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RESEARCH PAPERS: Offshore Mechanics

Vortex-Induced Vibrations due to Steady and Wave-Induced Currents of a Flexible Cylinder Near a Plane Boundary

[+] Author and Article Information
D. T. Tsahalis

Shell Development Company, Houston, Tex. 77001

J. Offshore Mech. Arct. Eng 109(2), 112-118 (May 01, 1987) (7 pages) doi:10.1115/1.3256998 History: Received April 12, 1984; Revised May 01, 1986; Online October 30, 2009

Abstract

Model tests were performed in a wave tank to determine the effect of combined steady and wave-induced currents and/or proximity of a plane boundary (seabottom) on the vortex-induced vibrations of a flexible pipe. The first mode response of the pipe in both the transverse and in-line directions was measured using a biaxial accelerometer positioned inside the pipe at the midpoint of its span. Results are presented for a wide range of steady flow velocities with superimposed wave-induced flow corresponding to Keulegan–Carpenter numbers of 0, 5, 10, 15, 20, 25 and 30 and pipe-to-wall gaps of 1, 2, 4, 6 and ∞ (isolated pipe) pipe diameters.

Copyright © 1987 by ASME
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