Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Development of Wave by Wave Analysis Program using MATLAB

MATLAB을 이용한 개별파 분석 프로그램 개발

  • Choi, Hyukjin (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Jeong, Shin Taek (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Cho, Hong Yeon (Ocean Data Science Division, Korea Institute of Ocean Science & Technology) ;
  • Ko, Dong Hui (Coastal & Environmental Engineering Division, Korea Institute of Ocean Science & Technology) ;
  • Kang, Keum Seok (KEPCO Research Institute)
  • 최혁진 (원광대학교 토목환경공학과) ;
  • 정신택 (원광대학교 토목환경공학과) ;
  • 조홍연 (한국해양과학기술원 해양자료과학실) ;
  • 고동휘 (한국해양과학기술원 연안공학연구본부) ;
  • 강금석 (한국전력공사 전력연구원)
  • Received : 2017.10.10
  • Accepted : 2017.10.18
  • Published : 2017.10.31
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Abstract

In case of observing only wave height and period in the field, various wave characteristics are mainly calculated by wave by wave analysis method. In this paper, an wave by wave analysis program using MATLAB language is developed. It is possible to perform a function such as 1) correction for mean water level, 2) calculation for zero crossing time, 3) calculation for individual wave height, 4) time interval by using zero upcrossing and downcrossing method. The applicability of the developed program to the data of 0.2 second interval observed by using the WaveGuide Radar installed on HeMOSU-1 was examined. Tidal level variation removal and zero crossing time estimation were determined by linear or quadratic interpolation. It was judged that the Goda method was appropriate for calculating individual wave height, and the method proposed in this study seems to be improved through subsequent research. Due to the fineness of the sample, it can be seen that characteristics of representative waves are different from the results calculated by zero upcrossing and downcrossing method.

현장에서 파고와 주기만을 관측한 경우 주로 개별파 분석법을 사용하여 다양한 파랑 특성을 산정한다. 본 논문에서는 MATLAB 언어를 이용하여 개별파 분석 프로그램을 개발하였다. 영점 상향 교차법과 영점 하향 교차법을 이용하여 1) 평균해면 보정, 2) 영점 교차 시간 산정, 3) 개별파고 산정, 4) 자료 관측기간 변화 등의 기능을 수행할 수 있다. 해모수 1호에 설치된 레이더(WaveGuide Radar)를 사용하여 관측된 시간간격 0.2초 자료를 대상으로 개발된 프로그램의 적용성을 검토하였다. 조석성분 제거 및 영점 교차 시간 산정은 선형 혹은 2차원으로 내삽하였다. 개별 파고 산정은 Goda 방법이 적정한 것으로 판단되었으며, 본 연구에서 제안한 방법은 차후 후속 연구를 통하여 개선할 여지가 있는 것으로 판단된다. 대표파의 특징은 샘플의 유한성 등으로 인하여 영점상향교차법과 영점하향교차법으로 산정한 결과가 상이하다는 것을 알 수 있다.

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References

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