预报船舶在波浪中航行时相对运动的三维模型

PREDICTION OF RELATIVE MOTIONS OF SHIPS IN REGULAR WAVES

船舶首部的相对波面运动是由入射波浪、船舶运动、辐射波、绕射波和定常兴波诸分量组成。本文运用三维源汇法求解有航速的速度势的定解问题,利用航速的修正得到了基本解,求出了首部的相对运动的各分量。计算所得的总的相对运动量与实验结果的比较,甚为吻合。

The total relative motion in the bow region of a ship consists of components that include the ship motions itself and the motions caused by the incident waves, the radiated waves and the diffracted waves as well as the waves due to the steady forward speed. The relative motion components of ships are predicted using a 3-D potential theory. A fast algorithm is presented for computation of 3-D ship relative motions at a moderate forward speed. The Green functions are separated into two terms. One is the Green function in the zero Speed case, another is an added term due to the forward speed. The numerical results are in good agreement with the experimental data.