Experimental study on coupling feature of the vortex-induced motion of floating platform with two typical cross-section columns

被引：0

作者：

Wei D.-Z. ^{[1
]}

Que X.-L. ^{[1
]}

Yang C.-B. ^{[1
]}

Bai X.-L. ^{[2
]}

机构：

[1] School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan

[2] School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan

来源：

Wei, Dong-Ze (wei_dz@126.com) | 1600年 / China Ship Scientific Research Center卷 / 25期

关键词：

Column; Experiment; Platform; Vortex-induced motion;

D O I：

10.3969/j.issn.1007-7294.2021.03.004

中图分类号：

学科分类号：

摘要：

The effects of the column shape and current incidence headings on vortex-induced motion(VIM) of a floating platform were studied based on the model test, and the coupling features between yaw, sway and surge motions were also mostly analyzed, the results of which show that the column shape and current incidence angle have significant effects on the response and coupling feature of VIM of the floating platform. In most cases, the sway and surge motion amplitudes of a circular cross-section platform (CCP) are larger than those of a square cross-section platform(SCP), and the maximum amplitude is 6.1 times. The sway motion amplitudes of the two platforms are close to each other at an incidence of 45°, and when the reduced velocity exceeds 12, the sway motion amplitude of SCP even exceeds that of CCP. Under the same conditions, the response amplitude of yaw motion of SCP is much larger than that of CCP, and vortex-induced resonance is observed during the yaw motion of SCP at an incidence of 45°. The frequencies of VIM of SCP and CCP vary similarly with a reduced velocity, which can be roughly divided into three stages, but the coupling features of VIM are quite different in different stages. In the process of this experiment, a special "major frequency jump" phenomenon is observed in the yaw motion of SCP at an incidence of 45°. © 2021, Editorial Board of Journal of Ship Mechanics. All right reserved.

引用

页码：291 / 298

页数：7

共 12 条

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