二重底構造の曲げによる挙動

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Double bottom structure is one of the important components in large scale structures, since they carry high loads with relatively light weight. Recently it becomes common that, by virtue of the developments of numerical calculation techniques using computers, this kind of structure is analysed numerically by means of Finite Element Method & c. with huge degree of freedom. In such calculation, however, sufficient knowledge of the structural behaviours is required for proper modelization, such as mesh sizes, types of elements, boundary conditions & c. The requirement tends to be augmented since double bottom structure is expected to be applied to new types of large offshore structures and ships which are subjected to severe specifications. In order to get some knowledges of the behaviours of double bottom structure, the Authors carried out experiment of two types of double bottom structures subjected to lateral load. Applied load was increased beyond the buckling load of the panel, until they collapse. From the data including strains and deflections at various points, variations of the effective width and effctive breadth of the center panel on the compression side are examined. Also studied is the behaviour of the continuous panel of double bottom structures in the compressed side, the result of which show that some of its deflection reverses suddenly against initial deflections by welding. The results are expected to serve as a data for future analysis of this type of structures.
社団法人日本船舶海洋工学会の論文
1988-08-25

二重底構造の曲げによる挙動

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