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ISSN : 1598-5725(Print)
ISSN : 2093-8470(Online)
Journal of Navigation and Port Research Vol.43 No.6 pp.344-352
DOI : https://doi.org/10.5394/KINPR.2019.43.6.344

Numerical Study on the Coupled Responses of the Steel Lazy Wave Riser (SLWR) Based on the Basis of Design and Moored FPSO

Yong-Ju Kwon*,Bo Woo Nam**,Byeong-Won Park***,Seung-Hoon Oh****, Jae-Hwan Jung*****,Dongho Jung
*Junior Engineer, Korea Research Institute of Ships & Ocean Engineering
**Assistant Professor, Dept. of Naval Architecture and Ocean Engineering, Seoul National University
***,*****Senior Researcher, Korea Research Institute of Ships & Ocean Engineering
****Junior Researcher, Korea Research Institute of Ships & Ocean Engineering
Principal Researcher, Korea Research Institute of Ships & Ocean Engineering

Abstract

A coupled analysis was performed between the riser to develop oil and gas in ultra-deepwater and the moored floating body. In general, the safety of the riser is conservatively evaluated by considering the maximum offset excluding the coupled analysis with the floating body. In this study, the safety of the riser was analyzed by considering the coupled motion analysis of the moored floating body. The riser is considered steel lazy wave riser (SLWR) applied in the deep sea, and the floating body is determined to FPSO. The methodology was presented on coupled and uncoupled analysis. The coupled effects were analyzed according to the incident wave headings in intact and damaged conditions of mooring lines. The tension of mooring lines, the motion of the floating body, and riser responses were analyzed according to the loading conditions.

BoD 기반의 Steel Lazy Wave Riser(SLWR)와 계류된 FPSO와의 연성해석에 관한 수치해석 연구

권용주*,남보우**,박병원***,오승훈****, 정재환*****,정동호
*선박해양플랜트연구소 기술원, **서울대학교 조선해양공학과 조교수, ***,*****선박해양플랜트연구소 선임연구원,****선박해양플랜트연구소 연구원, 선박해양플랜트연구소 책임연구원

초록

초심해역 자원개발용 라이저와 계류된 부유체와의 연성해석을 수행한다. 일반적으로 라이저의 안전성은 부유체와의 연성해석 없이 최대 offset을 고려한 해석을 통해 보수적으로 평가되는데, 본 연구에서는 계류된 부유체의 연성 운동해석을 고려하여 라이저의 안전성을 분석한다. 라이저는 초심해역에 적용되는 SLWR이 고려되며, 부유체는 FPSO가 적용된다. 연성을 고려하는 방법과 고려하지 않는 방법론에 대하여 제시한다. 계류선이 모두 안전한 정상상태(Intact) 조건과 사고(damaged) 조건을 고려하여, 각 조건에서 파랑 입사각도에 따라 연성해석 효과를 분석한다. 하중 조건에 따라 계류선의 장력, 부유체의 운동 및 라이저의 거동 등을 분석한다.

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