Simulation Seismic Wave Propagation in Topographic Structures Using Asymmetric Staggered Grids

SUN Wei-tao; YANG Hui-zhu

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Article Navigation > Applied Mathematics and Mechanics > 2004 > 25(7): 686-694

SUN Wei-tao, YANG Hui-zhu. Simulation Seismic Wave Propagation in Topographic Structures Using Asymmetric Staggered Grids[J]. Applied Mathematics and Mechanics, 2004, 25(7): 686-694.

Citation:

SUN Wei-tao, YANG Hui-zhu. Simulation Seismic Wave Propagation in Topographic Structures Using Asymmetric Staggered Grids[J]. Applied Mathematics and Mechanics, 2004, 25(7): 686-694.

Citation:

SUN Wei-tao, YANG Hui-zhu. Simulation Seismic Wave Propagation in Topographic Structures Using Asymmetric Staggered Grids[J]. Applied Mathematics and Mechanics, 2004, 25(7): 686-694.

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Simulation Seismic Wave Propagation in Topographic Structures Using Asymmetric Staggered Grids

SUN Wei-tao^1,2,
YANG Hui-zhu¹

1.
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, P. R. China;

Received Date: 2002-10-25
Rev Recd Date: 2004-03-25
Publish Date: 2004-07-15

Abstract

Abstract

A new 3D finite-difference(FD)method of spatially asymmetric staggered grids was presented to simulate elastic wave pro pagation in to pographic structures.The method approximated the first-order elastic wave equations by irregular grids finite difference operator with second-order time precise and fourth-order spatial precise.Additional intro duced finite difference formula solved the asymmetric problem arisen in non-uniform staggered grid scheme.The method had nointer polation between the fine and coarse grids.All grids were computed at the same spatial iteration.Complicated geometrical structures like rough submarine inter face,fault and nonplanar inter faces were treated with fine irregular grids.Theor etical analysis and numerical simulations show that this method saves consider able memory and computing time,at the same time,has satisfactory stability and accuracy.
- finite difference,
- asymmetric staggered grid,
- seismic wave

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References(16)

References

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