Dynamic responses and flow-induced vibration mechanism of three tandem circular cylinders in planar shear flow

doi:10.1016/j.oceaneng.2020.107022

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Dynamic responses and flow-induced vibration mechanism of three tandem circular cylinders in planar shear flow
	Tu, Jiahuang 2,3; Tan, Xiaoling 2; Deng, Xuhui 2,3; Han, Zhaolong 4; Zhang, Min 5; Li, Zhanjie 1; Xu, Jixiang 6; Zhang, Ping 2
刊名	Ocean Engineering
	2020-03-01
卷号	199
关键词	Drops Dynamic response Finite element method Fluid structure interaction Navier Stokes equations Reynolds number Shear flow Vibration analysis Vortex flow Wakes Characteristic based splits Downstream cylinders Flow charac-teristics Flow induced vibrations Frequency characteristic Motion trajectories Resonance phenomena Vibration amplitude
ISSN号	00298018
DOI	10.1016/j.oceaneng.2020.107022
英文摘要	Numerical study is conducted on flow-induced vibrations (FIVs) of three circular cylinders arranged in tandem with spacing ratio L/D = 5.5 in planar shear flow. The cylinders are free to vibration in both in-line and transverse directions. A four-step semi-implicit Characteristic-based split (4-SICBS) finite element method is adopted to solve the governing Navier-Stokes equations. The mass ratio of each cylinder is set as mr = 2.0, and the structural damping ratio as zero to maximize the flow-induced responses of the cylinders. The effects of three main parameters, such as the Reynolds number (Re = 80, 120, 160), the shear ratio (k = 0.0, 0.05, 0.1), and the reduced velocity (Ur = 3–21), are considered. The changes of vibration amplitudes, frequency characteristics, motion trajectories and flow characteristics are analyzed. The results show that, the dynamic responses of the upstream cylinder are similar to those of an isolated cylinder. The Re, k and Ur play a more important role in the FIVs of the midstream and downstream cylinders. As Re ≤ 120, the dynamic responses of the cylinders change slightly with the increasing of Re, while they present a dramatic increase because of the unstable flow characteristic at Re = 160. Additionally, with the increasing of Re, the vibration response mechanism of the cylinders in the in-line direction will change from resonance phenomenon into the vortex interference. For the motion orbits of the circular cylinders, in additional to the eight-figure, raindrop, oval and irregular shape, the dual-raindrop, dual-eight and dual-oval sharp are observed. Finally, regarding the flow field, it is found that the interference of the wake vortex is highly affected by the shear ratio of the incoming flow, resulting in great changes on the wake pattern and dynamic responses. Especially, the "2T"wake pattern is observed. © 2020 Elsevier Ltd
WOS研究方向	Engineering ; Oceanography
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000518873800008
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115785]
专题	土木工程学院
作者单位	1.Department of Engineering, SUNY Polytechnic Institute, Utica; NY; 13502, United States; 2.College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan; Hunan Province; 411105, China; 3.Hunan Key Laboratory of Geomechanics and Engineering Safety, Xiangtan; Hunan Province; 411105, China; 4.School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; 5.College of Civil Engineering and Architecture, Guilin University of Technology, Guilin; 541004, China; 6.Department of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Tu, Jiahuang,Tan, Xiaoling,Deng, Xuhui,et al. Dynamic responses and flow-induced vibration mechanism of three tandem circular cylinders in planar shear flow[J]. Ocean Engineering,2020,199.
APA	Tu, Jiahuang.,Tan, Xiaoling.,Deng, Xuhui.,Han, Zhaolong.,Zhang, Min.,...&Zhang, Ping.(2020).Dynamic responses and flow-induced vibration mechanism of three tandem circular cylinders in planar shear flow.Ocean Engineering,199.
MLA	Tu, Jiahuang,et al."Dynamic responses and flow-induced vibration mechanism of three tandem circular cylinders in planar shear flow".Ocean Engineering 199(2020).