Dynamic Response of a Cantilever Pile to Vortex Shedding in Regular Waves

[+] Author and Article Information
M. F. Zedan, J. Y. Yeung

Brown & Root, Inc., Houston, Tex. 77001

H. J. Salane

Civil Engineering Department, University of Missouri-Columbia, Columbia, Mo. 65211

F. J. Fischer

Shell Development Co., Houston, Tex. 77001

J. Energy Resour. Technol 103(1), 32-40 (Mar 01, 1981) (9 pages) doi:10.1115/1.3230812 History: Received December 01, 1980; Online October 22, 2009


This paper summarizes an experimental investigation of cantilever pile dynamics in response to wave excitation under vortex-shedding “lock-in” conditions. The study was carried out in regular waves for two conditions of wave length in relation to water depth. Pile response was measured in terms of top accelerations and bottom strains in both the in-line and transverse directions. Vortex-shedding lock-in is shown to produce substantial dynamic amplification of deflection not only in the transverse direction, but also in the in-line direction. Results indicate that the Morison equation is inadequate to describe the in-line force under vortex-shedding lock-in.

Copyright © 1981 by ASME
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