본 연구에서는 전산유체역학(Computational fluid dynamics)을 이용하여 해상풍력지원선(Service Operation Vessel, SOV)의 갑판교와 거주구의 공역학적 상호작용을 평가하였다. 풍속, 풍향 및 두 구조물 간의 상호 거리를 변경하며 공역학적 계수인 평균 항력 계수 및 양 력 변동 계수와 함께 양력 변동 주기를 확인하였으며, 주위 유동을 분석하였다. 갑판교의 경우 풍속이 증가함에 따른 하중 계수의 변화가 미비하나, 거주구의 경우 일정 풍속 이상에서 평균 항력 계수 및 양력 변동 폭이 증가한다. 또한 상호 거리의 증가에 따른 두 구조물의 평균 항력 계수와 양력 변동 계수의 증가를 확인하였다. 유동장 변화를 통해, 상호 거리가 증가함에 따라 갑판교 상부에 발생하는 양의 압력 분포가 점차 커지는 경향을 확인하였으며, 이로 인해 거주구 상류의 음의 압력 분포는 점차 커짐을 확인하였다. 본 연구 결과를 통 해 전반적으로 해상풍력지원선의 갑판교와 거주구의 하중에 지배적인 인자는 상호 거리, 풍속과 그에 따른 갑판에 의한 후류 영역임을 확인할 수 있었으며, 상호 거리를 고려한 해상풍력지원선의 설계에 도움이 될 수 있을 것으로 기대한다.

For the deckhouse or superstructure, attention is directed to the reduction of vibration from a human susceptibility point of view. The two basic requirements for obtaining a low vibration level in the accommodation are to ensure that excitation forces from propeller and/or main engine are small and to avoid resonance excitation of the hull and superstructure. In recent years increased attention has been directed towards the problems of vibration and noise in deckhouse, which have caused major problems with regard to the environmental quality in the living quarters for crews. Accordingly, in this paper, the characteristic of the vibration of deckhouse of fishing boat, of which the length/height ratio is also relatively high, are studied systematically with regard to the shape and modelling of deckhouse based on finite element method of 1-dimensional, 2-dimensional and 3-dimensional model. This study is divided into 4-part. 1st part is the global deckhouse vibration, 2nd part is the local deckhouse vibration, 3rd part consists of the estimation for stiffness of foundational support and 4th part is the application to TUNA LONG LINER of 416 ton class. For the global vibration analysis, the severity of the vibration depends on the longitudinal shear and bending stiffness of the deckhouse, on the vertical deckhouse support(fore, aft and sides). However, even if the design is technically sound, vibration problems may arise due to vertical or longitudinal hull girder or afterbody resonances. Author applied the method of this study to the analysis of, deep-sea fishing vessel of G.T. 416 ton class with relatively low height and long deckhouse, and investigated the vibrational characteristic of the fishing vessel with earlier structural feature. According to this investigation, the vibration, response of above vessel was confirmed of which main hull and deckhouse behave as one body. It is at the bottom of vibrational trouble which a accommodation part of the fishing vessel is raised, that is the local vibration for side wall, fore-aft wall and deck plate of deckhouse rather than thief fect of fore-aft vibration of deckhouse for above fishing vessel. and the resonance of main hull, deckhouse and driving system such as the main engine, propeller in exciting source is mainly brought up as the trouble.