Estimation of roll related hydrodynamic coefficients through the free running model tests
Estimation of roll related hydrodynamic coefficients through the free running model tests
复制标题
通过自由运行模型测试估算与横摇相关的水动力系数
DOI：
10.1109/oceans.2004.1405662
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
C. Lee
中科院分区：
文献类型：
--
作者：
H. Yoon;N. Son;C. Lee
当一艘快速的集装箱船或军舰转弯时，也会发生类似的横摇运动。因此，在船舶水平运动方程中必须考虑横摇效应，才能很好地预测船舶的操纵性。本文提出了一种将系统辨识技术应用于海试或自由运行模型试验数据，确定船舶水动力横摇力矩模型结构并估计其系数的新方法。为了获得应用于该算法的运动数据，研制了大型集装箱船自由航行模型装置，并在湖泊中进行了标准机动试验。通过转圈试验和20-20之字形试验数据建立模型结构，再通过10-10之字形试验对模型结构进行确认。结果表明，通过自由运行的模型试验可以很容易地建立水动力滚动力矩的模型结构，而无需进行大量的圈养模型试验。
When a fast container ship or a naval vessel is turning, comparable roll motions occur. Therefore the roll effect has to be considered in the horizontal equations of motion of the ship to predict the maneuverability well. In this paper, a new method to determine a model structure of hydrodynamic rolling moment acting on a ship and estimate its coefficients by applying the system identification technique to the data of sea trial tests or free running model tests has been proposed. To obtain the motion data to be applied to the proposed algorithm, the apparatus of free running model of a large container ship was developed and the standard maneuvering tests were carried out in a lake. The model structure was built in through the data of the turning circle tests and the 20-20 zig-zag test, and then confirmed through the 10-10 zig-zag test. We conclude that the model structure of hydrodynamic rolling moment can be established easily through the free running model tests without a number of captive model tests.