원통형 문풀 구조물의 탑재 시 변형과 수정
Welding Deformation and Its Correction of Cylindrical Moon Pool Structure
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참고문헌
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초록
Turret mooring type Floating Production Storage and Offloading (FPSO) is designed to rotate the hull around a turret system. The system is mounted inside a cylindrical moon-pool structure of the ship hull structure. The upper part of the moon-pool structure called Bogie Support Structure (BSS) is supported on ring type rail structure (bogie), so high roundness is required at the top of the structure. In this study, the deformation measured during BSS installation was compared with the predicted values through the thermal elasto-plastic analysis, and the causes of deformation were analyzed. Deformation behavior of cylindrical structure with a very large diameter compared to the thickness was investigated. In addition, a proper welding sequence and correction method for the deformed structure were proposed. This study can be an example of the solution to the tolerance problem of large cylindrical structures.
Abstract
Turret mooring type Floating Production Storage and Offloading (FPSO) is designed to rotate the hull around a turret system. The system is mounted inside a cylindrical moon-pool structure of the ship hull structure. The upper part of the moon-pool structure called Bogie Support Structure (BSS) is supported on ring type rail structure (bogie), so high roundness is required at the top of the structure. In this study, the deformation measured during BSS installation was compared with the predicted values through the thermal elasto-plastic analysis, and the causes of deformation were analyzed. Deformation behavior of cylindrical structure with a very large diameter compared to the thickness was investigated. In addition, a proper welding sequence and correction method for the deformed structure were proposed. This study can be an example of the solution to the tolerance problem of large cylindrical structures.
참고문헌 (4)
- 하윤석, "인코넬 육성용접에 의한 원형 문풀구조 선체블록의 열변형해석", 대한조선학회 논문집, 49(4), pp.304~311 (2012), 대한조선학회[DOI]
- 김상일, "FPSO선 Moon Pool 구조의 용접변형 해석에 관한 연구", 한국해양공학회지, 17(3), pp.27~32 (2003), 한국해양공학회
- 이주성, "FPSO Moon Pool 구조에서 발생되는 용접 잔류응력에 관한 연구", 대한용접접합학회지, 29(3), pp.326~331 (2011), 대한용접접합학회
- Sattari-Far, I., "Influence of welding sequence on welding distortions in pipes", International Journal of Pressure Vessels and Piping, 85(4), pp.265~274 (2008)