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논문 기본 정보

자료유형
학술저널
저자정보
Jong-Hyun Lee (포항산업과학연구원)
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제25권 제4호
발행연도
2011.8
수록면
1 - 6 (6page)

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초록· 키워드

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The installation of a topside structure can be categorized into the following stages: start, pre-lifting, lifting, lifted, rotating, positioning, lowering, mating, and end of installation. The transfer of the module onto the floating spar hull occurs in the last three stages, from lowering to the end. The coupled multi-body motions are calculated in both calm water and in irregular waves with a significant wave height (1.52 m). The effects of the hydrodynamic interactions between the heavy lifting vessel and the spar hull during the lowering and mating stages are considered. The internal forces caused by the load transfer and ballasting are derived for the mating phases. The results of the internal forces for the calm water condition are compared with those in the irregular sea condition. Although the effect of the pitch motion on the relative vertical motion bet ween the deck of the floating structure and the topside module is significant in the mating phases, the internal force induced pitch motion is too small to have this influence. However, the effect of the internal force on the wave-induced heave responses in the mating phases is noticeable in the irregular sea condition because transfer mass-induced draught changes for the floating structure are observed to have higher amplitudes than the external force induced responses. The impacts of the module on the spar hull in the mating phase are investigated.

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ABSTRACT
1. Introduction
2. Equations of Motion in Time Domain Analysis
3. Numerlcal Computations
4. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2013-559-000315336