용접구조물의 변형 최소화를 위한 최적 용접순서의 해석적 방법 = Analytical Methodology Obtaining an Optimal Welding Sequence for Least Distortion of Welded Structure

다국어 초록 (Multilingual Abstract)

Several methodologies analyzing welding distortions of large shell structures like ship blocks have been developed and utilized in shipyards for a long times ago. In general, one of objects of thermal distortion analysis is to find welding sequence making least-deformation without any suppliance, and it can be solved easily and rapidly by EP strain-boundary method. But after assembly construction, there are usually more than 10 weldments in each process, and the number of sequence will follow the Factorial calculation. In this research, a method has been suggested to decide the best welding sequence by minimum analysis. Using this method, welding deformation could be reduced just analyzing some cases as many as the number of weldments. Experiments and Analysis of all cases were also done, and their best results are good agreements with predictation by suggested methodology.

참고문헌 (Reference)

1 하윤석, "인코넬 육성용접에 의한 원형 문풀구조 선체블록의 열변형해석" 대한조선학회 49 (49): 304-311, 2012

2 하윤석, "선상가열시 강의 상변태를 고려한개선된 고유변형도 기반의 등가하중법" 대한조선학회 41 (41): 65-74, 2004

3 이장현, "비드의 용용상태를 고려한 가스메탈 아크용접의 3차원 열탄소성변형 해석" 대한조선학회 39 (39): 6-60, 2002

4 하윤석, "대형 용접구조물의 탄소성 열변형 해석을 위한 용접부의 변형률 경계조건에 관한 연구" 대한용접접합학회 29 (29): 48-53, 2011

5 하윤석, "고유변형도를 경계조건으로 갖는 대형 각(殼) 구조물열변형 해석법 개발" 대한조선학회 45 (45): 93-100, 2008

6 하윤석, "강판-대기 온도차에 의한 선체블록 주판의 부가 면외변형 추정" 대한조선학회 49 (49): 222-226, 2012

7 Kang, J.G., "Numerical analysis of induction heating for the application of line heating" 37 (37): 110-121, 2000

8 Hwang, J.H., "Free Surface Procedure for Lifting Operation by Parallel Connected Floating Cranes using Synchronized Operation System and Its Applications to Lifting Operations of a Heavy Cargo" 97-106, 2009

9 Heo, H.Y., "Develpment of Automatic Computer-Aided Engineering System for Weld Distortion Analysis in Ship Production" 2007

10 Ha, Y.S., "An Improved Inherent Strain Analysis for Plate Bending by Line Heating Considering Phase Transformation of Steel" 7 (7): 139-144, 2007

11 오창식, "ABAQUS를 이용한 수소확산 해석" 대한기계학회 33 (33): 600-606, 2009

12 Song, Y.S., "A Study on the Prediction of Paint Dry Time at Ship Block's Inner Wall Placed in the Paint Dry Facility Adopting the Hot Air Supply System" 75-81, 2011

13 Jang, C.D., "A Study on the Prediction and Control of Welding Deformations of Ship Hull Blocks" 37 (37): 127-136, 2000

14 Ha, Y.S., "A Study for Remained Efficiency of Correction Heating after Block Lifting" 118-125, 2008