ジャッキ・アップ・リグの遷移行列法を利用した強度解析

概要

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A new method for analyzing the strength of jack-up rigs is proposed. In this paper, we deal a platform with the plane grid structure being supported by the equivalent springs at the junction points between platform and legs and suffering the equivalent loads at the same points. The expressions for the equivalents springs and those for the equivalent loads are obtained by applying the transfer matrix method to the analysis of legs. After we have obtained the displacements of junction points, the bending moments, shearing forces, axial forces and torsional moments of line legs can be calculated at once by the transfer matrix method and then the axial force caused in each member of the actual legs can be obtained by the way shown in our previous paper. The present method has been introduced from the improvement of our previous paper and gives practically sufficient results in shorter computer time of about 1/5〜1/10 in comparison with our previous method.
社団法人日本船舶海洋工学会の論文
1985-08-24