超大型浮体構造の鉛直曲げ崩壊解析とそれに基づく構造信頼性評価法について

概要

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This paper deals with a study on the collapsing behavior and reliability analysis of very large floating structures(VLFS)in irregular waves. First, a simplified estimation method is presented for collapsing behavior of VLFS by using Smith's method. Stress-strain curves of structural elements, which are used in Smith's method, are obtained by using finite element method considering large deflection and elasto-plastic behavior. Next, a simplified estimation method is shortly introduced for the dynamic response of the structure in irregular waves. Finally, the features of the collapsing behavior and reliability level are investigated by a numerical example applied to a 5, 000m class VLFS under trial design. Effects of statistical values such as reduction of thickness due to corrosion, yield stress and bending rigidity concerning with the expected value of maximum wave bending moment are also investigated by sensitivity analysis.
社団法人日本船舶海洋工学会の論文
2000-09-25