摘要
船舶横摇预报准确程度很大程度上取决于横摇阻尼的计算。参数横摇作为一种非线性横摇运动,在数值预报时,横摇阻尼算法对数值结果有很大影响。基于船模自由衰减试验拟合横摇阻尼系数,用一计算船舶回复力及耦合运动的数值程序来预报参数横摇,与试验结果对比,证实了该阻尼计算方法和数值算法的可靠性;进而根据贝尔登公式、渡边公式等计算横摇阻尼,比较不同横摇阻尼计算方法的精度。计算表明,用基于试验获得的横摇阻尼系数计算参数横摇相对可靠;采用其他阻尼系数计算的横摇幅值与试验值均有一定偏差,有些甚至偏差很大。
The accuracy of prediction in ship rolling depends on the calculation of roll damping. Damping coefficient is obtained through experiment, and a new method calculating restoring force is proposed. Based on the method a set of MATLAB program is formed for calculating ship motion. Reliability of the program and the damping coefficient are proved by comparing the results with those from the experiment. Comparing between various methods determining damping, it is shown that the damping determined with experiment is the most reliable.
出处
《中国造船》
EI
CSCD
北大核心
2015年第A01期48-52,共5页
Shipbuilding of China
关键词
参数横摇
横摇阻尼
数值模拟
耐波性
parametric rolling
roll damping
numerical simulation
sea keeping
