부유식 해상풍력 시스템의 부유체에 따른 설계 하중 및 동적 특성 비교
iv, 135 p.
Floating Offshore Wind-Turbine (부유식 해상풍력터빈) Spar Platform(원주형 플랫폼) Barge Platform(바지형 플랫폼) Tension Leg Platform(TLP) Fully Coupled Aero-Hydro-Servo-Elastic Response (공력-수력-제어-탄성 연성응답) Blade Element Momentum Theory(블레이드 요소모멘텀 이론) Finite Element Method(유한요소방법) Hydrodynamics(수동역학) Multi-Body Dynamics(다물체동역학) Ocean Wave Height(해양파고) Wave Heading Angle(파도진입각도);
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Fully coupled aero-hydro-servo-elastic analyses of 5 MW floating offshore wind turbines (FOWT) have been conducted considering wind and ocean environments in this study. The present 5 MW FOWT model is based on the 5 MW NREL wind turbine installed on the OC3-Hywind spar, the ITI Energy barge system, MIT-TLP system, and GNU-Semisubmersible system. The effects of ocean wind, Platform motions of six-degrees of freedom (surge, sway, heave, pitch, roll, and yaw), irregular wave conditions are simultaneously considered in the present simulation. Dynamic responses and aerodynamic performance of the FOWT model have been practically calculated in both the time and the frequency domains using the NREL FAST code. According to GL Guidelines 2010, major design load cases (DLC) such as normal wind profile (NWP), extreme operating gust (EOG), extreme wind shear (EWS), extreme direction change (EDC) and extreme coherent gust with direction change (ECD) have been analyzed. In addition, the invasion of the hurricane were considered in parked conditions. Comparison results for typical blade design loads and 6-DOF motions of different floating support platforms including extreme conditions are presented and discussed in detail.