후판 구조의 각변형 예측 및 제어에 관한 연구
A Study on the Prediction and Control of Angular Distortion in Thick Weldments
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초록
The block assembly of ship consists of a series of heat processes such as cutting, bending, welding, residual stress relaxation and fairing. With the fast development of computers, the thermal elasto-plastic analysis method has become a versatile tool for practical applications in the ship production. If numerical analysis is proved to be an advantageous tool to predict the residual deformation due to various heat processes, the optimum methods which can remove the welding distortion can be presented at each assembly stage, which will result in great progress in improving the accuracy of block assembly. In order to minimize the weld-induced angular distortion in thick weldments, this paper proposes the optimum groove design for various plate thickness as the distortion control method. The validity of this method has been substantiated by a number of numerical simulations and experiments.
Abstract
The block assembly of ship consists of a series of heat processes such as cutting, bending, welding, residual stress relaxation and fairing. With the fast development of computers, the thermal elasto-plastic analysis method has become a versatile tool for practical applications in the ship production. If numerical analysis is proved to be an advantageous tool to predict the residual deformation due to various heat processes, the optimum methods which can remove the welding distortion can be presented at each assembly stage, which will result in great progress in improving the accuracy of block assembly. In order to minimize the weld-induced angular distortion in thick weldments, this paper proposes the optimum groove design for various plate thickness as the distortion control method. The validity of this method has been substantiated by a number of numerical simulations and experiments.
참고문헌 (6)
- 김상일, "선체 구조의 용접변형 제어법 개발", 박사, pp.1999
- Kim, S.I., "A Study on the Accuracy Control of Block Assembly in Shipbuilding-simulation of Residual Deformation Due to Fillet Welding", Proceedings of ICCAS-1997, pp.367~381 (1997)
- Lee, S.G., "Modeling of Residual Stress in Thick Section Weldments", 박사, Department of Welding Engineering, pp.1992
- Reports of Transportation Technical Research Institute, Vol 20, "Masubuchi, K.", ~ (1956)
- Ueda, Y., "Applicability of Substituting Plane-deformation Problems for Three-dimensional Thermal Elasto-Plastic Problems", Transactions of the Japanese Welding Society, 6(1), pp.47~59 (1988)
- Ueda, Y., "Simulation of Welding Deformation for Accurate Ship Assembling(1st Report)", Journal of the Society of Naval Architects of Japan, 171, pp.395~404 (1992)