Experimental and numerical study on several crucial elements for predicting parametric roll in regular head seas

Experimental and numerical study on several crucial elements for predicting parametric roll in regular head seas
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常规逆海参数横摇预测几个关键要素的实验与数值研究

DOI:
10.1007/s00773-016-0391-0
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发表时间:
2017-03
影响因子:
2.6
通讯作者:
Umeda Naoya
Umeda Naoya
中科院分区:
工程技术4区
文献类型:
--
作者:
Lu Jiang;Gu Min;Umeda Naoya

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国际海事组织目前正在开发参数横摇直接稳定性评估方法,用于第二代完整稳定性标准。为了建立开发准确但足够简单的预测方法的指南,通过执行自由运行模型实验、有或没有浪涌运动的部分约束模型实验以及对 C11 级集装箱船的非耦合横摇模型、耦合纵摇-横摇模型和耦合垂荡-纵摇-横摇模型的数值模拟,研究了在头波中参数横摇建模所需的几个要素。结果,获得以下结果。首先,浪涌对参数横滚的影响一般较小。其次,当参数横滚发生时,升沉和俯仰运动可能具有次谐波分量。第三,将辐射和衍射效应纳入恢复变化可以导致对顶海参数横摇的更保守的预测。最后,与耦合升沉-俯仰-横滚模型相比,使用非耦合横滚模型可以提供更保守但更省时的参数横滚预测。
The methods for direct stability assessment of parametric roll are currently under development at the International Maritime Organization for the second generation intact stability criteria. To establish guidelines for developing accurate, but sufficiently simple prediction method, several elements required for modeling parametric roll in head waves are investigated by executing free running model experiments, partially restrained model experiments with and without surge motion and numerical simulations of uncoupled roll model, coupled surge–roll model and coupled heave–pitch–roll model for a C11 class containership. As a result, the following outcomes are obtained. First, the surge effect on parametric roll is generally small. Second, heave and pitch motions can have subharmonic components when parametric roll occurs. Third, the inclusion of the radiation and diffraction effects on restoring variation can result in more conservative prediction for parametric roll in head seas. Finally, the use of the uncoupled roll model could provide more conservative, but less time-consuming prediction for parametric roll than that of coupled heave–pitch–roll model.
DOI: --
发表时间: 1991
期刊: --
影响因子: --
作者:
I. Boroday
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影响因子: 2.6
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期刊: Journal of the Society of Naval Architects of Japan
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