高速増殖炉容器の耐震座屈設計法に関する研究 : 第6報,炉容器の座屈後疲労損傷評価に関する研究

概要

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An estimation of fatigue damage derived from buckling deformation is one of the important factors in evaluating the safety margin of seismic design criteria for the thin-walled fast breeder reactor vessel, in addition to estimating the critical buckling strength itself. Displacement response waves of postbuckling state obtained from SDOF models were analyzed from the viewpoint of the fatigue failure mechanism. Cyclic postbuckling fatigue tests were performed on 304 S.S.cylinders to obtain basic fracture data and to simulate the seismic response characteristic by the static approach. Based on these works, fatigue damages were found to be correlated to the maximum global displacement response. Finally, the ultimate state definition in the seismic buckling guideline was confirmed to be sufficiently conservative against the fatigue failure limit.
1996-06-25