대한용접접합학회:학술대회논문집 (Proceedings of the KWS Conference)
- 대한용접접합학회 2009년 추계학술발표대회
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- Pages.97-97
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- 2009
PCTC 박판 블록 용접 변형에 관한 연구
A Study on Welding Deformation of thin plate block in PCTC
- Kang, Serng-Ku (Production Technology Research Team, Shipbuilding & Offshore Research Institute, STX Offshore & Shipbuilding Co., Ltd.) ;
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Yang, Jong-Su
(Production Technology Research Team, Shipbuilding & Offshore Research Institute, STX Offshore & Shipbuilding Co., Ltd.) ;
- Kim, Ho-Kyeong (Production Technology Research Team, Shipbuilding & Offshore Research Institute, STX Offshore & Shipbuilding Co., Ltd.)
- 발행 : 2009.11.26
초록
The use of thin plate increases due to the need for light weight in large ship. Thin plate is easily distorted and has residual stress by welding heat. Therefore, the thin plate should be carefully joined to minimize the welding deformation which costs time and money for repair. For one effort to reduce welding deformation, it is very useful to predict welding deformation before welding execution. There are two methods to analyze welding deformation. One is simple linear analysis. The other is nonlinear analysis. The simple linear analysis is elastic analysis using the equivalent load method or inherent strain method from welding experiments. The nonlinear analysis is thermo-elastic analysis which gives consideration to the nonlinearity of material dependent on temperature and time, welding current, voltage, speed, sequence and constraint. In this study, the welding deformation is analyzed by using thermo-elastic method for PCTC(Pure Car and Truck Carrier) which carries cars and trucks. PCTC uses thin plates of 6mm thickness which is susceptible to welding heat. The analysis dimension is 19,200mm(length) * 13,825mm(width) * 376mm(height). MARC and MENTAT are used as pre and post processor and solver. The boundary conditions are based on the real situation in shipyard. The simulations contain convection and gravity. The material of the thin block is mild steel with