Computation of hydrodynamic derivatives related to ship maneuverability in viscous flows
Computation of hydrodynamic derivatives related to ship maneuverability in viscous flows
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粘性流中与船舶操纵性相关的水动力导数的计算
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Liang Dong
中科院分区：
文献类型：
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作者：
Liang Dong
为了预报粘性流中船舶的操纵性，利用商业软件FLUENT分析了与操纵性有关的水动力导数，并充分利用其动网格方法和后处理系统，将船舶运动定义为不同的航向角、舵角、纯横摇、本文将船舶运动方程中的水动力导数和水动力矩用局部坐标系表示，并将水动力导数和水动力矩用局部坐标系表示，结果表明，横摇和偏航水动力与其无量纲频率之间存在良好的线性关系，表明该方法在计算复杂船舶运动水动力导数方面具有上级优势。
In order to predict ship maneuverability in viscous flows,hydrodynamic derivatives related to maneuverability were analyzed using the commercial software FLUENT.Its dynamic mesh method and post-processing system were also fully used.Ship motion can be defined in terms of different heading angles,rudder angles,pure sway,and pure yaw.In this way hydrodynamic forces and moment can be expressed in a local coordinate system.Hydrodynamic derivatives of ship movement equations were calculated by least squares curve fitting.The results showed that the hydrodynamic forces of swaying and yawing and their dimensionless frequencies were well in accordance with a linear relationship,thus this method was found superior for calculating hydro-dynamic derivatives of complicated ship motion.