BE-FEハイブリッドモデルを用いた大規模浮体の流力弾性解析における特異点処理

概要

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The hydroelastic analysis of large floating structures with arbitrary shape has been formulated by wet mode superposition approach using BE-FE hybrid model. In our previous paper, boundary integrals are calculated numerically by Gaussian quadrature for both BEs with and without singularities. In this paper, emphasis is placed on the explicit treatment of singularities in quadratic elements using subelement method for BEs with singularities. The analytical results are compared with previous results with respect to diagonal elements of [G] and [H] in the formulation, wet mode frequencies in the fluid-coupled free vibration analysis, and wave pressure distribution and elastic deformation in the hydroelastic response analysis. It is concluded that the explicit treatment of singular integral is essential for evaluating the local distribution of hydrodynamic pressures acting on large floating structures, although it has a small effect on the global hydroelastic responses.
社団法人日本建築学会の論文
2003-03-30