发布时间：2025-04-30

论文名称：Tutorial: Source simulation for 3D poroelastic wave equations

发表刊物：Geophysics

摘要：The choice of seismic sources is an important issue in numerical simulation. To demonstrate the importance of the
seismic source and investigate the wavefields of different seismic sources in a poroelastic medium, we have developed representations of the seismic sources: the force-density source and moment-density source. In the numerical simulation, we use the staggered-grid finite-difference method to discretize the spatial and temporal derivatives.We compare the numerical results of different spatial functions of a seismic source including the delta function and the Gaussian function, and we find that the numerical dispersion can be suppressed by the Gaussian function compared to the delta function. We
compare and evaluate the numerical results for the explosion source, torque source, and force-density source for a 3D
homogeneous poroelastic model, which demonstrates that them different seismic sources generate completely different wavefields. In addition, the three seismic sources are used to generate the response of a 3D-layered poroelastic model to
investigate the reflected waves at the interface. Our numerical results indicate that the fast P-wave, the slow P-wave, and the S-wave give rise to each other at an interface.

合写作者：Yijie Zhang, Jinghuai Gao

卷号：84(6)

页面范围：W33–W45

是否译文：否

发表时间：2019-08-26