操縦運動時の船体に作用する流体力の推定に関する研究

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For predicting ship manoeuvring performance, it will be very important to estimate the hydrodynamic forces acting on a ship with high accuracy. The hydrodynamic forces can be estimated by the approximate formula as a function of principal particulars of the ship. However, it will be not able to estimate the hydrodynamic forces including the detail hull form such as a frame line by using the approximate formula. Therefore it is necessary to establish the prediction method which can be took into the effect of difference of frame line configuration in order to estimate the hydrodynamic forces more accurately. In this paper, we investigated the hydrodynamic forces acting on three types of model ships which were a cargo ship, a VLCC and a container ship. We combined vortex model with slender body theory and shed the dispersive vortex filaments freely taking into the decay of vortex strength. Furthermore, we defined the parameter "s" which represented the initial location of vortex filament and examined on the relation between the principal particulars of model ships and the value of the parameter "s" to estimate the hydrodynamic forces acting on a ship hull in manoeuvring motion with high accuracy. From the results of numerical calculation in the proposed method, we got the following concluding remarks. As a result of the comparison between the estimated hydrodynamic forces and the measured hydrodynamic forces, we got a good agreement in these results. Furthermore, it is considered that it will be able to discriminate the course stability of ships with high accuracy by using the present method.
社団法人日本船舶海洋工学会の論文
1998-03-29

操縦運動時の船体に作用する流体力の推定に関する研究

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