기구학적 구속 연계 유한요소 해석을 통한 원자로 압력용기노즐 용접부의 잔류응력에 미치는 배관 상호작용의 영향 고찰

In this study, residual stress distributions of the welds in reactor pressure vessel nozzle are calculated by using three-dimensional finite element analysis. The effect of piping interaction on the welding residual stresses is investigated via the kinematic constraint coupling method between continuum finite element and shell finite element. As a result of the investigation, it is found that the piping interaction has a meaningful effect on the residual stress distributions on the inner surface of weld.