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Citation:
　Xiaochao Li,Yongxue Wang,Guoyu Wang,et al.Mode Transitions in Vortex-induced Vibrations of a Flexible Pipe near Plane Boundary[J].Journal of Marine Science and Application,2013,(3):334-343.[doi:10.1007/s11804-013-1198-6]
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Mode Transitions in Vortex-induced Vibrations of a Flexible Pipe near Plane Boundary

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Title:
Mode Transitions in Vortex-induced Vibrations of a Flexible Pipe near Plane Boundary
Author(s):
Xiaochao Li;  Yongxue Wang;  Guoyu Wang;  Meirong Jiang and Ying Sun
Affilations:
Author(s):
Xiaochao Li;  Yongxue Wang;  Guoyu Wang;  Meirong Jiang and Ying Sun
1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410004, China 2. Hu’nan Province Key Laboratory of Water, Sediment Sciences & Flood Hazard Prevention, Changsha University of Science & Technology, Changsha 410004, China 3. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Keywords:
submarine pipeline span;  flexible pipe;  vortex-induced vibrations;  mode transition
分类号:
-
DOI:
10.1007/s11804-013-1198-6
Abstract:
A pipe model with a mass ratio (mass/displaced mass) of 4.30 was tested to investigate the vortex-induced vibrations of submarine pipeline spans near the seabed. The pipe model was designed as a bending stiffness-dominated beam. The gap ratios (gap to diameter ratio) at the pipe ends were 4.0, 6.0, and 8.0. The flow velocity was systematically varied in the 0–16.71 nondimensional velocity range based on the first natural frequency. The mode transition between the first and the second mode as the flow velocity increases was investigated. At various transition flow velocities, the research indicates that the peak frequencies with respect to displacement are not identical along the pipe, nor the frequencies associated with the peak of the amplitude spectra for the first four modes as well. The mode transition is associated with a continuous change in the amplitude, but there’s a jump in frequency, and a gradual process along the pipe length.

References:

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Memo

Memo:
Supported by the National Natural Science Foundation of China (No. 41176072), the Scientific Research Fund of Hunan Provincial Education Department (No. 12C0030), the Program for Hu’nan Province Key Laboratory of Water, Sediment Sciences and Flood Hazard Prevention (No. 2012SS07), and the National Natural Science Foundation for Youth of China (No. 51109018)
Last Update: 2013-08-27