다양한 형상의 Jack-up Leg에 대한 해양 동역학적 수치해석
Numerical Analysis of Hydrodynamic Characteristics for Various Types of Jack-up Legs
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In this study, the hydrodynamic characteristics of various types of jack-up legs for a wind turbine installation vessel were analyzed. Using the modified Morison equation, the wave and current excitation forces on the jack-up legs were calculated. A modal analysis was performedto predict the dynamic responses for various types of jack-up legs. The Newmark-beta time integration scheme was used to solve the equation ofmotion in waves in the time domain. The maximum displacement and maximum bending stress were computed for four different types of legs, andtheir results were compared to select an optimum leg type. Finally, a six-leg jack-up rig with the selected optimal legs was modeled, and its naturalperiod and hydrodynamic behaviors were evaluated.
Abstract
In this study, the hydrodynamic characteristics of various types of jack-up legs for a wind turbine installation vessel were analyzed. Using the modified Morison equation, the wave and current excitation forces on the jack-up legs were calculated. A modal analysis was performedto predict the dynamic responses for various types of jack-up legs. The Newmark-beta time integration scheme was used to solve the equation ofmotion in waves in the time domain. The maximum displacement and maximum bending stress were computed for four different types of legs, andtheir results were compared to select an optimum leg type. Finally, a six-leg jack-up rig with the selected optimal legs was modeled, and its naturalperiod and hydrodynamic behaviors were evaluated.
참고문헌 (14)
- Cassidy, M. J, "Non-linear Analysis of Jack-up Structures Subjected to Random Waves", 박사, pp.1999
- Dawson, T.H, "Offshore Structural Engineering" (1983), Prentice Hall
- Hartnett M.A, "Numerical Evaluation of Hydrodynamic Loadings on Fixed Offshore Structures. Advances in Computational Techniques for Structural Engineering", pp.263~268 (1996), Civil-Comp Press
- 장범선, "해상풍력발전기 전용설치선의 소개", 한국전산구조공학회논문집, 26(2), pp.25~30 (2013), 한국전산구조공학회
- Jamaloddin, N, "Simulation of Wave and Current Force on Template Offshore Structures", Suranaree Journal of Science and Technology, 13(3), pp.193~210 (2005)
- 이의창, "해상풍력발전 설치를 위한 jack-up rig 작업 시 연약지반에 발생하는 지반침하에 관한 연구", 한국마린엔지니어링학회지, 36(8), pp.1136~1142 (2012), 한국마린엔지니어링학회[DOI]
- Malhotra, A.K, "Non Deterministic Analysis of Offshore Structures", Journal of the Engineering Mechanics Division, Proceedings of ASCE, EM6, pp.985~1003 (1970)
- Morison, J.R, "The Forces Exerted by Surface Waves on Piles", Petroleum Transactions, 189, pp.149~154 (1950)
- The Overseas Coastal Area Development Institute of Japan (OCDI), "The Technical Standards and Commentaries for Port and Harbour Facilities in Japan", MLIT, ~ (1999)
- Park, M. S, "Numerical Analysis of the Dynamic Response of an Offshore Platform with a Pile-soil Foundation System Subjected to Random Waves and Currents", Journal of Waterway Port Coasts and Ocean Engineering, 138(4), pp.275~285 (2012)
- Stelson, T.E, "Virtual Mass and Acceleration in Fluids", Proceeding of American Society of Civil Engineering, 81, pp.1~9 (1955)
- Stephen, H.C, "Random Vibration in Mechanical System" (1963), Academic Press Inc
- Williams, M. S, "Non-linear Dynamic Analysis of Offshore Jack-up Units", Computers & Structures, 69, pp.171~180 (1998)
- Zheng, X.Y, "Non-linear Frequency-domain Analysis of Jack-up Platforms", International Journal of Non-linear Mechanics, 39, pp.1519~1534 (2004)