三体船随浪中的完整稳性研究

A Study of Intact Stability of Trimaran-Hull Form in Following Waves

随浪航行波峰位于船中时,容易引起单体船稳性的丧失,但是此结论对三体船是否适用尚待进一步研究。以一条三体船型为例,研究了三体船型在波浪中的完整稳性。对侧体不同位置的多种方案进行了计算。结果表明:当侧体纵向位置位于船舯、船尾和舯前(侧体横向位置较大)时,波浪中的初稳性较静水中反而有所增加,波浪中的大倾角稳性的最大复原力臂也比静水中有所增加,稳性消失角有所减小;当侧体纵向位置位于舯前(侧体的横向位置较小)时,波浪中的初稳性较静水中有所下降,波浪中大倾角稳性的最大复原力臂与静水中比较明显下降。

Mono-hull ships often lost intact stability in following waves when the wave crest is located at the mid-ship. Whether this conclusion is applicable to trimaran should be further studied. In the paper, a typical trimaran has been studied and its intact stability in waves has been calculated. Several kinds of stabilities for trimaran with diffemit side hulls positions have been analyzed. The study shows that when side hulls are located at the middle, the aft and the fore far away from central hull, the initial stabilities in waves are larger than in calm water, the maximum static stability arms for large angle stability in waves are also larger than in calm water, but the angles of vanishing stability are smaller than in calm water. When the side hulls are located at the fore and near the centre hull, the maximum static stability arms for large angle stability in waves are much smaller than in calm water.