Investigation of a new vortex-induced vibration suppression device in laboratory experiments

被引：5
|
作者：
Zhang Yongbo [1 ,2 ]
Guo Haiyan [1 ]
Liu Xiaochun [1 ]
Li Xiaomin [1 ]
机构：
[1] Ocean Univ China, Coll Engn, Qingdao 266100, Peoples R China
[2] Natl Oceanog Ctr, Qingdao 266071, Peoples R China
来源：
JOURNAL OF OCEAN UNIVERSITY OF CHINA | 2012年 / 11卷 / 02期
关键词：
vortex-induced vibration (VIV); suppression vibration; wavelet transform; fatigue life; PASSIVE CONTROL;
D O I：
10.1007/s11802-012-1805-1
中图分类号：
P7 [海洋学];
学科分类号：
0707 ;
摘要：
In order to mitigate vortex-induced vibration (VIV) of marine risers, especially to eliminate the phenomenon of frequency slock-in', a new suppression device of crescent-shaped flow spoiler was designed with seven different layout schemes. VIV model tests with six flow levels were conducted in a large wind-wave-current flume. In all cases, vibration responses in both in-line and cross-flow cases were measured. With the installation of suppression devices vibration frequency evolution of a riser was analyzed by Morlet wavelet transform. The principle of VIV suppression was interpreted through vibration characteristics. Fatigue life of the riser was calculated by the Palmgren-Miner rule. Compared with a bare riser, vibration of an outfitted riser with suppression devices disturbed the steady flow, the vibration amplitudes in the two flow directions were reduced, and the riser fatigue life was improved.
引用
收藏
页码：129 / 136
页数：8
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