FLNG 탑사이드 베어링 노드 후판 맞대기 용접 및 선상 가열 시 강재 구속에 따른 변형에 관한 연구

• Published in: 대한용접·접합학회지 Vol. 42; no. 1; pp. 18 - 26
• Main Authors: 박동희(Dong-Hee Park), 박중구(Jung-Goo Park), 이제명(Jae-Myung Lee)
• Format: Journal Article
• Language: Korean
• Published: 대한용접·접합학회 01.02.2024; 대한용접접합학회
• Subjects: 기계공학; Welding deformation; Thermal deformation; Steel constraint; Welding residual stress; Heat straightening; Line heating; Butt welding
• ISSN: 2466-2232; 2466-2100
• DOI: 10.5781/JWJ.2024.42.1.2

Products manufactured in shipyards are predominantly steel structures, primarily fabricated through welding. There are various welding methods, all of which commonly use very high heat. Therefore, during the fabrication of steel structures, thermal deformation caused by welding occurs, resulting in dimensional deviations from the initial design. Methods to ensure dimensional accuracy include optimizing the welding sequence, predicting thermal deformation before welding and applying reverse-setting, and suppressing thermal deformation through constraints. However, the most commonly used method in the field is heat straightening. This study proposes a method to control thermal deformation caused by welding by using steel constraints during welding and line heating. Analytical verification confirmed both the effect of heat straightening and the variance in effects when steel constraints were applied. As a result, it was confirmed that line heating is effective in correcting thermal deformation, and steel constraints can maximize the effect of line heating. KCI Citation Count: 0