外圧を受ける補強円筒殻の全体的圧潰

概要

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Many researches on general instability of ring stiffened cylindrical shell have been published. but the effect of out-of-roundness to the instability have not been clarified at the present time. In order to overcome this difficulty, sixty-one ring stiffened fabricated steel cylinders, forty-three with no out-of roundness (as they were fabricated) and eighteen given a dent extended the overall length of the cylinder, were tested. The given dents were approximately one percent of the cylinder radius in depth. The test results of the cylinders with no out-of-roundness show good correlation with the predicted instability pressure by FEM, the experimental pressure caused the instability were, in average, ninety percent of the predicted pressure. The collapsing pressure of the cylinders with the dent were, in the average, sixty percent of the predicted pressure for perfect cylinders.
社団法人日本船舶海洋工学会の論文