Vortex-Induced Response of a Flexible Cylinder in a Sheared Current

[+] Author and Article Information
N. M. Patrikalakis, C. Chryssostomidis

Department of Ocean Engineering, Massachusetts Institute of Technology, Cambridge, Mass. 02139

J. Energy Resour. Technol 108(1), 59-64 (Mar 01, 1986) (6 pages) doi:10.1115/1.3231242 History: Received October 01, 1984; Revised April 23, 1985; Online October 22, 2009


In this paper we outline a method for the approximate prediction of the static and lift responses of a flexible cylinder in a unidirectional variable stream. Our prediction is based on information derived from experimental results involving rigid cylinders forced to oscillate sinusoidally orthogonally to a uniform stream. Our approach represents the multifrequency lift response of a flexible cylinder in a sheared current by predicting a number of independently determined, monochromatic, multimode dynamic solutions. For each such multimode solution, our procedure allows the simultaneous evaluation of lift response frequency, amplitude, and phase between modes. A numerical example assuming bimodal solutions is included to illustrate our method for the geometry of a single-tube marine riser.

Copyright © 1986 by ASME
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