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논문 기본 정보

자료유형
학술저널
저자정보
Seung Ho Yang (Pusan National University) Young Jun Yang (Pusan National University) Sang Beom Lee (Pusan National University) Jitae Do (Pusan National University) Sun Hong Kwon (Pusan National University)
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제27권 제3호
발행연도
2013.6
수록면
53 - 60 (8page)

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초록· 키워드

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A drillship is a representative floating offshore installation. The boom in oil and gas field development has dramatically increased the demands for drillships. Drillships have a moonpool in the center area of the ship for the purpose of drilling. This moonpool has an effect on the seakeeping performance of a drillship in the vicinity of the resonance frequency. Because of the moonpool, drillships act in different resonance modes, called the sloshing mode and piston mode. The objective of this study was to find the moonpool effect on the motion of a drillship through the motion analysis of a currently operating modern compact drillship. The predicted resonance frequencies based on Molin’s theoretical formula, Fukuda’s empirical formula, and BEM?based numerical analysis are compared. The accuracy of the predictions using the theoretical and empirical formulas is compared with the numerical analysis and evaluated. In the case of the piston mode, the difference between the resonance frequency from theoretical formula and the resonance frequency from the numerical analysis is analyzed. The resonance frequency formula for more a complex moonpool geometry such as a moonpool with a cofferdam is necessarily emphasized.

목차

ABSTRACT
1. Introduction
2. Numerical Method
3. Theory of moonpool resonance: Piston mode and Sloshing mode
5. Conclusions and Future Work
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UCI(KEPA) : I410-ECN-0101-2014-550-003351437