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Effect of Ship Bow Overhang on water Shipping for Ship Advancing in Regular Head Waves

Journal of Marine Science and Application 2016年第1期15卷 33-40页

作者： Abdeljalil Benmansour Benameur Hamoudi Lahouari Adjlout Department of Maritime Engineering University of Science and Technology of Oran Mohamed Boudiaf Oran 31130 Algeria

This paper presents the results of an experimental investigation dealing with the effect of bow overhang extensions on the quantity of shipping water over the foredeck in case of ships advancing in regular head waves. To perform this investigation, a series of free-running tests was conducted in regular waves using an experimental model of a multipurpose cargo ship to quantify the amount of shipping water. The tests were performed on five bow overhang variants with several combinations of wavelength and ship speed conditions. It was observed that the quantity of shipping water was affected by some parameters such as wavelength, ship speed, and bow shape in terms of an overhang extension. The results show the significant influence of an overhang extension, which is associated with the bow flare shape, on the occurrence of water shipping. These results involve the combined incoming regular waves and model speed.

关键词： water on deck shipped water amount ship model tests bow overhang green water regular head waves

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Numerical Study of Focused Wave Impact on a 2-D Floating Body Using CIP-based Method

Numerical Study of Focused Wave Impact on a 2-D Floating Bod...

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第二十三届全国水动力学研讨会暨第十届全国水动力学学术会议

作者： Xizeng Zhao,Sheng Dong College of Engineering,Ocean University of China,Qingdao 266100,China,

In rough seas,marine structures such as ship,platform,*** experience highly nonlinear phenomena such as slamming,water on deck,wave impact by green water and capsizing due to large-amplitude *** of such wave-body interaction problem is of considerable importance in engineering *** paper uses a constrained interpolation profile(CIP)-based Cartesian grid method to numerically investigate the focused wave impact on a two-dimensional floating body,which is validated against to a newly performed *** the experiment,focused wave is generated and a box-shaped floating body with a superstructure is *** computations on the experiment are performed by the CIP-based Cartesian grid method,in which the THINC scheme(THINC,tangent of hyperbola for interface capturing),is used for interface *** highly nonlinear wave-body interactions,including large amplitude body motions and water on deck are numerically investigated and compared with experimental data. Good agreements are achieved to show the ability of the presented model for extremely nonlinear wave-body interactions.

关键词： Focused wave CIP method Wave-body Interaction water on deck Wave impact

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