A study of damping factors in perfectly matched layers for the numerical simulation of seismic waves

作者：Yang Hao Xing; Wang Hong Xia^*

来源：Applied Geophysics, 2013, 10(1): 63-70.

DOI：10.1007/s11770-013-0361-9

• simulation of seismic wave
• perfectly matched layer (PML)
• damping factor

When simulating seismic wave propagation in free space, it is essential to introduce absorbing boundary conditions to eliminate reflections from artificially truncated boundaries. In this paper, a damping factor referred to as the Gaussian damping factor is proposed. The Gaussian damping factor is based on the idea of perfectly matched layers (PMLs). This work presents a detailed analysis of the theoretical foundations and advantages of the Gaussian damping factor. Additionally, numerical experiments for the simulation of seismic waves are presented based on two numerical models: a homogeneous model and a multi-layer model. The results show that the proposed factor works better. The Gaussian damping factor achieves a higher Signal-to-Noise Ratio (SNR) than previously used factors when using same number of PMLs, and requires less PMLs than other methods to achieve an identical SNR.

• 出版日期2013-3
• 单位中国人民解放军国防科学技术大学