超大型浮体の波浪中弾性挙動の推定法について : 第2報

概要

論文の詳細を見る
A prediction method of the hydroelastic behaviors of a very large floating structure (VLFS) that may be used for such purposes as an international airport or an offshore city is presented. In the present analysis the structure is divided into a number of small structures and the continuous deformation of the structure is represented by the succession of the discrete displacement of each small structure. Each structure is treated as if it were an independent floating body while the structural constraints are taken into account as additional restoring forces on its motions. The hydrodynamic interactions among the divided structures are accounted for in the evaluation of hydrodynamic forces by the method of Kagemoto & Yue (1986) once their complex motion amplitudes are known. The motion amplitudes are, in turn, determined from the equation of motions which are excited by the hydrodynamic forces. Therefore by solving the equations of hydrodynamic interactions and those of motions simultaneously, the hydroelastic interactions are properly accounted for and the motions of each small structure, which represent the local behaviours of the total VLFS, are determined in one computation. The effect of the present method is discussed by comparing predicted dynamic behaviors of elastic floating structures with their experimental results, and the method can be used to carry out the hydroelastic analysis of a VLFS through several example calculations.