Economic and Environmental Geology (자원환경지질)
- Volume 29 Issue 2
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- Pages.183-192
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- 1996
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
An Accuracy Improvement in Solving Scalar Wave Equation by Finite Difference Method in Frequency Domain Using 49 Points Weighted Average Method
주파수영역에서 49점 가중평균을 이용한 scalar 파동방정식의 유한차분식 정확도 향상을 위한 연구
- Jang, Seong Hyung (Dept. of Mineral & Petroleum Eng., HanYang Univ.) ;
- Shin, Chang Soo (Korea Institute of Geology, Mining and Materals) ;
- Yang, Dong Woo (Dept. of Mineral & Petroleum Eng., HanYang Univ.) ;
- Yang, Sung Jin (Dept. of Mineral & Petroleum Eng., HanYang Univ.)
- Received : 1996.02.28
- Published : 1996.04.30
Abstract
Much computing time and large computer memory are needed to solve the wave equation in a large complex subsurface layer using finite difference method. The time and memory can be reduced by decreasing the number of grid per minimun wave length. However, decrease of grid may cause numerical dispersion and poor accuracy. In this study, we present 49 points weighted average method which save the computing time and memory and improve the accuracy. This method applies a new weighted average to the coordinate determined by transforming the coordinate of conventional 5 points finite difference stars to
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