An matched Z-transform perfectly matched layer absorbing boundary in the numerical modeling of viscoacoustic wave equations

作者：Zhao Jian-Guo^*; Shi Rui-Qi; Chen Jing-Yi; Pan Jian-Guo; Wang Hong-Bin

来源：Acta Geophysica Sinica, 2014, 57(4): 1284-1291.

DOI：10.6038/cjg20140425

• Perfectly matched layer
• Matched Z-transform
• Absorbing boundary
• Viscoacoustic wave equation
• Finite-difference in time-domain

An unsplit matched Z-transform PML (MZT-PML) is introduced in the modeling of viscoacoustic wave equations, and the performance of this technique is validated through time-domain finite-difference modeling. The numerical experiments demonstrate that MZT-PML performs better than the classical PML in high-angle incidence case and well eliminates the low-frequency spurious reflections in this case. Long-time calculation of energy decay shows that MZT-PML is stable up to 10(5) time steps in viscoacoustic wave modeling.

• 出版日期2014-4
• 单位中国石油大学（北京）; 油气资源与探测国家重点实验室