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NTIS 바로가기韓國海洋工學會誌 = Journal of ocean engineering and technology, v.33 no.5, 2019년, pp.435 - 446
이기남 (국립군산대학교 해양산업공학과) , 김동현 (국립군산대학교 건축해양건설융합공학부) , 김영진 (국립군산대학교 해양산업공학과)
Because offshore structures are affected by various environmental loads, the risk of damage is high. As a result of ever-changing ocean environmental loads, damage to offshore structures is expected to differ from year to year. However, in previous studies, it was assumed that a relatively short per...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
파라미터를 추정하는 방법은 무엇이 있는가? | 0)로 고정한 경우로, 평균풍속을 척도 파라미터로 취급할 수 있어 간편하다. 파라미터를 추정하는 방법으로는 모멘트법(Method of moments), 최우도법(Method of maximum likelihood) 등이 있으며, 본 연구에서는 표본크기가 충분히 클 때 가장 효율적인 방법으로 평가되는 최우도법을 이용하여 상기의 두 가지 이론적 분포의 파라미터를 추정하였다(Jeong et al., 2008). | |
해상풍력발전기의 육상용과는 다른 특징은? | 해상풍력발전기는 육상용과는 다르게 풍 하중뿐만 아니라 수심 및 해저지반 등과 같은 환경적 요인과 조류 및 파랑 등이 바람과 함께 복합적으로 작용한다. 복합하중은 지역에 따라 다르며, 해상풍력발전기를 구성하는 다양한 요소 중 지지구조물에서 복합하중의 대부분을 부담한다. | |
취약 부재의 위치를 선별하여 응력집중계수를 선별한 이유는? | 해상풍력터빈의 하부 조인트와 같이 복잡한 형상을 갖는 부재는 유한요소 상세모델로부터 응답이 산출되어야 하나, 상세 모델의 구조해석은 요구되는 해석시간이 많아 효율적이지 못하다. 따라서 취약 부재의 위치를 선별하여 응력집중계수를 산정하고, 보다 단순화된 유한요소모델로부터 얻은 응답에 적용하는 방법을 이용하였다. |
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