High-order finite-difference method in seismic wave simulation with variable grids and local time-steps
High-order finite-difference method in seismic wave simulation with variable grids and local time-steps
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发表时间：
2009
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通讯作者：
D. Liang
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作者：
D. Liang
各种地震波模拟方法都是以提高计算精度和效率为目标的。本文将变空间网格和局部变时间步长相结合，提出了一种任意变空间网格和局部变时间步长的高阶有限差分方法。数值结果表明，该方法有效地提高了模拟精度和效率。此外，与传统方法相比，该建模方法对裂缝、溶洞和复杂构造介质中地震波传播的模拟具有优势，能够对此类介质进行详细描述，具有较高的精度和效率。
All the seismic wave simulation methods are aimed to improve the computational accuracy and efficiency.By the combination of variable spatial grids and locally variable time-steps,a high-order finite-difference method with arbitrarily variable spatial grids and local time-steps is presented.The numerical results show that the simulation accuracy and efficiency are raised effectively.Additionally,compared with the traditional method,this modeling method has advantages on the simulation of the seismic wave propagation in the media with fractures,caves and complicated structures,for this method can describe such media in details,and has high accuracy and efficiency.