A new method for numerical dispersion analysis of Laplace-domain 2-D elastic wave equation
文献类型：期刊论文
| 作者 | Chen, Jing-Bo1,2 |
| 刊名 | EXPLORATION GEOPHYSICS
 |
| 出版日期 | 2020-02-11 |
| 页码 | 13 |
| 关键词 | Numerical dispersion modelling finite element |
| ISSN号 | 0812-3985 |
| DOI | 10.1080/08123985.2020.1725385 |
| 英文摘要 | Elastic wave modelling in the Laplace domain is the foundation of Laplace-domain elastic wave full waveform inversion. In order to use Laplace-domain numerical modelling schemes efficiently, appropriate grid intervals must be chosen correctly. The determination of grid intervals is based on numerical dispersion analysis of Laplace-domain elastic wave equation. A new method of numerical dispersion analysis is developed for Laplace-domain 2-D elastic wave equation. The novelty of the method lies in two aspects: (1) Based on the concept of the pseudo-wavelength for both P- and S-waves, I introduce a general quantity which is a combination of the Laplace constant, velocity and grid interval. Therefore, the dispersion relations no longer directly depend on the concrete Laplace constant, velocity and grid interval. Just like the frequency-domain dispersion analysis, a general conclusion with regard to the general quantity can be made; (2) The ratio of numerical eigenvalue to analytical eigenvalue can be interpreted as the normalised attenuation propagation velocity. The number of grid points per S-wave pseudo-wavelength is determined by the accuracy of normalised P- and S-wave attenuation propagation velocities. Based on a commonly used finite-element scheme, the numbers of grid points per S-wave pseudo-wavelength are determined for different Poisson ratios and for different ratios of directional grid intervals. These results are important in applying the finite-element scheme to Laplace-domain elastic wave modelling and full waveform inversion. Comparisons with the analytical solution validate the criterion on the numbers of grid points per S-wave pseudo-wavelength. |
| WOS关键词 | FORM INVERSION ; FINITE-DIFFERENCE ; FREQUENCY-DOMAIN ; SCALAR ; LAYER ; TIME |
| 资助项目 | National Natural Science Foundation of China[41874163] ; National Natural Science Foundation of China[41674132] ; National Key Research and Development Project[2018YFF01013503] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000517932700001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95645]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Chen, Jing-Bo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Jing-Bo. A new method for numerical dispersion analysis of Laplace-domain 2-D elastic wave equation[J]. EXPLORATION GEOPHYSICS,2020:13. |
| APA | Chen, Jing-Bo.(2020).A new method for numerical dispersion analysis of Laplace-domain 2-D elastic wave equation.EXPLORATION GEOPHYSICS,13. |
| MLA | Chen, Jing-Bo."A new method for numerical dispersion analysis of Laplace-domain 2-D elastic wave equation".EXPLORATION GEOPHYSICS (2020):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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