基于船舶旋回试验的GM摄动下横摇安全性能分析

Safety performance analysis of rolling under GM perturbation based on ship cycle test

为提高船舶在旋回过程中的操纵安全,以旋回过程中横倾角变化趋势为研究对象,搭建自航模实验平台,进行旋回横摇实验,并配备高精度DGPS设备以获取船舶旋回运动轨迹数据.基于MATLAB软件标绘出的实验中具有横倾角变化的运动轨迹点,以及拟合出的GM与横倾角之间的关系曲线,得出横倾角的变化规律,给出回归公式并验证其可靠性,从而可以根据船舶GM摄动预测船舶操纵安全,为海上航行船舶操纵及海上交通运输提供了参考依据.

In order to improve the maneuvering safety of the ship in the course of turning,taking the change trend of the heel angle in the course of the cycle as the research object,a self-propelled model experiment platform was built to carry out the roll-turning experiment,and a high-precision DGPS device was equipped to obtain the data of the ship’s turning motion track.Based on the trajectory points with the change of the heel angle in the experiment plotted by MATLAB software,and the relationship curve between the GM and the heel angle fitted out,the law of the change of the heel angle was obtained,the regression formula was given and its reliability was verified,so that the ship maneuvering safety can be predicted according to the GM perturbation of the ship,which provides a reference for the ship maneuvering and maritime transportation.