薄肉球形容器の溶接角変形部に生ずるひずみ集中量の考察 : 溶接継手位置の影響

概要

論文の詳細を見る
In a spherical pressure vessel, some initial distortions occur due to weld angular distortion and so on. In this case, the quantitative determination of an allowable amount of the distortion is very important for a reliability evaluation of the vessel. However, such an analysis is complicated since a large deformation analysis is generally necessary. The authors previously reported a theoretical analysis based on the large deformation theory of plates and shells. This analysis was ,however, applicable only to a simple joint located at the position of the equator of the vessel. In this study, the authors analyzed the joint model with a concave angular distortion at ψ=0°, 22.5°, 45°, 67.5°, 90°(polar) (ψis latitude) by a nonlinear finite element method. It was found that the strain concentration at the distortion part is scarcely influenced by the latitude of a welded joint with the same shape of distortion.
1989-02-25