文献类型： 会议论文

第一作者： Guo-qiang Tang

作者： Guo-qiang Tang ¹ ; Lin Lu ² ; Bin Teng ¹ ; Han-il Park ³ ; Ji-ning Song ¹ ; Jian-qiao Zhang ⁴ ;

作者机构： 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, P.R.China

2.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, P.R.China Center for Deepwater Engineering, Dalian University of Technology, Dalian, P.R.China

3.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, P.R.China Department of Ocean Engineering, Korea Maritime University, Youngdogu, Korea

4.Fishery Engineering Research Institute of Chinese Academy of Fishery Sciences, Beijing, P.R.China

关键词： vortex-induced vibration;in-line dynamic response;long flexible risers;laboratory tests;fatigue life

会议名称： ISOPE Pacific/Asia offshore mechanics symposium

主办单位：

页码： 332-338

摘要： This work presents the experimental results focused on the dynamic characteristics of in-line response of a long flexible riser. The riser model is 28.04 m in length and 0.016 m in diameter, giving an aspect ratio (length to diameter) of around 1750. The mass ratio (structural mass over displaced fluid mass per unit) of the riser model approximates 1.0. By means of towing the riser model in a wave basin, the uniform current was generated. The time series of strains of the riser model under various current speeds (ranging from 0.15 m/s to 0.60 m/s) were monitored using the Fiber Bragg Grating (FBG) sensors. The mode decomposition method was employed to analyze the measured strain signals. The dominant frequency, displacement traces, standard deviation of displacements and fatigue life associated with the in-line vibration were obtained. The experimental results indicted that the higher order response mode from the in-line vibration together with the large deflection may reduce the fatigue life of risers as severely as that from the cross-flow vibration, which should be paid much more attentions to the practical engineering applications.

分类号： P75