Journal of Korean Society of Coastal and Ocean Engineers (한국해안해양공학회지)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Analysis of 1-D Dispersion Property of ADCIRC Finite Element Model for the Simulation of Tsunami Propagation

지진해일 전파 수치모의를 위한 ADCIRC 유한요소모형의 일차원 분산특성 분석

  • 윤성범 (한양대학교 토목·환경공학과) ;
  • 임채호 (한양대학교 토목·환경공학과) ;
  • 윤기승 (한양대학교 토목·환경공학과) ;
  • 최병호 (성균관대학교 토목·환경공학과)
  • Published : 2003.06.01
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Abstract

Two types of one-dimensional dispersion-correction scheme are developed to take into account the dispersion effects for the simulation of tsunami propagation using ADCIRC finite element model based on shallow-water equations The first is an implicit scheme, and the dispersion-correction is accomplished by controlling the weighting factor assigned to each spatial derivative term of different time levels. The other scheme is explicit and the dispersion is considered by adjusting the element size. The validity of the dispersion-correction scheme proposed in this study is confirmed through the comparison of numerical solutions calculated using the new schemes with analytical ones considering dispersion effect of waves.

천수방정식에 기초한 ADCIRC 유한요소모형을 이용하여 지진해일 전파를 수치모의할 때 분산효과를 고려하기 위한 두 가지 일차원 분산보정기법을 개발하였다. 첫 번째 방법은 음해법으로, 각 시간단계의 공간미분항에 부여되는 가중치를 조정함으로써 분산보정을 수행한다. 두 번째는 양해법으로, 유한요소의 크기를 조정하여 분산을 고려한다. 새로운 기법을 이용하여 계산한 수치해와 파의 분산효과를 고려한 해석해의 비교를 통해 본 연구에서 제안한 분산보정기법의 타당성을 확인하였다.

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References

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