Predicting parametric rolling in irregular head seas with added resistance taken into account
Predicting parametric rolling in irregular head seas with added resistance taken into account
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DOI：
10.1007/s00773-011-0141-2
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发表时间：
2011-09
影响因子：
2.6
通讯作者：
Jiang Lu;N. Umeda;K. Ma
中科院分区：
文献类型：
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作者：
Jiang Lu;N. Umeda;K. Ma
本文采用时域数值模拟方法研究了不规则头浪中的参数横摇运动。考虑了由于附加阻力引起的速度变化对参数轧制的影响。本文将不规则头浪附加阻力的三种计算方法应用于此问题，并将考虑不规则头浪附加阻力时变的Pinkster方法推广到本文中，以供进一步研究。此外，恢复变化的Froude Krylov分量估计与垂荡和俯仰运动的耦合，水动力效应外推非线性方面的滚转角。最后，通过零航速下的模型试验和仿真研究了参数横摇的“实际非遍历性”，并通过仿真研究了附加阻力的影响。
Parametric rolling in irregular head seas is investigated using numerical simulation in the time domain in this paper. The effect of the change in speed due to added resistance on parametric rolling is taken into account. Three methods of calculating the added resistance in irregular head seas are applied to this problem, and then Pinkster’s method, which considers the time-varying added resistance in irregular head seas, is extended for further investigations in this paper. Furthermore, the Froude–Krylov component of restoring variation is estimated with coupling from heave and pitch motions, and the hydrodynamic effects are extrapolated nonlinearly with regards to roll angle. Finally, the “practical non-ergodicity” of parametric roll is investigated with a model experiment at zero forward speed and using the simulation, and the effect of added resistance is investigated with the simulation.