On the force distribution along the axis of a flexible circular cylinder undergoing multi-mode vortex-induced vibrations

Huera Huarte, F.J., Bearman, P.W. and Chaplin, J.R. (2005) On the force distribution along the axis of a flexible circular cylinder undergoing multi-mode vortex-induced vibrations. Proceedings of the 4th Conference on bluff body wakes and vortex-induced vibrations, Santorini, Greece. 21 - 24 Jun 2005.

Record type: Conference or Workshop Item (Paper)

Abstract

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.

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