超大型半潜水式浮体の構造応答特性と初期構造設計法の考え方

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In this paper, we discuss the characteristics of structural response of semi-submersible V.L.F.S. in waves based on rigorous numerical analysis. In this analysis, hydoroelasticity and hydro-dynamic interactions are fully considered. A guide-line for structural design of semi-submersible V.L.F.S. is proposed after relations between the structural response characteristics and structural configuration are discussed. There are two types of semi-submersible V.L.F.S. proposed. One is column-supported type seen in Kansai Int'l Airport 1st Phase, floating structure plan. V.L.F.S. of this type is supported on columns of large diameter with small depth. It is shown that the response characteristics can be dominated by quasi-static response pointed out by a part of the present author. The other type is column and lower-hull supported model represented by MOB, whose shape is obtained by extending the present semi-submersible rigs of two lower-hulls. It is shown that some of that most important response characteristics with the structure of this type are horizontal bending in low frequencies and structural resonance.
社団法人日本船舶海洋工学会の論文