VORTEX INDUCED VIBRATION AND STRUCTURAL INTEGRITY OF DEEP WATER FLEXIBLE RISERS

Lead Research Organisation: University of Southampton
Department Name: Faculty of Engineering & the Environment

Abstract

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Publications

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Chaplin J (2018) Laboratory measurements of the vortex-induced vibrations of an untensioned catenary riser with high curvature in Journal of Fluids and Structures

 
Description Following completion of laboratory tests we have analysed the measurements in depth. The problem we were dealing with concerned the vortex-induced vibrations of highly flexible offshore risers, pipes that go down from the surface to the sea bed and convey hydrocarbons and other fluids. Our main finding is that the dominant frequency of oscillation of a riser in a current may be about one-half of that predicted by standard approaches that are based on current levels of understanding. This is a surprising result that is compatible with just one earlier observation, but could have significant consequences for the prediction of fatigue lives of operational risers.

We have produced high quality data on a problem of interest in the offshore oil and gas industry that will provide a sound basis for the validation of numerical prediction tools.
Exploitation Route Several groups of researchers are developing software for predicting fatigue lives of offshore risers. Our measurements will provide them with very useful data for checking purposes. No other comparable results are openly available. A first paper has been submitted for journal publication.
Sectors Aerospace, Defence and Marine,Energy
 
Description Please see the impact description provided for EP/K034243/1
First Year Of Impact 2016
Sector Aerospace, Defence and Marine,Energy
Impact Types Economic