面内弾性応答及び風の空間相関が超大型浮体-係留系の逐次崩壊に与える影響

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This paper deals with progressive collapse behavior of mooring system of very large floating structure. The floating structure considered in this paper is assumed to be installed in calm sea protected by breakwater and subjected to strong wind. The effect of in-plane elastic response which has been dealt as rigid response on progressive collapse behavior is investigated. It is shown that elastic response slightly reduce the strength of mooring system against progressive collapse. Concerning the modeling of wind, it has been accepted that scale of space fluctuation (scale of turbulence) in typhoon significantly increase the possibility of progressive collapse. We suppose to use dolphin mooring, and modeled it as nonlinear spring with hysterisis effect. It can be concluded that due to redistribution effect through the hysterisis, the mooring system becomes significantly strong against progressive collapse compared without consideration of hysterises effect.
社団法人日本船舶海洋工学会の論文