浮遊式海洋人工島の流体連成挙動におけるアンカーの影響に関して

概要

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A unified approach which predicts the stochastic responses of a flexible floating island subjected to wind-waves and seaquakes is presented, taking into account the dynamic interaction effects among a floating island, anchor system and sea water. The floating island is modeled as an elastic circular plate and the anchor system is considered to be composed of tension-legs. Based on a linear potential flow theory, the hydrodynamic pressure generated on the bottom surface of the island is obtained in closed form. The modal equations of motion of the island with or without anchor system is derived by energy method. In the formulation, the dynamic interaction between the island and anchor system is estimated as added tendon stiffness and added tendon excitation, in addition to hydrodynamic added mass, added damping and added stiffness due to dynamic interaction between, the island and sea water. The response quantities are evaluated as root-mean-squared values using a linear random vibration theory. Numerical examples are presented to discuss the effects of anchor arrangement and stiffness on the stochastic responses of flexible floating islands.
一般社団法人日本建築学会の論文
1992-03-20