反復サブストラクチャー法を用いた配管継手の多層溶接シミュレーションの高速化

抄録

Residual stress caused by welding process affects characteristics of strength and fracture of equipment and piping in nuclear power plants. Numerical analysis is powerful tool to evaluate weld residual stress in the actual plants. However, the three-dimensional precise analysis requires enormous computation time. In this study, the finite element analysis code based on iterative substructure method developed to speed up welding simulation was proposed to simulate welding process of the plant equipment and piping such as multi-pass welding, machining and post weld heat treatment. Furthermore, the proposed analysis code was validated by measurements and other analysis results.