Experimental Assessment of Hydrodynamic Coefficients for a Heave Plate Executing Pitch Oscillations
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 148, Issue 1
Abstract
A submerged oscillating heave plate is utilized as a mechanism in some marine structures for vibration reduction. Quantifying the hydrodynamic properties in axial (heave) oscillations has been extensively archived in published research. However, the rotational hydrodynamic properties of an isolated plate under forced oscillation have not been investigated, which may be of relevance when such structures undergo roll or pitch oscillations. This paper reports on an experimental study that aims to find the trends of the rotational hydrodynamic coefficients versus vibration amplitude for an isolated disk. Furthermore, formulae for nondimensional rotational coefficients based on empirical fits to experimental data will help to generalize these coefficients to full scale. The experimental tests were conducted in two sets. In the first set, disks of different sizes were excited in rotation around their central axis, whereas in the second set the disks were oscillated at a distance from the rotational axis. Generally and in accordance with results for heave oscillations, the results of the hydrodynamic coefficients show an increasing linear trend versus vibration amplitude.
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Data Availability Statement
Damage data that support the findings of this study may be available from the corresponding author upon reasonable request.
Acknowledgments
The authors appreciate the support of Crosby Hall in the Mechanical Engineering department at the University of Maine and its Manager, Stephen Abbadessa. The authors also express their gratitude to Mr. Jeffrey Pass and Michael Choiniere, for their assistance in a technical part of this research. This research was conducted with partial support provided by the Ministry of Science, Research, and Technology of Iran.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 148 • Issue 1 • January 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Dec 28, 2020
Accepted: Aug 13, 2021
Published online: Sep 24, 2021
Published in print: Jan 1, 2022
Discussion open until: Feb 24, 2022
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