Optimized High-order Finite-difference Modeling of Second-order Strain Gradient Wave Field Effects
文献类型：期刊论文
| 作者 | Hu, Zi-hao1; Feng, Hai-xin4; Zhou, Zhi-chun2; Li, You-ming3; Whang, Zhi-yang1 |
| 刊名 | APPLIED GEOPHYSICS
 |
| 出版日期 | 2023-07-15 |
| 页码 | 13 |
| ISSN号 | 1672-7975 |
| 关键词 | Second-order strain gradient Numerical modelling Black widow optimization algorithm Asymmetric elastic wave equation |
| DOI | 10.1007/s11770-023-1021-3 |
| 英文摘要 | The second-order strain gradient wave equation, which is based on the generalized continuum mechanics theory, can enrich the content of classical continuum mechanics theory with the incorporation of the second-order spatial derivative term of displacement. Furthermore, it incorporates scale parameters of the media characteristics to bridge the gap between a micromodel and classical continuum mechanics, thus reflecting the microstructure characteristics within the media. Wang derived a constitutive equation of the single-parameter second-order strain gradient theory using a nonlocal theory and provided a mathematical expression for the second-order strain gradient asymmetric elastic wave equation combined with the geometric equation and differential equation of motion. The second-order strain gradient theory can reflect the smaller-scale effect of seismic wave propagation within the neighborhood of average particle diameter l of the medium. Considering the relatively weak spatial scale effect, the numerical dispersion generated when the difference operator approximates the differential operator can suppress the scale effect. Thus, to accurately describe and analyze the scale effects, the finite-difference operator must be optimized. This paper proposes an improved black window optimization algorithm to obtain optimized finite-difference coefficients and perform numerical modelling based on the second-order strain gradient wave equation. Numerical modelling results reveal that the numerical dispersion is well suppressed, and the smaller spatial scale effects can be clearly observed and extracted from the seismograms. |
| WOS关键词 | SCALE IDENTIFICATION PROCEDURES ; ELASTICITY |
| 资助项目 | [XJZ2023050044] ; [A2309002] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:001032337300001 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111325]  |
| 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 | Whang, Zhi-yang |
| 作者单位 | 1.Beijing Univ Chem Technol, Coll Informat Sci & Technol, Beijing 100029, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Beijing 100191, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 4.China Elect Technol Grp Co, Res Inst 3, Beijing 100015, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Zi-hao,Feng, Hai-xin,Zhou, Zhi-chun,et al. Optimized High-order Finite-difference Modeling of Second-order Strain Gradient Wave Field Effects[J]. APPLIED GEOPHYSICS,2023:13. |
| APA | Hu, Zi-hao,Feng, Hai-xin,Zhou, Zhi-chun,Li, You-ming,&Whang, Zhi-yang.(2023).Optimized High-order Finite-difference Modeling of Second-order Strain Gradient Wave Field Effects.APPLIED GEOPHYSICS,13. |
| MLA | Hu, Zi-hao,et al."Optimized High-order Finite-difference Modeling of Second-order Strain Gradient Wave Field Effects".APPLIED GEOPHYSICS (2023):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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