Journal of Advanced Marine Engineering and Technology

  • 제40권1호
  • /
  • Pages.75-80
  • /
  • 2016
  • /
  • 2234-7925(pISSN)
  • /
  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
권호 표지
DOI QR코드

DOI QR Code

영역확장법 및 로그격자를 이용한 수치모델링 효율 향상 연구

Improved efficiency of numerical modeling using the expanding domain method with a logarithmic grid

  • Hong, Bo-Ram (Department of Energy & Resources Engineering, Korea Marine and Ocean University) ;
  • Bae, Ho-Seuk (The 6th (Naval Systems) R&D Institute-1, Agency for Defense Development) ;
  • Ha, Wan-Soo (Department of Energy Resources Engineering, Pukyong National University) ;
  • Chung, Woo-Keen (Department of Energy & Resources Engineering, Korea Marine and Ocean University)
  • 투고 : 2015.10.19
  • 심사 : 2015.12.31
  • 발행 : 2016.01.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

유한차분법에 바탕을 둔 수치모델링은 컴퓨터기술의 발전과 함께 다양하게 이용되고 있다. 하지만 대용량의 컴퓨팅 리소스를 필요로 하는 문제를 지니고 있다. 이러한 한계를 극복하기 위해 본 연구에서는 로그격자와 영역확장법을 함께 적용하여 수치모델링 알고리즘을 제안하였다. 기존의 일반적인 등격자 유한차분법과 비교를 통해 알고리즘의 타당성 및 정확성을 검증하였으며, 수치예제를 통해 새롭게 제시된 알고리즘의 계산 효율성을 확인하였다.

Numerical modeling based on the finite difference method has been widely used with improved computer technology. However, high-capacity computing resources are required for this technique. To overcome this limitation, we propose an algorithm the employs a logarithmic grid in conjunction with the expanding domain method. The proposed algorithm was verified through comparison with numerical results obtained with a conventional method. The results confirmed that our algorithm can improve computational efficiency.

키워드

참고문헌

  1. S. Kim, J. Kim, and H. Kim, "A study on characteristics of marine geological structure by numerical modeling of seismic waves," Proceedings of Korean Society of Marine Engineers Conference, p. 122, 2011.
  2. C. S. Cho and H. I. Lee, "Application of convolutional perfectly matched layer method to numerical elastic modeling using rotated staggered grid," Jigu-Mulli-wa-Mulli-Tamsa, vol. 12, no. 2, pp. 183-191, 2009.
  3. J. T. Etgen and M. J. O'Brien, "Computational methods for large-scale 3D acoustic finite-difference modeling: A tutorial," Geophysics, vol. 72, pp. SM223-SM230, 2007. https://doi.org/10.1190/1.2752561
  4. C. Ramsden, G. Bennett, and A. Long, "High-resolution 3D seismic imaging in practice: analysis," The Leading Edge, vol. 24, no. 4, pp. 423-428, 2005. https://doi.org/10.1190/1.1901397
  5. C. Cho and M. Son, "Application of ADE-PML boundary condition to SEM using variational formulation of velocity-stress 3D wave equation," Jigu-Mulli-wa-Mulli-Tamsa, vol. 15, no. 2, pp. 57-65, 2012.
  6. Y. Liu and M. K. Sen, "Advanced finite-difference methods for seismic modeling," Geohorizons, vol. 14, no. 2, pp. 5-15, 2009.
  7. Y. Liu and M. K. Sen, "Advanced finite-difference methods for seismic modeling," Geohorizons, vol. 14, no. 2, pp. 5-16, 2009.
  8. M. Kindelan, A. Kamel, and P. Sguazzero, "On the construction and efficiency of staggered numerical differentiator for the wave equation," Geophysics, vol. 55, pp. 107-110, 1990. https://doi.org/10.1190/1.1442763
  9. W. Ha and C. Shin, "Efficient laplace-domain modeling and inversion using an axis transformation technique," Geophysics, vol. 77, pp. R141-R148, 2012. https://doi.org/10.1190/geo2011-0424.1
  10. S. Choi, D. J. Min, W. Oh, W. Chung, W. Ha, and C. Shin, "Frequency-domain acoustic and elastic modeling and waveform inversion in the logarithmic grid set," Journal of Seismic Exploration, vol. 23, pp. 103-130, 2014.
  11. S. Suh and B. Wang, "Expanding domain methods in GPU based TTI reverse time migration," SEG Technical Program Expanded Abstracts, pp. 3460-3464, 2011.
  12. D. H. Ryu, A. Kim, and W. S. Ha, "Expanding domain method for 3D time-Laplace-domain hybrid modeling," Geosystem Engineering, vol. 18, no. 5, pp. 1-7, 2015. https://doi.org/10.1080/12269328.2014.998346
  13. J. Ji and Y. G. Choi, "3D Seismic data processing methodology using public domain software system," Jigu-Mulli-wa-Mulli-Tamsa, vol. 13, no. 2, pp. 159-168, 2010.
  14. S. H. Jang, C. S. Shin, K. J. Yoon, S. Y. Suh, and S. R. Shin, "A dispersion analysis for minimum grids in the frequency domain acoustic wave equation," Jigu-Mulli-wa-Mulli-Tamsa, vol. 3, no. 2, pp. 39-47, 2000.