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Indexed by:会议论文

Date of Publication:2010-06-20

Included Journals:EI、Scopus

Volume:3

Page Number:1115-1120

Abstract:This paper reports experimental tests on vortex-induced vibration (VIV) of a long flexible riser towed horizontally in a wave basin. The riser model has an external diameter of 16 mm and a total length of 28.04 m, giving an aspect ratio of about 1750. Reynolds numbers are within the range from 103 to 104. The mass ratio of the riser model is 1.0 Fiber optic grating strain gauges are used to measure the dynamic response of the model. The VIV response strain, vibration frequency and amplitude, displacement, and displacement standard deviation of the flexible riser model were examined in both cross-flow and in-line directions. The experimental results showed that the cross-flow dominant mode may reach up to 6 and the in-line dominant mode over 12 with dominant frequencies given by a Strouhal number of about 0.18. Higher harmonics such as the third, fourth and fifth vibration components were also observed. ? 2010 by The International Society of Offshore and Polar Engineers (ISOPE).