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원심모형실험을 이용한 해상풍력발전기 전문설치선의 스퍼드캔 제팅 시스템 성능 분석
조철희(Chul H. Jo),김도엽(Do-Youb Kim),김명주(Myeong-Joo Kim),구찬회(Chan-Hoe Goo) 한국신재생에너지학회 2016 신재생에너지 Vol.12 No.3
Wind energy is an important alternative clean energy source that will contribute to solving the renewable energy needs. In particular, higher wind speeds are available offshore compared to that on land. Therefore the offshore wind power generator can be adopted to generate much power. The wind turbine installation vessel (WTIV) is a new type of mobile jack-up vessel that is designed for the requirements of the offshore wind power industry. The elevating process for the jack-up legs of WTIV can be quite difficult because of the high extraction resistance caused by clay. In soft clay, a high suction force can develope around the spudcan attached to the end of the jack-up legs. Therefore, a jetting system is required to break the suction to pull out the legs. It is important to design a jetting system with an optimized piping and nozzle arrangement to allow easy operation. To evaluate the jetting system performance, it is essential that the model test be performed within the soil base. Spudcan jetting tests were performed in a geotechnical centrifuge. This study introduces the design of the jetting system considering the soft foundation and the centrifuge model test to verify the performance of the spudcan jetting system.