外圧を受ける鏡板の座屈後限界強度; 板厚の違いによる影響

Post-buckling behaviors of head plates subjected to external pressure; Influence of difference of thickness

月森 和之; 矢田 浩基 ; 安藤 勝訓 ; 一宮 正和*; 安濃田 良成*; 荒川 学*

Tsukimori, Kazuyuki; Yada, Hiroki; Ando, Masanori; Ichimiya, Masakazu*; Anoda, Yoshinari*; Arakawa, Manabu*

バウンダリを形成する構造において、通常設計で防止される座屈圧力を超える過酷荷重に対してバウンダリとしての機能が期待される場合、その限界強度を評価することは重要である。本研究では、外圧を受ける鏡板構造を取り上げ、特に鏡板の板厚の違いが座屈および座屈後限界強度に及ぼす影響等について、水圧による圧力負荷試験およびFEMによる詳細非線形解析を用いて検討を行った。

In case structures form some boundary and are expected to keep some liquid or gas inside its boundary, it is very important to maintain the integrity of its boundary even if the external load becomes severe beyond the design basis level which prohibits buckling of structures. In this study we focused on the head plate structures subjected to external pressure. Pressure loading tests of some head plate test specimens by using hydraulic pressure loading unit were conducted. Also, detailed non-linear FEM analyses were implemented. Buckling behaviors and post-buckling behaviors of head plates, especially the influence of different thickness of test specimens were examined based on the test results and the numerical analysis results.