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논문 기본 정보

자료유형
학술저널
저자정보
Kichan Sim (University of Science & Technology) Kangsu Lee (University of Science & Technology) Byoung Wan Kim (University of Science & Technology)
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제37권 제6호(통권 제175호)
발행연도
2023.12
수록면
273 - 281 (9page)

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Recently, offshore structures for eco-friendly energy, such as wind and solar power, have been developed to address the problem of insufficient land space; in the case of energy generation, they are designed on a considerable scale. Therefore, the scalability of offshore structures is crucial. The Korea Research Institute of Ships & Ocean Engineering (KRISO) developed multi-linked floating offshore structures composed of floating bodies and connection beams for floating photovoltaic systems. Large-scale floating photovoltaic systems are mainly designed in a manner that expands through the connection between modules and demonstrates a difference in structural response with connection conditions. A fluid–structure coupled analysis was performed for the multi-linked floating offshore structures. First, the wave load acting on the multi-linked offshore floating structures was calculated through wave load analysis for various wave load conditions. The response amplitude operators (RAOs) for the motions and structural response of the unit structure were calculated by performing finite element analysis. The effects of connection conditions were analyzed through comparative studies of RAOs and the response’s maximum magnitude and occurrence location. Hence, comparing the cases of a hinge connection affecting heave and pitch motions and a fixed connection, the maximum bending stress of the structure decreased by approximately 2.5 times, while the mooring tension increased by approximately 20%, confirmed to be the largest change in bending stress and mooring tension compared to fixed connection. Therefore, the change in structural response according to connection condition makes it possible to design a higher structural safety of the structural member through the hinge connection in the construction of a large-scale multi-linked floating offshore structure for large-scale photovoltaic systems in which some unit structures are connected. However, considering the tension of the mooring line increases, a safety evaluation of the mooring line must be performed..
#Multi-linked floating offshore structure #Fluid-structure coupled analysis #Connection condition #Pretension #Bending stress

목차

ABSTRACT
1. Introduction
2. Fluid–Structure Coupled Analysis for Multi-Linked Floating Offshore Structures
3. Structural Safety Assessment of Multi-Linked Floating Offshore Structures
4. Analysis of Effect of Connection Methods on Characteristics of Multi-Linked Floating Offshore Structures
5. Conclusion
References

참고문헌 (10)

참고문헌 신청
Chen, C., Duffour, P., Fromme, P., & Hua, X. (2021). Numerically efficient fatigue life prediction of offshore wind turbines using aerodynamic decoupling. Renewable Energy, 178, 1421–1434. https://doi.org/10.1016/j.renene.2021.06.115 google schola Ghigo, A., Faraggiana, E., Sirigu, M., Mattiazzo, G., & Bracco, G. (2022). Design and analysis of a floating photovoltaic system for offshore installation: The case study of Lampedusa. Energies, 15(23), 8804. https://doi.org/10.3390/en15238804 google schola Kim, H.-S., Kim, B. W., & Lee, K. (2022a). Parametric Study on Effect of Floating Breakwater for Offshore Photovoltaic System in Waves. Journal of the Computational Structural Engineering Institute of Korea, 35(2), 109–117. https://doi.org/10.7734/COSEIK. google schola Kim, H., Min, E.-H., Heo, S., & Koo, W. C. (2022b). Motion Analysis of A Wind-Wave Energy TLP Platform Considering Secondorder Wave Forces. Journal of Ocean Engineering and Technology, 36(6), 390–402. https://doi.org/10.26748/KSOE.2022.030 google schola Kim, B. W., Sung, H. G., Kim, J. H., & Hong, S. Y. (2013). Comparison of linear spring and nonlinear FEM methods in dynamic coupled analysis of floating structure and mooring system. Journal of Fluid & Structure, 42, 205–227. https://doi.org/10.1016/j.jfl google schola

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