Time-domain finite-element wave form inversion of acoustic wave equation
文献类型：期刊论文
| 作者 | Di, QY; Zhang, MG; Wang, MY |
| 刊名 | JOURNAL OF COMPUTATIONAL ACOUSTICS
 |
| 出版日期 | 2004-09-01 |
| 卷号 | 12期号:3页码:387-396 |
| 关键词 | wave form inversion finite-element method absorbing boundary condition acoustic wave equation time domain |
| ISSN号 | 0218-396X |
| 文献子类 | Article |
| 英文摘要 | The paper derives the finite element equation for acoustic wave in time domain and presents a transparent-plus-attenuation boundary condition. Forward modeling demonstrates that the boundary condition absorbs boundary reflection wave very well. On these bases, we derive the equation satisfied by elements of Jacobi matrix used in the inversion of the physical property parameters of acoustic media. In fact, the equation is the same as that of forward modeling in form. Only the right force item is different. So with the same method of forward modeling, we can get the elements of Jacobi matrix. Because the elements are variable with time and the present inversion does not permit too many unknowns. We integrate the finite elements with the same physical property as one unknown structure unit (for example, a horizontal layer or an oblique layer, etc.) and inverse the physical property parameters of these unknown structure units instead all element's unknown parameters. The method greatly reduces calculation time and saves computer memory. Also, it improves the accuracy of the inversion results and improves the stability of the solving process. The inversion equations are solved with QR decomposition method. Model results prove that the full wave equation inversion method in time domain is effective. |
| WOS关键词 | CROSS-HOLE TOMOGRAPHY ; ELASTIC INVERSION |
| WOS研究方向 | Acoustics ; Mathematics |
| 语种 | 英语 |
| WOS记录号 | WOS:000224819800005 |
| 出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/79619]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Di, QY |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Di, QY,Zhang, MG,Wang, MY. Time-domain finite-element wave form inversion of acoustic wave equation[J]. JOURNAL OF COMPUTATIONAL ACOUSTICS,2004,12(3):387-396. |
| APA | Di, QY,Zhang, MG,&Wang, MY.(2004).Time-domain finite-element wave form inversion of acoustic wave equation.JOURNAL OF COMPUTATIONAL ACOUSTICS,12(3),387-396. |
| MLA | Di, QY,et al."Time-domain finite-element wave form inversion of acoustic wave equation".JOURNAL OF COMPUTATIONAL ACOUSTICS 12.3(2004):387-396. |
入库方式： OAI收割
来源：地质与地球物理研究所
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