水波と浮体の相互干渉を考慮した3次元非線形波浪数値水槽の開発

概要

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A Numerical Wave Tank(NWT)for 3-D problems is developed. The motion of an ideal fluid and the motion of a floating body are simulated in a time domain. The Boundary Value Problems(BVP)for velocity field and acceleration field are solved taking into account the interaction between the fluid and floating body motions. The Quadratic Boundary Element Method(QBEM)is used to solve fields. Implicit boundary condition method is used for the acceleration field. Time integration is carried out with the 4th order Runge-Kutta method(RK4). Free surface is updated with the semi-Lagrangian time marchinng scheme. A double-node technique is used for proper treatment of intersections. Some calculations are carried out by a developed new 3-D NWT and the following three results are presented in this paper. 1.The simulation of 3-D waves in a circular wave basin. 2.The simulation of hydrodynamic forces on a sphere in forced heaving motion. 3.The simulation of the free jeaving motion of a sphere in a circular wave basin.
社団法人日本船舶海洋工学会の論文
2000-09-25