论文标题
2D时域声波传播的RBF-FD分析异质介质
RBF-FD analysis of 2D time-domain acoustic wave propagation in heterogeneous media
论文作者
论文摘要
径向基函数生成的有限差异（RBF-FD）是局部强型网状方法的流行变体，不需要节点之间的预定义连接，从而使节点分布适应所考虑的问题变得更加容易。本文研究了在地球地下地震建模的背景下，时间域声波传播的RBF-FD解决方案。通过许多数值测试，从同质到高度均质的速度模型，包括非平滑不规则的地形，我们证明，目前的方法可以进一步概括以解决大规模地震建模和全尺度的地震形式和全波形倒置问题，从而使更复杂的地球物理学观察变得更加强大的地球物理学解释。
Radial Basis Function-generated Finite Differences (RBF-FD) is a popular variant of local strong-form meshless methods that do not require a predefined connection between the nodes, making it easier to adapt node-distribution to the problem under consideration. This paper investigates an RBF-FD solution of time-domain acoustic wave propagation in the context of seismic modeling in the Earth's subsurface. Through a number of numerical tests, ranging from homogeneous to highly-heterogeneous velocity models including non-smooth irregular topography, we demonstrate that the present approach can be further generalized to solve large-scale seismic modeling and full waveform inversion problems in arbitrarily complex models enabling more robust interpretations of geophysical observations
