Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Effects of evanescent modes on three-dimensional depression of seabed

3차원 함몰 지형에서 소멸파 성분의 영향

  • Jung, Tae-Hwa (Dept. of Civil Engineering, Hanbat National University) ;
  • Kim, Hyung-Joon (Dept. of Civil and Environmental Engineering, Hanyang University) ;
  • Cho, Yong-Sik (Dept. of Civil and Environmental Engineering, Hanyang University)
  • 정태화 (한밭대학교 토목공학과) ;
  • 김형준 (한양대학교 건설환경공학과) ;
  • 조용식 (한양대학교 건설환경공학과)
  • Published : 2009.12.31
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Abstract

Evanescent modes which are the other solutions of the Laplace equation for the linear dispersion equation may affect the wave transformation especially when a water depth varies abruptly. In this study, the effects of evanescent modes for a three-dimensional depression of seabed are investigated by using the eigenfunction expansion method. A convergence test is first carried out by changing numbers of domains and evanescent modes. The wave transformation for various depressions of seabed is then calculated under condition that the solution of the eigenfunction expansion method is converged.

파랑의 문제에서 진행파 성분 이외에 Laplace 방정식의 또 다른 해인 소멸파 성분은 주로 수심이 급하게 변화할 때 파랑의 변형에 영향을 미친다. 본 연구에서는 고유함수전개법을 사용하여 3차원 함몰 지형에서 파랑의 변형에 대한 소멸파 성분의 영향을 검토하였다. 먼저, 구간의 수와 소멸파 성분의 수에 변화를 주면서 수렴성 검사를 하였으며 다음으로 소멸파 성분을 고려하면서 3차원 함몰지형에서의 파랑변형을 연구하였다.

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References

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