Prediction of Welding Distortion during the Assembly Process of Thin Plate Structures (2^<nd> Report) : Influence of Welding Sequence on Welding Distortion

概要

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Welding technology is one of the main joining techniques and used in industry to assemble various products, such as ships, cars, trains and bridges. According to current trend in design, to achieve weight reduction, large structures are made of relatively thin steels with high strength. However, welding distortion in large thin-plate panel structure is usually cased by buckling due to the residual stress. Several mitigation methods, including preheating and thermal tensioning the plate during assembly, have been investigated and used by some fabricators. In this study, an elastic finite element method for predicting the welding distortion of three-dimensional thin-plate structures with considering welding sequence is proposed. In this method, the inherent strain is employed to model the local shrinkage due to welding itself, and the interface element is introduced to simulate the assembly process. The proposed method is applied to study the influence of welding sequence on the distortion of the large thin-plate panel structures during assembly.
社団法人日本船舶海洋工学会の論文
2004-09-25