Flow-induced vibration (FIV) suppression of two tandem long flexible cylinders attached with helical strakes
Flow-induced vibration (FIV) suppression of two tandem long flexible cylinders attached with helical strakes
复制标题
两个串联的带螺旋板的长柔性圆柱体的流致振动 (FIV) 抑制
DOI：
10.1016/j.oceaneng.2018.09.019
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发表时间：
2018-12
影响因子：
5
通讯作者：
Lidan Zhou
中科院分区：
文献类型：
--
作者：
Wanhai Xu;Yang Yu;Enhao Wang;Lidan Zhou
在拖曳水池中对带或不带螺旋列板的两个串联柔性圆柱体的流激振动（FIV）特性进行了实验研究。中心距为 8.0D（其中 D 为光滑圆柱直径）的两个圆柱模型允许在横流（CF）和顺流（IL）方向上振荡。通过沿着水箱拖曳圆柱体模型来模拟均匀流动。由拖车速度和光滑圆柱体直径定义的相应雷诺数范围约为800至16000。实验中采用节距为17.5D、高度为0.25D的列板，这通常被认为是减少水中隔离柔性圆柱体涡激振动（VIV）的最有效配置。通过与孤立光滑圆柱和镶条圆柱的实验结果进行比较，对实验结果进行了分析，包括位移响应、频率响应和平均阻力系数。带螺旋板条的上游筒体的FIV与孤立带板条筒体的FIV较为吻合，这意味着在实验中选定的间距T=8.0D时，螺旋板条对上游筒体FIV的抑制性能几乎与下游筒体无关。由于上游圆柱体的不稳定尾流，下游圆柱体螺旋列板的 FIV 抑制效率在 CF 和 IL 方向上均有所下降。在某些条件下，下游筒体的位移幅度甚至可以通过螺旋列板来增强。此外，还研究了放置在平列式气缸上游或下游的光滑气缸的动态响应，以加深对两串联气缸系统的 FIV 行为的理解。
The characteristics of the flow-induced vibration (FIV) of two tandem flexible cylinders with or without helical strakes were experimentally investigated in a towing tank. The two cylinder models with a center-to-center spacing of 8.0D(whereDis the smooth cylinder diameter) were allowed to oscillate in both the cross-flow (CF) and in-line (IL) directions. The uniform flow was simulated by towing the cylinder models along the tank. The corresponding Reynolds numbers, defined by the towing carriage velocity and the smooth cylinder diameter, ranged approximately from 800 to 16000. The strake with a pitch of 17.5Dand a height of 0.25D, which is generally believed to be the most effective configuration for reducing vortex-induced vibration (VIV) of an isolated flexible cylinder in water, was adopted in the experiment. The experimental results, including the displacement responses, frequency responses and mean drag force coefficients, were analyzed by comparing with those of the isolated smooth and straked cylinders. The FIV of the upstream cylinder with helical strakes is in reasonable agreement with that of the isolated straked cylinder, which means that the performance of the helical strakes for suppressing the FIV of the upstream cylinder is almost independent of the downstream cylinder at the selected spacingT= 8.0Din the experiment. The FIV suppression efficiency of the helical strakes of the downstream cylinder was observed to decrease in both the CF and IL directions due to the unsteady wake from the upstream cylinder. Under certain conditions, the displacement amplitude of the downstream cylinder can even be enhanced by the helical strakes. Moreover, the dynamic responses of a smooth cylinder placed upstream or downstream of a straked cylinder were also investigated for improving the understanding of the FIV behaviors of a two-tandem-cylinder system.
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影响因子：
4.3
作者：
L. K. Quen;A. Abu;N. Kato;P. Muhamad;Asnizah Sahekhaini;Hanida Abdullah
通讯作者：
L. K. Quen;A. Abu;N. Kato;P. Muhamad;Asnizah Sahekhaini;Hanida Abdullah
影响因子：
3.9
作者：
S. Fang;J. Niedzwecki;Shixiao Fu;Run-pei Li;Jianmin Yang
通讯作者：
S. Fang;J. Niedzwecki;Shixiao Fu;Run-pei Li;Jianmin Yang
影响因子：
3.6
作者：
F. Huera-Huarte;Z. Bangash;L. González
通讯作者：
F. Huera-Huarte;Z. Bangash;L. González
DOI：
10.1002/9783527651894.ch10
发表时间：
2012-12
期刊：
--
影响因子：
--
作者：
Y. Ishida;Toshio Yamamoto
通讯作者：
Y. Ishida;Toshio Yamamoto
影响因子：
4.7
作者：
X. Q. Wang;R. So;K. Chan
通讯作者：
X. Q. Wang;R. So;K. Chan