دورية أكاديمية
Two-dimensional time-domain finite-difference modeling for viscoelastic seismic wave propagation
| العنوان: | Two-dimensional time-domain finite-difference modeling for viscoelastic seismic wave propagation |
|---|---|
| المؤلفون: | Fan, Na, Zhao, Lian-Feng, Xie, Xiao-Bi, Ge, Zengxi, Yao, Zhen-Xing |
| المساهمون: | Zhao, LF (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China., Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China., Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA., Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China. |
| المصدر: | SCI ; EI |
| بيانات النشر: | GEOPHYSICAL JOURNAL INTERNATIONAL |
| سنة النشر: | 2016 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Numerical solutions, Elasticity and anelasticity, Seismic attenuation, Wave propagation, INCLUDING SURFACE-TOPOGRAPHY, CONSTANT-Q, SYNTHETIC SEISMOGRAMS, NUMERICAL-SIMULATION, FRACTIONAL LAPLACIAN, RHEOLOGICAL MODELS, ATTENUATION, MEDIA, EFFICIENT, DISPERSION |
| الوصف: | Real Earth media are not perfectly elastic. Instead, they attenuate propagating mechanical waves. This anelastic phenomenon in wave propagation can be modeled by a viscoelastic mechanical model consisting of several standard linear solids. Using this viscoelastic model, we approximate a constant Q over a frequency band of interest. We use a four-element viscoelastic model with a trade-off between accuracy and computational costs to incorporate Q into 2-D time-domain first-order velocity-stress wave equations. To improve the computational efficiency, we limit the Q in the model to a list of discrete values between 2 and 1000. The related stress and strain relaxation times that characterize the viscoelastic model are pre-calculated and stored in a database for use by the finite-difference calculation. A viscoelastic finite-difference scheme that is second order in time and fourth order in space is developed based on the MacCormack algorithm. The new method is validated by comparing the numerical result with analytical solutions that are calculated using the generalized reflection/transmission coefficient method. The synthetic seismograms exhibit greater than 95 per cent consistency in a two-layer viscoelastic model. The dispersion generated from the simulation is consistent with the Kolsky-Futterman dispersion relationship. ; National Natural Science Foundation of China [41174048, 41374065, 41374045] ; SCI(E) ; EI ; ARTICLE ; zhaolf@mail.igcas.ac.cn ; 3 ; 1539-1551 ; 206 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| ردمك: | 978-0-00-384650-8 0-00-384650-4 |
| تدمد: | 0956-540X 1365-246X |
| العلاقة: | GEOPHYSICAL JOURNAL INTERNATIONAL.2016,206(3),1539-1551.; 1451349; http://hdl.handle.net/20.500.11897/494906Test; WOS:000384650400008 |
| DOI: | 10.1093/gji/ggw228 |
| الإتاحة: | https://doi.org/20.500.11897/494906Test https://doi.org/10.1093/gji/ggw228Test https://hdl.handle.net/20.500.11897/494906Test |
| رقم الانضمام: | edsbas.88B12B77 |
| قاعدة البيانات: | BASE |
Full Text Finder | ردمك: | 9780003846508 0003846504 |
|---|---|
| تدمد: | 0956540X 1365246X |
| DOI: | 10.1093/gji/ggw228 |