一次元有限要素モデルによる超大型浮体の波浪中構造応答解析

概要

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The stiffness equation of a beam finite element using the dynamic shape function of Bernoulli-Euler beam on an elastic foundation is derived and applied to the dynamic structural response analysis of pontoon-type very large floating structures in waves. The influence of virtual mass distribution, bending stiffness and the decay of amplitude of progressive waves on structural responses is discussed. It has been found that : (1)The reduction of virtual mass of the end part of structures is an effective way to avoid resonance in waves for pontoon-type very large floating structures. (2)The increase of bending stiffness is also effective to reduce structural responses. (3)The quasi-static response at the weather-side end of the structure is reduced by a decrease of amplitude of progressive waves, while passing the structure, whereas the resonance response is hardly affected by it.
社団法人日本船舶海洋工学会の論文