船体骨組構造の簡易弾塑性解析

概要

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In order to predict the ultimate strength of framed structure of ship hull subjected to excessive loads such as a wave impact load, the analysis taking account of the elastic-plastic deformations is necessary through loading process up to limit load. However, for highly redundant structure, it tends to occur numerical difficulties in the straightforward calculations because of the nonlinear characteristics, and it may take long computing time to analyze by FEM. In the previous paper, a method of analyzing the strength of framed structures by means of elastic-plastic hinge method was proposed to simplify the analysis and save the computing time. This method is based on the assumptions of the elastic-plastic hinges which are equivalent to elastic-plastic deformation in a member and the elastic beam theory between nodes. In this paper, for the purpose of saving the computing time furthermore, the above mentioned method is simplified by introducing the concept of plastic span points, the linearized relation of moment-rotational angle and the specified locations of elastic plastic hinges.
社団法人日本船舶海洋工学会の論文
1986-03-01