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

  • 제35권6호
  • /
  • Pages.146-154
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  • 2023
  • /
  • 1976-8192(pISSN)
  • /
  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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국내 서해안 파랑 관측자료를 이용한 대표주기 산정 및 최적 확률밀도함수 추정

Estimation of Representative Wave Period and Optimal Probability Density Function Using Wave Observed Data around Korean Western Coast

  • 이욱재 (한국해양과학기술원 해양공간개발.에너지연구부) ;
  • 조홍연 (한국해양과학기술원 해양빅데이터.AI센터) ;
  • 박진호 (한국선급 선박해양기술팀) ;
  • 고동휘 (한국해양과학기술원 해양공간개발.에너지연구부)
  • Uk-Jae Lee (Ocean Space Development and Energy Research Department, Korea Institute of Ocean Science and Technology) ;
  • Hong-Yeon Cho (Marine Bigdata and AI Center, Korea Institute of Ocean Science and Technology, Univ. of Science and Technology) ;
  • Jin Ho Park (Ship and Offshore Technology Team, Korean Register) ;
  • Dong-Hui Ko (Ocean Space Development and Energy Research Department, Korea Institute of Ocean Science and Technology)
  • 투고 : 2023.11.20
  • 심사 : 2023.12.26
  • 발행 : 2023.12.31
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초록

본 연구에서는 서해안 해상기상타워 2기에서 관측된 수면변동자료를 이용하여 해양특성을 구분하는 주요 인자인 첨두주기 Tp와 평균주기 T02와 Tm-1, 0를 산정하고 이상자료의 비율, 상관관계 분석 및 최적 확률밀도함수를 추정하였다. 산정된 대표주기 중 첨두주기의 경우, 이상 자료의 비율은 각각의 지점에서 5.73 %, 0.67 %로 나타났으며, T02는 4.35%, 0.01%, Tm-1, 0는 2.82%, 0.03%로 나타났다. 한편, T02와 Tp 사이의 관계를 분석한 결과 각 지점별로 0.53, 0.63의 관계로 산정됐으며, Tm-1, 0와 Tp의 관계는 각각 1.15, 1.32로 나타났다. T02와 Tm-1, 0는 서로 1.18, 1.22의 관계를 보이고 있었다. 산정된 대표주기의 최적 확률밀도함수를 추정한 결과, Tp는 각각의 지점에서 'Lognormal', 'Normal' 분포를 따르고 있었으며, T02는 'Gamma', 'Normal' 분포, Tm-1, 0는 각각 'Log-normal', 'Normal' 분포가 우세한 것으로 나타났다. 이러한 결과는 서해안을 대상으로 수행되는 파랑 분석에 기초자료로 사용될 수 있을 것으로 판단된다.

In this study, the peak wave period Tp and mean wave period T02 and Tm-1, 0, which are major parameters for classifying ocean characteristics, were calculated using water surface elevation data observed from the second west coast oceanographic and meteorological observation tower. In addition, the ratio of abnormal data, correlation analysis, and optimal probability density function were estimated. In the case of Tp among the calculated representative periods, the proportion of abnormal data was 5.73% and 0.67% at each point, and T02 was 4.35% and 0.01%. Tm-1, 0 was found to be 2.82% and 0.03%. Meanwhile, as a result of analyzing the relationship between T02 and Tp, the relationship was calculated to be 0.53 and 0.63 for each point. The relationship between Tm-1, 0 and Tp was 1.15 and 1.32, respectively, and T02, Tm-1, 0 was 1.18 and 1.22. As a result of estimating the optimal probability density function of the calculated representative period, Tp followed the 'Log-normal' and 'Normal' distributions at each point, and T02 was 'Gamma', 'Normal' distribution and Tm-1, 0 showed that 'Log-normal' and 'Normal' distribution were dominant, respectively. It is decided that these results can be used as basic data for wave analysis conducted on the west coast.

키워드

과제정보

본 연구는 산업통상자원부의 신재생에너지핵심기술개발 사업인 "해상풍력 전주기 HSE 운영지원 모델 개발(과제번호: 20213030020130)"의 일환으로 수행되었습니다. 연구지원에 감사드립니다.

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