Numerical investigation on vortex-induced vibration response characteristics for flexible risers under sheared-oscillatory flows
Numerical investigation on vortex-induced vibration response characteristics for flexible risers under sheared-oscillatory flows
复制标题
剪切振荡流下柔性立管涡激振动响应特性数值研究
DOI：
10.1016/j.ijnaoe.2019.05.001
复制
发表时间：
2019-07
影响因子：
2.2
通讯作者：
Tang Wenyong
中科院分区：
文献类型：
--
作者：
Xue Hongxiang;Yuan Yuchao;Tang Wenyong
周期波诱导的顶端平台浪涌运动使海洋柔性隔水管遇到等效的剪切振荡流动，在这种情况下涡激振动响应将比纯剪切流动或振荡流动情况更为复杂。本文基于时域力分解模型，对剪切振荡流动下的涡激振动响应特性进行了数值研究。首先，采用的数值模型在剪切流和振荡流条件下进行了较好的室内实验验证。然后，设计并模拟了20个具有不同振荡周期和最大流速的剪切振荡流场。在长振荡周期和短振荡周期情况下，由于每一时刻的瞬时剪切流型，结构响应呈现出一些相似的特征，但由于流场变化的不同，结构响应也呈现出一些不同的模式。最后，系统地讨论了振荡周期和最大电流速度对涡激振动响应的影响及其基本机理。
Surge motion of top-end platform induced by periodic wave makes marine flexible riser encounter equivalent sheared-oscillatory flow, under which the Vortex-induced Vibration (VIV) response will be more complicated than pure sheared flow or oscillatory flow cases. Based on a time domain force-decomposition model, the VIV response characteristics under sheared-oscillatory flows are investigated numerically in this paper. Firstly, the adopted numerical model is validated well against laboratory experiments under sheared flow and oscillatory flow. Then, 20 sheared-oscillatory flow cases with different oscillation periods and top maximum current velocities are designed and simulated. Under long and short oscillation period cases, the structural response presents several similar features owing to the instantaneous sheared flow profile at each moment, but it also has some different patterns because of the differently varying flow field. Finally, the effects and essential mechanism of oscillation period and top maximum current velocity on VIV response are discussed systematically.
登录
查看更多内容
影响因子：
3.9
作者：
Jungao Wang;Shixiao Fu;R. Baarholm;Jie Wu;C. M. Larsen
通讯作者：
Jungao Wang;Shixiao Fu;R. Baarholm;Jie Wu;C. M. Larsen
DOI：
--
发表时间：
2014
期刊：
--
影响因子：
--
作者：
Haining Zheng
通讯作者：
Haining Zheng
影响因子：
3.6
作者：
M. J. Thorsen;S. Sævik;C. M. Larsen
通讯作者：
M. J. Thorsen;S. Sævik;C. M. Larsen
影响因子：
3.6
作者：
Bearman, P. W.
通讯作者：
Bearman, P. W.
影响因子：
2
作者：
GROSSMANN, A;MORLET, J
通讯作者：
MORLET, J