축대칭 부유구조물을 가지는 부유식 해양구조물의 3차원 지진응답 해석기법 개발
Analysis of Three-dimensional Earthquake Responses of a Floating Offshores Structure with an Axisymmetric Floating Structure
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
A seismic response analysis method for three-dimensional floating offshore structures due to seaquakes is developed. The hydrodynamic pressure exerted on the structure is calculated taking into account the compressibility of the sea water, the fluid-structure interaction, the energy absorption by the seabed, and the energy radiation into infinity. To validate developed method, the hydrodynamic pressure induced by the vibration of a floating massless rigid circular disk is calculated and compared with an exact analytical solution. The developed method is applied to seismic analysis of a support structure for a floating offshore wind turbine subjected to the hydrodynamic pressures induced from a seaquake. Analysis results show that earthquake response of a floating offshore structure can be greatly influenced by the compressibility of fluid, the depth (natural frequencies) of the fluid domain, and the energy absorption capacity of the seabed.
Abstract
A seismic response analysis method for three-dimensional floating offshore structures due to seaquakes is developed. The hydrodynamic pressure exerted on the structure is calculated taking into account the compressibility of the sea water, the fluid-structure interaction, the energy absorption by the seabed, and the energy radiation into infinity. To validate developed method, the hydrodynamic pressure induced by the vibration of a floating massless rigid circular disk is calculated and compared with an exact analytical solution. The developed method is applied to seismic analysis of a support structure for a floating offshore wind turbine subjected to the hydrodynamic pressures induced from a seaquake. Analysis results show that earthquake response of a floating offshore structure can be greatly influenced by the compressibility of fluid, the depth (natural frequencies) of the fluid domain, and the energy absorption capacity of the seabed.
참고문헌 (16)
- Gerwick BC, Jr, "Construction of Marine and Offshore Structures" (2007), CRC Press
- Ambraseys N, "A damaging seaquake", Earthquake Engineering and Structural Dynamics, 13, pp.421~424 (1985)
- Chopra AK., "Earthquake Response Analysis of Concrete Dams. Advanced Dam Engineering for Design, Construction and Rehabilitation", pp.416~465 (1988), Springer
- Fenves G, "Effects of Reservoir Bottom Absorption on Earthquake Response of Concrete Gravity Dams", Earthquake Engineering and Structural Dynamics, 11(6), pp.809~829 (1983)
- Fenves G, "Effects of Reservoir Bottom Absorption and Dam-Water-Foundation Rock Interaction on Frequency Response Functions for Concrete Gravity Dams", Earthquake Engineering and Structural Dynamics, 13(1), pp.13~31 (1985)
- 이진호, "해저지진의 수직지반운동에 의한 부유식 해양구조물의 지진응답 해석기법 개발", 한국지진공학회논문집, 18(6), pp.279~289 (2014), 한국지진공학회
- Lee JH, "Dynamic Response Analysis of a Floating Offshore Structure Subjected the Hydrodynamic Pressures Induced from Seaquakes", Ocean Engineering, 101, pp.25~39 (2015)
- Cook RD, "Concepts and Applications of Finite Element Analysis" (2002), John Wiley & Sons Inc
- Senjanović I, "An explicit formulation for restoring stiffness and its performance in ship hydroelasticity", Ocean Engineering, 35, pp.1322~1338 (2008)
- Fung YC, "A First Course in Continuum Mechanics" (1994), Prentice Hall
- Malvern LE, "Introduction to the Mechanics of a Continuous Medium" (1969), Prentice Hall;
- Hall JF, "Two-dimensional dynamic analysis of concrete gravity and embankment dams including hydrodynamic effects", Earthquake Engineering and Structural Dynamics, 10, pp.305~332 (1982)
- Definition of a 5-MW Reference Wind Turbine for Offshore System Development, "Jonkman J", National Renewable Energy Laboratory, ~, pp.NREL (2009), TP-500-38060
- Modal Dynamics of Large Wind Turbines with Different Support Structures, "Bir G", National Renewable Energy Laboratory, ~, pp.NREL (2008), CP-500-43045
- Dynamic Modeling and Loads Analysis of an Offshore Floating Wind Turbine, "Jonkman JM", National Renewable Energy Laboratory, ~, pp.NREL (2007), TP-500-41958
- Wilson JF., "Dynamics of Offshore Structures" (2003), John Wiley & Sons Inc