Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Analysis of Bragg Reflection with Two-Dimensional Finite Element Method

2차원 유한요소법을 이용한 파랑의 Bragg반사 해석

  • 조용식 (한양대학교 공과대학 토목공학과) ;
  • 정우창 (홍익대학교 공과대학 토목공학과)
  • Published : 2002.12.01
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Abstract

In this study, a finite element model is employed to simulate the diffraction of waves caused by a change of water depths. The model is firstly applied to the estimation of reflection coefficients of monochromatic waves over a sinusoidally varying topography. Predicted coefficients are compared with those of the eigenfunction expansion method and laboratory measurements. A good agreement is observed. The model is then used to investigate effects of heights of bottom topography and number of ripples on variation of reflection coefficients of monocromatic water waves.

본 연구에서는 유한요소법을 이용하여 수심의 변화에 의해 발생되는 파랑의 회절에 대해 수치적 모의실험을 수행하였다. 본 모형은 정현파형 지형을 통과하는 단조파의 반사율을 계산하는데 적용되었다. 계산된 반사율은 고유 함수전개법에 의한 결과와 수리모형실험에 의한 관측결과와 비교하여 본 해석법을 검증하였으며, 이로부터 정현파형 지형의 진폭과 사련의 수의 변화에 대한 반사율의 변화에 적용하여 그의 특성을 조사하였다.

Keywords

References

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