Untitled - Teknik Kelautan / ITB

Recent Development of The Empirical Basis for Prediction of
Vortex Induced Vibrations
Carl M. Larsen 1 , Elizabeth Passano 2 , Halvor Lie 2
1 CeSOS, Dep. Of Marine Technology, NTNU, Trondheim, Norway
2 MARINTEK, Trondheim, Norway
Email: carl.m.larsen@ntnu.no
Abstract. This paper describes the research activity related to VIV that has taken
place at NTNU and MARINTEK in Trondheim during the last years. The overall
aim of the work has been increased understanding of the VIV phenomena and to
improve the empirical basis for prediction of VIV. The work has included
experiments with flexible beams in sheared and uniform flow and forced motions of
short, rigid cylinders. Key results in terms of hydrodynamic coefficients and analysis
procedures have been implemented in the computer program VIVANA, which has
resulted in new analysis options and improved hydrodynamic coefficients. Some
examples of results are presented, but the main focus of the paper is to give an
overview of the work and point out how the new results can be used in order to
improve VIV analyses. Finally some ideas for further work and improvements of
empirical methods for prediction of VIV are presented.
Keywords:Marine technology; Risers; Pipelines; Vortex induced vibrations;
Analysis; Experiments; Empirical models
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