A Feasibility Study on Gravity Base Foundations forOffshore Wind Turbine

• Main Authors: Pei-Yu Lee, 李佩諭
• Other Authors: Chi-Fang Chen
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/74787881161599198128

碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 104 === This study proposes innovative solutions, which are based on the analysis of the problems faced in wind farm development in the United Kingdom and Denmark in recent years, to the current difficulties and bottlenecks of domestic and overseas offshore wind power development by integrating industrial and academic viewpoints. Such difficulties and bottlenecks include engineering and technological challenges, construction and purchasing costs, safe interactions between geological and structural features, environmental influence, conditions of the marine engineering industry, and market demand. Furthermore, this study provides alternatives for developing domestic offshore wind power. Therefore, this study use a caisson gravity foundation paired with superstructures and turbines preassembled onshore, transported by towing, and installed by submergence. In sinking installation, the center of buoyancy and gravity meeting will lead the righting moment losing and the pre-assembling offshore wind turbines(POWT)capsizing in slight environmental loading such as wind, current and waves. To avoid and control this risk, a temporal mooring system is needed. A simplified and feasible mooring solution is suggested. And we also use the computational fluid dynamics(CFD)software ANSYS-FLUENT that is applied to simulate the distribution of the velocity, pressure and flow field. Then we can understand the distribution of the underwater foundation, even make advance precautions. In addition, we also do the feasibility assessment of the foundation .This study results indicated that an optimal solution that can enable Taiwan to develop offshore wind power while promoting the domestic marine engineering industry.