ハイブリッド型有限要素法による回転形浮体に働く定常波漂流力の数値解析

概要

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An efficient numerical procedure is described for computing the mean second order wave drift forces on floating axisymmetric bodies in regular waves. It is based on the hybrid finite element technique in potential flow theory. Both far field and near field formulations are employed to derive the expressions for the mean wave drift forces. The axisymmetry of the body geometry is exploited to reduce the computational efforts involved. Results based on the present numerical procedure are compared with previously published analytical solutions for a hemisphere and a uniform cylinder as well as those measured in model tests. The computational results give close agreement with the analytical and experimental ones, thus confirming the validity and accuracy of the present formulation. Some new results are also provided for the mean drift forces on such configurations as a circular dock and a compound circular dock with footing.
1987-11-30