Transverse Vibrations of a Cylinder Very Close to a Plane Wall

[+] Author and Article Information
J. Fredso̸e, B. M. Sumer, J. Andersen, E. A. Hansen

Institute of Hydrodynamics and Hydraulic Engineering, Technical University of Denmark, Copenhagen, Denmark

J. Offshore Mech. Arct. Eng 109(1), 52-60 (Feb 01, 1987) (9 pages) doi:10.1115/1.3256990 History: Received July 22, 1984; Revised July 25, 1986; Online October 30, 2009


The paper presents a series of experiments carried out with a cylinder suspended by springs and placed very close to a plane wall. The cylinder is exposed to a steady current. The range of gap ratios between zero and one has been studied in detail. Different combinations of spring stiffness and mass of cylinder is applied in the range of reduced velocity between 2 and 10. The proximity of the wall is shown to have important influence on the behavior of the pipe. Some of these trends are explained by a mathematical model including the effect of lift force close to the wall.

Copyright © 1987 by ASME
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