Multi-frequency cable vibration experiments

Author(s)
Wiggins, Andrew (Andrew Dale)
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Massachusetts Institute of Technology. Dept. of Ocean Engineering.
Advisor
Michael S. Triantafyllou.
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Abstract
A series of Multi-Frequency cable vibration experiments at Reynolds number 7600 were carried out at the MIT Tow Tank using the Virtual Cable Towing Apparatus (VCTA). Motions observed in a Direct Numerical Simulation of a flexible cylinder in a shear current were imposed on the VCTA and force measurements taken. Results showed a good agreement between the RMS lift coefficients of experiment and simulation. Complex Demodulation Analysis revealed significant lift force phase modulations. This analysis also showed that to a large extent the 3-dimensional behavior of the DNS was captured by the 2-d experiment in regions of low inflow, and to a lesser extent in regions of high inflow. Applications of results to future vortex induced vibration force models are discussed.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2005.
 
Includes bibliographical references (p. 99-101).
 
Date issued
2005
URI
http://hdl.handle.net/1721.1/33586
Department
Massachusetts Institute of Technology. Dept. of Ocean Engineering.
Publisher
Massachusetts Institute of Technology
Keywords
Ocean Engineering.
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