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《Chinese Journal of Geophysics》 2000-03
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A STAGGERED-GRID HIGH-ORDER DIFFERENCE METHOD OF ONE-ORDER ELASTIC WAVE EQUATION

DONG LIANG-GUO;MA ZAI-TIAN;CAO JING-ZHONG;WANG HUA-ZHONG; GENG JIAN-HUA;LEI BING;XU SHI-YONG (Laboratory of Marine Geology of NDE, Tongji University, Shanghai 200092, China)  
All methods of seismic wave-field simulation are trying to improve their computational accuracy and efficiency. After transforming the odd higher-order time derivatives of velocity (stress) to spatial derivatives of stress (velocity) in the high-order finite difference method, we can use any order of the temporal and spatial difference accuracy and staggered-grid technique for numerical calculation of the one-order elastic wave equations expressed with velocity and stress. The snapshots and simulated results of an actual model show that this method is more accurate and can decrease the grid dispersion in conventional difference method. Meanwhile, bigger grid space can be used in order to raise the computational efficiency.
【Fund】: 教育部重点科技基金项目和海洋 863-820主题青年基金项目
【CateGory Index】: P631
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