019):4339-4352. |
入库方式： OAI收割
来源：地质与地球物理研究所
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