3D viscoelastic full waveform inversion of seismic waves for geotechnical site investigation
3D viscoelastic full waveform inversion of seismic waves for geotechnical site investigation
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用于岩土现场调查的地震波 3D 粘弹性全波形反演
DOI：
10.1016/j.soildyn.2019.04.005
复制
发表时间：
2019
影响因子：
4
通讯作者：
Tran, Khiem T.
中科院分区：
文献类型：
--
作者：
Mirzanejad, Majid;Tran, Khiem T.
全波形反演 (FWI) 方法正在成为岩土工程场地调查的有效地球物理工具。它们依靠波传播现象的数学描述来生成合成波场，然后将其与测量的波场相匹配以提取材料特性。由于对波传播现象进行粘弹性处理存在固有的计算挑战，大多数现有的 3D FWI 算法都基于弹性处理，因此忽略了材料的迟弹性行为。本研究的重点是在反演分析中考虑材料的滞弹性效应，以改善反演结果。因此，开发了 3D 粘弹性 FWI 方法并在合成数据集和现场数据集上进行测试。该方法基于 3D 粘弹性波动方程的现有解（有限差分求解器 SOFI3D）和伴随状态反演方法。结果表明，粘弹性波形分析能够表征低速和高速合成层以及真实的可变土层。现场实验得到的横波速度 (Vs) 剖面与侵入式标准渗透测试 (SPT) N 值基本一致，包括低速区的识别。还包括从 3D 弹性 FWI 获得的 Vs 剖面进行比较，粘弹性反演结果在趋势和幅度上与 SPT N 值更加一致。
Full waveform inversion (FWI) methods are becoming efficient geophysical tools for geotechnical site investigation. They rely on a mathematical description of wave propagation phenomena to generate synthetic wave-fields, which are then matched with measured wave-fields for extraction of material properties. Due to the inherent computational challenges in implementing a viscoelastic treatment of the wave propagation phenomena, most of the existing 3D FWI algorithms are based on an elastic treatment, and hence ignore the anelastic behavior of materials. The focus of this study is to account for the anelastic effect of materials in the inversion analysis to improve inverted results. Therefore, a 3D viscoelastic FWI method is developed and tested on synthetic and field datasets. The method is based on an existing solution of 3D viscoelastic wave equations (finite-difference solver SOFI3D) and the adjoint-state inversion approach. The results show that the viscoelastic waveform analysis was able to characterize low- and high-velocity synthetic layers, and real variable soil layers. The S-wave velocity (Vs) profiles from field experiment generally agree with invasive standard penetration test (SPT) N-values, including identification of a low-velocity zone.Vsprofiles obtained from a 3D elastic FWI are also included for comparison, and results from the viscoelastic inversion are more consistent with the SPT N-values in both trend and magnitudes.
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全波形断层扫描解析沙漠冲积层
影响因子：
4
作者：
K. Tran;B. Luke
通讯作者：
B. Luke
通过超声波表面测量研究天然石材的表面蚀变
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
T. Meier;M. Auras;M. Fehr;D. Köhn;L. Cristiano;R. Sobott;I. Mosca;Hans Ettl;Felix Eckel;Tim Steinkraus;E. Erkul;D. Schulte‐Kortnack;K. Sigloch;F. Bilgili;Elena Di Gioia;C. P. Presicce
通讯作者：
C. P. Presicce
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
G. Fabien;E. Gloaguen;B. Giroux
通讯作者：
B. Giroux
影响因子：
3.3
作者：
Warner, Michael;Ratcliffe, Andrew;Bertrand, Alexandre
通讯作者：
Bertrand, Alexandre