風波と海震に対する浮遊式人工島の繋留システムの最適化

概要

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A probabilistic method is presented to determine the optimized stiffness of mooring system of a flexible floating island subjected to wind-waves and seaquakes. The floating island is idealized as an elastic circular plate with uniformly distributed tension-legs. For a specified return period of external loadings, tensile stresses in the tension- legs are evaluated by a wet- mode superposition approach and stationary random vibration theory, taking account of structural flexibility and fluid-structure interaction. The failure probability of mooring system is separately calculated for wind-waves and seaquakes. Then, the appropriate stiffness of mooring system is selected to satisfy a specified total failure probability against both loadings. Numerical examples are presented to illustrate how to determine the optimized stiffness of mooring system at different offshore sites.
一般社団法人日本建築学会の論文
1995-03-20