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《应用地球物理(英文版)》 2005-01
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A Meshless Method for Acoustic and Elastic Modeling

Jia Xiaofeng, Hu Tianyue, and Wang Runqiu School of Earth and Space Sciences, Peking University, Beijing 100871, China. School of Resources and Information Technology, University of Petroleum, Beijing 102249, China.  
Wave equation method is one of the fundamental techniques for seismic modeling and imaging. In this paper the element-free-method (EFM) was used to solve acoustic and elastic equations. The key point of this method is no need of elements, which makes nodes free from the elemental restraint. Besides, the moving-least-squares (MLS) criterion in EFM leads to a high accuracy and smooth derivatives. The theories of EFM for both acoustic and elastic wave equations as well as absorbing boundary conditions were discussed respectively. Furthermore, some pre-stack models were used to show the good performance of EFM in seismic modeling.
【Fund】: This research is sponsored by National Natural Science Foundation of China (40274041) Ministry of Science of China "973"Programme(2001CCA02300)
【CateGory Index】: P315.3
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