如果作用在船上的外力矩呈周期性变化，则当横倾力矩与稳性力矩的方向一致时将加剧船舶横摇；当横倾力矩与稳性力矩的方向不一致时将削弱船舶横摇。一般，在这种力矩作用下船舶的摇摆周期和横摇角均会发生改变。 当横倾力矩的作用方向与稳性力矩一致、横倾力矩的周期与船舶的自摇周期一致时，船舶的横摇角会显著增加，即发生谐摇（synchronous rolling），此时船舶摇摆最剧烈，容易导致船舶倾覆。这种情况对船舶极为危险，生产中尽力避免。
本文给出了在大风浪中船舶避免发生横向谐摇的图谱、表册和计算机程序。
This paper provides new graphs, tables and computer programs for avoiding ship synchronous rolling during stormy weather.
再次，利用多尺度法分析船舶在波浪中接近主共振、亚谐共振和超谐共振时的非线性横摇运动，并给出三种共振的近似解。
Moreover, the multiscale method was used to study the main, ultraharmonic and subharmonic resonances of nonlinear rolling in waves, and the approximate solutions of the three resonances were given.
然后模拟了二维矩形液箱做简谐横摇运动引起的液体受迫晃荡，计算结果以箱壁不同高度处的压强时间历经给出，并与实验结果进行了定量比较。
Then, the forced sloshing in a two-dimensional rectangle box is simulated, and the time course of pressure at different height of the wall was gotten and compared with that of experimental result.
应用推荐