大型タンカーのDeck Transverseの座屈強度について

概要

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The buckling strength, resistance against vibrations, and fatigue strength of the transverse member are very important considerations in the designing of very large oil tankers. The authors specifically studied the deck transverse member for buckling strength. Six deck transverse models, three corresponding to the deck transverse members in a 120,000 tons dw oil tanker and the remaining three to those in a 240,000 tons dw oil tanker, were fabricatred and tested to determine the buckling strengths of these transverse members reinforced with tripping brackets. The tripping brackets were provided with different degreses of imperfection, and one model in each group was provided with no such tripping brackets at all. All models indicated the lateral instability but almost no difference in their buckling strengths and their modes of failure. Also, the authors treated each deck transverse member as a compressed beam supported on an elastic foundation and successfully analyzed the buckling behavior of the transverse member. Simple formulas used by the authors to determine the buckling load and failure mode were found highly useful.
社団法人日本船舶海洋工学会の論文