The method of matched eigenfunction expansions is applied in this paper to obtain the hydrodynamic coefficients of a pair of coaxial cylinders, each of which can have independent movement. The geometry idealizes a device for extracting ocean wave energy in the heave mode. The effects of geometric variations and the interaction between cylinders on the hydrodynamic properties are discussed. Analytical expressions for the low-frequency behavior of the hydrodynamic coefficients are also derived. The wave-exciting force on the bottom surface of either one of the cylinders is derived using the radiation solutions, with a generalized form of the Haskind relation developed for this geometry. The presented results are immediately applicable to examine free motion of coaxial cylinders in a wave field.
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ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4491-5
PROCEEDINGS PAPER
Inertia, Damping, and Wave Excitation of Heaving Coaxial Cylinders
Fun Pang Chau,
Fun Pang Chau
Applied Weather Technology, Sunnyvale, CA
University of California at Berkeley, Berkeley, CA
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Ronald W. Yeung
Ronald W. Yeung
University of California at Berkeley, Berkeley, CA
Search for other works by this author on:
Fun Pang Chau
Applied Weather Technology, Sunnyvale, CA
University of California at Berkeley, Berkeley, CA
Ronald W. Yeung
University of California at Berkeley, Berkeley, CA
Paper No:
OMAE2012-83987, pp. 803-813; 11 pages
Published Online:
August 23, 2013
Citation
Chau, FP, & Yeung, RW. "Inertia, Damping, and Wave Excitation of Heaving Coaxial Cylinders." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 4: Offshore Geotechnics; Ronald W. Yeung Honoring Symposium on Offshore and Ship Hydrodynamics. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 803-813. ASME. https://doi.org/10.1115/OMAE2012-83987
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