大規模浮体の弾性応答低減に関する波数領域での考察

概要

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Elastic response of large floating structures subjected to wind waves is amplified when wet mode frequencies are located in the central region of wave spectrum. Another important aspect of elastic response amplification is the global or local coincidence of wet mode shapes with the distribution profile of hydrodynamic pressure acting on the bottom surface of floating structure. For the purpose of evaluating the latter effect quantitatively, the hydroelastic response of a large circular floating structure is formulated by wet mode superposition in the wave number domain. Numerical results are presented to illustrate the amplification mechanism of global and local deformation of large floating structures. Moreover, the way of controlling wet mode shapes is proposed by adjusting moorings stiffness totally or partially to reduce the overall elastic response.
社団法人日本建築学会の論文
2005-08-30