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.

径向基函数生成的有限差分（RBF-FD）是局部强形式无网格方法的流行变体，不需要节点之间的预定义连接，从而使节点分布更容易适应所考虑的问题。本文研究了在地下地下地震建模的背景下时域声波传播的RBF-FD解决方案。通过从包括非光滑不规则形貌的均质速度模型到非均质速度模型的大量数值测试，我们证明了本方法可以进一步推广到解决任意复杂模型中的大规模地震建模和全波形反演问题，从而实现对地球物理观测的更可靠的解释。