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해양수서생물이 해상풍력 발전시스템의 기초구조에 미치는 영향 및 억제방안에 관한 연구

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Author(s)
홍의용
Issued Date
2014
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000007029
Abstract
In general offshore industry, different foundation types (monopile, jacket,
tripod,floating) can be used for offshore wind turbine to support this structure in
different sea conditions. Recently, the most wind turbines using monopile or
gravity as a foundations, but it can work under less water depths. To overcome
that problems, nowadays choosing a jacket type foundation as a good choice for
the intermediate water depth in 20~50 m. The marine growth formation is one
of the major obstacle in off-shore industry because of reducing the life time and
efficiency. Further more investigation is required to solve this issue.
In this view, this work aimed to investigate the effect of marine growth on
jacket foundation in off-shore wind turbine. For calculating hydrodynamic load, a
jacket foundation was designed using GH Bladed ver 4.2. The effect of marine
growth thickness on the natural frequency of off-shore wind turbine was
investigated using Eigen mode. The results showed that the natural frequency
of off-shore wind turbine reduced due to increasing the marine growth
thickness. Further, also the marine growth effect on different section of jacket
foundation was analyzed . Compared to TP leg and X-brace (M.S.L), the mud
leg showed higher amount marine growth formation. Based on that results, the
bending moment and shear force of jacket foundation at mud leg was analyzed.
It is concluded that marine growth highly affect the bending moment (side to
side mode) and the axial force.
Finally, ZnO nanopaint was developed using ball milling for the prevention of
marine growth. The growth of marine organism on bare and ZnO nanopaint
coatings are examined. The experimental results confirmed that ZnO nanopaint
coatings prevented the grwoth of marin organism. This work showed that the
ZnO nanopaint can be used as a marine growth inhibitor for off-shore wind
turbine applications.
Department
대학원 풍력특성화협동과정
Awarded Date
2015. 2
Table Of Contents
I. 서론 1
1.1 연구배경 및 목적 1
1.2 연구내용 3
(1) Jacket 구조 설계 4
(2) Jacket 구조의 특성 6
II. 연구 배경 이론 9
2.1 Marine Growth(해양수서생물) 9
(1) 해양수서생물의 형태 9
(2) 해양수서생물의 분포 11
2.2 파랑 하중 11
(1) 파랑 하중 이론 11
(2) 파랑 이론 13
2.3 Marine Growth의 동유체(Hydrodynamics)하중 영향 14
(1) 강 부재 지름 및 체적 변위의 변화 15
(2) 항력 및 관성계수의 변화 15
(3) 질량 증가 17
III. 해석 수행 모델 및 하중 조건 설정 19
3.1 해석 수행 풍력 발전기 모델 19
3.2 설계 풍속 20
3.3 설계파랑 20
(1) 설계파고 및 주기 20
(2) 파랑이론의 선정 21
3.4 Marine Growth 두께 선정 21
3.5 항력 및 관성(Drag & Inertia) 계수 22
IV. 하중 분석 결과 및 고찰 24
4.1 고유진동수의 변화 24
4.2 Marine Growth의 Section별[T.P,X-Brace(M.S.L),Mud leg] 영향 26
4.3 타워 아이겐 모드(Eigen mode)에 미치는 Marine Growth 영향 30
4.4 DLC.1.1 Power Production 34
4.5 Marine Growth의 두께 영향 36
4.6 Marine Growth 성장 억제 방안 38
V. 결론 43
참고문헌 45
Degree
Master
Publisher
제주대학교 대학원
Citation
홍의용. (2014). 해양수서생물이 해상풍력 발전시스템의 기초구조에 미치는 영향 및 억제방안에 관한 연구
Type
Dissertation
Appears in Collections:
General Graduate School > Multidisciplinary Graduate School Program for Wind Energy
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