The Effect of the Surge Motion and Stability Loss on Parametric Rolling in Longitudinal Waves

被引：0
|
作者：
Lu J. [1 ]
Bu S. [1 ]
Gu M. [1 ]
机构：
[1] China Ship Scientific Research Center, Wuxi
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2020年 / 24卷 / 07期
关键词：
Direct stability assessment; IMO the second generation intact stability criteria; Parametric rolling; Stability loss;
D O I：
10.3969/j.issn.1007-7294.2020.07.005
中图分类号：
学科分类号：
摘要：
The guidelines for direct stability assessment of parametric rolling are currently under development at the International Maritime Organization (IMO) for the second generation intact stability criteria and a reliable mathematical model is necessary. The effect of the surge motion and stability loss on parametric rolling is studied. A surge-heave-pitch-roll coupled equation named as 4 DOF is established for predicting parametric rolling in longitudinal waves. Firstly, heave and pitch motions obtained by a strip method applied to an upright hull with the speed variation due to the surge motion is used to determine the simultaneous relative position of ship to waves in time domain. Secondly, the nonlinear Froude-Krylov roll restoring variation is calculated by integrating wave pressure up to wave surface. Thirdly, the dynamic radiation and diffraction force in head seas and the heel-induced hydrodynamic forces for large heel angle in calm water in following seas are considered in the 4 DOF mathematical model. Finally, the ONR tumblehome vessel is utilized to study the effect of the surge motion and stability loss on parametric rolling. The results show that the effect of the surge motion on parametric rolling with half encounter frequency in longitudinal waves is general small except the critical forward speed of large parametric rolling. The effect of the surge motion and stability loss on parametric rolling with encounter frequency at a high speed in following waves is significant. © 2020, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：885 / 894
页数：9
相关论文
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