A Study on the Dynamic Analysis of Mooring System During Hook-up Installation
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
This study evaluated the Hook-up installation of an offshore site construction process, which is the final step in an offshore site installation process. During Hook-up installation, the offshore structure can have a detrimental effect on the work stability due to low-frequency motion. Moreover, economic costs can be incurred by the increase in available days of a tugboat. Therefore, this study developed a numerical analysis program to assess the dynamic behavior of mooring systems during hook-up installation to analyze the generally performed installation process and determine when the tugboat should be released. In this program, the behavior of an offshore structure was calculated using Cummin’s time-domain motion equation, and the mooring system was calculated by Lumped mass method (LMM). In addition, a tugboat algorithm for hook-up installation was developed to apply the Hook-up procedure. The model used in the calculations was the barge type assuming FPSO (Floating production storage and off-loading) and has a taut mooring system connected to 16 mooring lines. The results of the simulation were verified by comparing with both MOSES, which is a commercial program, and a calculation method for restoring coefficient matrix, which was introduced by Patel and Lynch (1982). Finally, the offset of the structure according to the number of tugboats was calculated using the hook-up simulation, and the significant value was used to represent the calculation result.
Abstract
This study evaluated the Hook-up installation of an offshore site construction process, which is the final step in an offshore site installation process. During Hook-up installation, the offshore structure can have a detrimental effect on the work stability due to low-frequency motion. Moreover, economic costs can be incurred by the increase in available days of a tugboat. Therefore, this study developed a numerical analysis program to assess the dynamic behavior of mooring systems during hook-up installation to analyze the generally performed installation process and determine when the tugboat should be released. In this program, the behavior of an offshore structure was calculated using Cummin’s time-domain motion equation, and the mooring system was calculated by Lumped mass method (LMM). In addition, a tugboat algorithm for hook-up installation was developed to apply the Hook-up procedure. The model used in the calculations was the barge type assuming FPSO (Floating production storage and off-loading) and has a taut mooring system connected to 16 mooring lines. The results of the simulation were verified by comparing with both MOSES, which is a commercial program, and a calculation method for restoring coefficient matrix, which was introduced by Patel and Lynch (1982). Finally, the offset of the structure according to the number of tugboats was calculated using the hook-up simulation, and the significant value was used to represent the calculation result.
참고문헌 (15)
- The Impulse Response Function and Ship Motions, "Cummins, W. E.", David Taylor Model Basin Washington DC, ~, pp.No. DTMB-1661 (1962)
- Bentley Systems, "MOSES Reference Manual", ~ (2016)
- Berteaux, H.O., "Buoy Engineering" (1976), A Wiley-Interscience
- DNV, "Marine Operations (DNV-OS-H101)", ~ (2011)
- DNVGL, "Position Mooring (DNVGL-OS-E301)", ~ (2018)
- Hwang, Y. L., "Numerical Model Test for Mooring Damping", Proceedings of the 17th International Conference on Offshore Mechanics and Arctic Engineering, OMAE98 (1998)
- Jo, H. J., "A Study on the Effect of Multi-directional Waves Affecting on the Response Characteristics of Floating Structures with Mooring", Ph. D., pp.1991
- 김영식, "극지해양구조물 성능평가를 위한 스펙트럼 기반 시간역 빙하중 생성에 관한 연구", 한국해양공학회지, 32(6), pp.411~418 (2018), 한국해양공학회[DOI]
- 이종현, "Dynamic Analysis of Spar Hull Transportation", 한국마린엔지니어링학회지, 35(6), pp.867~873 (2011), 한국마린엔지니어링학회
- "Transportation & Installation"[URL]
- 박성민, "섬유로프 계류시스템의 크리프 효과가 부유체의 운동응답 및 계류선의 장력 변화에 미치는 영향에 관한 연구", 대한조선학회 논문집, 54(2), pp.151~159 (2017), 대한조선학회[DOI]
- Patel, M. H., "Coupled Dynamics of Tensioned Buoyant Platforms and Mooring Tethers", London Crentre for Marine Technology, 5(4), pp.299~308 (1982)[DOI]
- Song, C. W., "Deep Sea Installation Analysis of Suction Pile with Passive Heave Compensator", Proceedings of Fall Conference of the Korean Society of Ocean Engineers, pp.53~56 (2018)
- Van den Boom, H., "Dynamic Behaviour of Mooring Lines", Proceedings of the BOSS Conference (1985)
- Yoon, S. J., "A Numerical Study for the Tension Characteristics of Fiber Rope Mooring System During Pre-laying Installation", Proceedings of Fall Conference of the Korean Society of Ocean Engineers, pp.57~61 (2018)