船舶在大风浪中横摇稳性变化的理论研究

对波浪中船舶横摇稳性的特点进行了介绍和分析，提出一种新的研究船舶发生大倾角横摇时的稳性力臂的方法，在运用逐步逼近法计算每个横剖面的左右侧浸深时，考虑了在横摇过程中由于船舶首尾不对称造成的纵倾对每个横剖面浸深的影响，以及横摇过程中所发生的纵倾运动对横摇稳性的影响。然后，根据波浪中重力与浮力平衡、纵倾力矩之和为零这两个条件来求取横摇稳性力臂值。

Theoretical Study Method for Roll Stability of Ships in Waves

In this paper, the characteristics of roll stability of ship are introduced and analyzed, and a study method of stability moment when ship rolls in waves with a big inclination is presented. While calculating the immersed depth of the left and right side of transverse sections with step by step approaching method, the influences on the immersed depth of each transverse section due to the asymmetry between the fore and stern of ship , as well as that on roll stability by trimming during it rolls in waves are taken into account. Finally, the values of roll stability, in accordance with the condition of the balance between gravity and buoyancy of ship in waves and also with that the sum of trim moments is zero are obtained.