トリム時の船体操縦微係数の推定

概要

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To investigate the manoeuvring characteristics of ship, we have well known the available theories, in the use of slender body theory or low aspect ratio lifting surface theory, for predicting the hydrodynamic force and moment acting on ship hull. But we can't almost see the work which dealt with the hydrodynamic ones acting on ship hull in trimmed condition, notwithstanding the manoeuvring characteristics of ship are greatly affected by her load condition. In this paper, it was made clear the relations between hydrodynamic derivatives on ship manoeuvring and ship's load condition by the use of slender body theory. With these numerical results, we may coclude that the hydrodynamic derivatives on ship manoeuvring are greatly affected by trim quantity, however there are no influence of change of draft at a fixed trimmed condition. And the numerical results, we may represent the following approximate formulae for predicting the hydrodynamic derivatives on ship manoeuvring in trimmed condition. [numerical formula][numerical formula][numerical formula][numerical formula] where d_m and τ represent the mean draft and trim quantity respectively, [numerical formula].
社団法人日本船舶海洋工学会の論文
1978-03-15