Sensitivity Study of Hydrodynamic Derivative Variations on the Maneuverability Prediction of a Container Ship
Sensitivity Study of Hydrodynamic Derivative Variations on the Maneuverability Prediction of a Container Ship
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水动力导数变化对集装箱船操纵性预测的敏感性研究
DOI：
10.1115/omae2015-41490
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
R. Selvam
中科院分区：
文献类型：
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作者：
R. R. Shenoi;P. Krishnankutty;R. Selvam
船舶操纵性的研究涉及到运动方程中水动力导数的确定。通过对运动方程进行积分来模拟标准机动，并检查机动参数是否符合IMO规定的相应标准。数值或实验预测的水动力导数可能与建造和运营船舶的实际值不同。因此，有必要了解这些变化对船舶实际操纵性能的敏感性。本文研究了集装箱船（S175）运动方程中水动力导数的敏感性。所有水动力导数的灵敏度分析是通过使每个导数在−50%至+50%的范围内偏离实验得出的值来进行的，步长为10%。对每种情况进行了舵角、δ = 35°和20°/20° Z字形机动等标准机动试验，并估计了它们对标准机动参数的影响。通过本研究确定了在集装箱船操纵研究中重要且必须高精度估计的水动力导数。Copyright © 2015 by ASME
The study of maneuverability of a ship involves the determination of the hydrodynamic derivatives in the equations of motion. The standard maneuvers are simulated by integrating the equations of motion and the maneuvering parameters are checked for compliance with appropriate standards set by IMO. The numerically or experimentally predicted hydrodynamic derivatives may differ from actual values of the built and operated ship. Hence, it is worth to understand the sensitivity of these variations on the actual maneuvering performance of the ship. This paper deals with a study on the sensitivity of the hydrodynamic derivatives in the equations of motion of a container ship (S175). The sensitivity analysis of all the hydrodynamic derivatives is performed by deviating each derivative in the range of −50% to +50% from the experimentally derived values, in steps of 10%. The standard maneuvering tests like turning tests at rudder angle, δ = 35° and 20°/20° zig-zag maneuvers are performed for each case and their effects on the standard maneuvering parameters are estimated. The hydrodynamic derivatives that are important and which have to be estimated with high level of accuracy in maneuvering studies for a container ship are identified through this study.Copyright © 2015 by ASME