复原力矩是物理用语，是指船舶受外力作用倾斜时由于重力和浮力的作用点不在同一铅垂线上所产生的使船恢复正态的力矩。以横倾为例，漂浮于水线的船，当重心和浮心不在同一垂线上，重力和浮力形成力偶，促使船回到初始平衡位置，此时的复原力矩为正值。当重力和浮力形成的力偶，促使船继续横倾，此时的复原力矩为负值。
考虑非线性阻尼、非线性复原力矩和随机波浪，建立了随机横浪中船舶运动的随机非线性微分方程。
The random nonlinear differential equation of ship's motion is established considering the nonlinear damping, nonlinear recover moment and random waves.
通过与静水中线性横摇运动的比较，分析非线性阻尼力矩和非线性复原力矩对船舶横摇运动的影响。
In comparison with linear rolling in still water, the effects of nonlinear damping and righting moment on ship's rolling motions were analyzed.
当船舶的重心偏离中线面时，船舶会出现横倾角，该横倾角的存在将使复原力矩减小，稳性降低，对船舶不利。
The angle of list will reduce the righting moment and stability of the ship so as to affect the safety of the ship.
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