船舶迎浪航向下的垂荡运动建模与仿真分析

Research on Modeling and Simulation of heave motion of ships in waves

船舶在海上的航行姿态不仅取决于船舶自身动力系统的参数,还与海浪、海风、洋流等因素密切相关,船舶在多个力的作用下不可避免的发生横摇、垂荡、横荡等运动,其中横摇和垂荡是2种最主要的运动方式。船舶大幅度的垂荡运动会使船舶的航行阻力增大,航行的平稳性降低,严重时甚至会导致船舶偏离航线和船舶倾覆事故等。因此,研究船舶垂荡运动,尤其是迎浪航向下的垂荡运动有重要意义。本文结合传统的船舶耦合运动模型,建立了船舶迎浪航向下的运动模型,并进行了船舶垂荡运动的仿真分析,对提高船体稳定性有重要意义。

The ship's attitude at sea is not only determined by the parameters of the ship's own power system, but also closely related to the factors such as wave, sea breeze and ocean current. Large-scale ship heave motion will increase the ship's navigation resistance, reduce the stability of navigation, and even lead to ship deviation from the course of serious accidents and ship capsizing and so on. Therefore, it is important to study the heave motion of ships, especially the heave motion under the heading of waves. Combining with the traditional ship coupled motion model, this paper establishes the ship's downward motion model and carries out the simulation analysis of the ship's heave motion, which is of great significance to improve the stability of the ship.