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http://dx.doi.org/10.5000/EESK.2015.19.4.145

Analysis of Three-dimensional Earthquake Responses of a Floating Offshores Structure with an Axisymmetric Floating Structure  

Lee, Jin Ho (Korea Railroad Research Institute, Maglev Train Research Team)
Kim, Jae Kwan (Seoul National University, Department Civil and Environmental Engineering)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.19, no.4, 2015 , pp. 145-159 More about this Journal
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.
Keywords
Floating offshore structure; Floating offshore wind turbine; Fluid-structure interaction; Seaquake; Compressible fluid; Flexible ground;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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