Journal
JOURNAL OF FLUIDS AND STRUCTURES
Volume 22, Issue 6-7, Pages 897-903Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jfluidstructs.2006.04.014
Keywords
vortex-induced vibration; vortex shedding; multi-mode response; marine risers; finite element method; cylinder; fluid loading on risers
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One of the main problems in predicting the response of flexible structures subjected to vortex shedding is that a totally reliable model for the fluid loading does not exist. It is also very difficult to measure the distributed force exerted by the fluid along the length of a marine riser without disturbing the system in some way. The methodology described here uses experimental response data obtained in a test programme undertaken in the Delta Flume in Holland during May 2003, linked to a finite element method model (FEM) of the riser. The length-to-diameter ratio of the model used was around 470, the mass ratio (mass/displaced mass) was 3 and the Reynolds number varied between 2800 and 28 000. By using the response data as the input to the numerical model, the instantaneous distributed in-line and transverse forces acting on a flexible cylinder can be studied. (c) 2006 Elsevier Ltd. All rights reserved.
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