원문정보
초록
영어
Due to environmental pollution, regulations on existing petroleum-based fuels are increasing day by day. LNG is in the spotlight as an eco-friendly fuel that does not emit NOx or SOx, but its boiling point is -163°C, so it needs to be handled with care. Materials that can be used at the above temperature are defined by IMO through the IGC Code. Among them, 9% nickel steel has great advantages in yield strength and tensile strength under cryogenic conditions, but it is difficult to use in arc welding such as FCAW for various reasons. This study is a study to apply fiber laser welding to solve this problem. As a previous study, this study conducted a study to find a welding heat source. After performing bead on plate welding, the optimal heat source was derived by analyzing the shape of the bead and adjusting the parameters of the heat source model. In this case, by applying the multi-island genetic algorithm, which is a global optimization algorithm, not the intuition of the researcher, accurate results could be derived in a wide range.
목차
1. 서론
2. 용접 실험
2.1 실험 장비
2.2 용접 시편
2.3 용접 비드 분석
3. 유한요소해석 및 최적화 알고리즘
3.1 Software
3.2 재료물성도출
3.3 유한요소해석모델의 구성
3.4 용접열원모델
3.5 최적화 알고리즘
4. 결과 및 논의
6. 결론
후기
References