ExxonMobil Upstream Research Company developed an advanced model test method to determine reliable damping values for predicting low frequency motions of an FLNG barge and an LNG carrier. Since viscous damping forces are a very small portion of the total force on the model, how to separate the viscous forces from the total forces is the key technical challenge. To better isolate viscous damping forces, an inertial compensation system consisting of springs was employed in the test. The spring stiffness was designed such that the restoring force cancelled the large inertial loads at the oscillation frequency. Furthermore, double-body models were built and were deeply submerged to minimize surface wave damping. With such an experimental setup, the total force measured was mainly the viscous damping force. Viscous damping was derived from the measured force and motion time histories.
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ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
June 6–11, 2010
Shanghai, China
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4909-5
PROCEEDINGS PAPER
An Advanced Test Method to Determine Viscous Damping of Floating Structures
Z. J. Huang,
Z. J. Huang
ExxonMobil Upstream Research Company, Houston, TX
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B. J. O’Donnell,
B. J. O’Donnell
ExxonMobil Upstream Research Company, Houston, TX
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T. W. Yung,
T. W. Yung
ExxonMobil Upstream Research Company, Houston, TX
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S. T. Slocum
S. T. Slocum
ExxonMobil Upstrean Research Company, Houston, TX
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Z. J. Huang
ExxonMobil Upstream Research Company, Houston, TX
B. J. O’Donnell
ExxonMobil Upstream Research Company, Houston, TX
T. W. Yung
ExxonMobil Upstream Research Company, Houston, TX
S. T. Slocum
ExxonMobil Upstrean Research Company, Houston, TX
Paper No:
OMAE2010-21156, pp. 665-672; 8 pages
Published Online:
December 22, 2010
Citation
Huang, ZJ, O’Donnell, BJ, Yung, TW, & Slocum, ST. "An Advanced Test Method to Determine Viscous Damping of Floating Structures." Proceedings of the ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 1. Shanghai, China. June 6–11, 2010. pp. 665-672. ASME. https://doi.org/10.1115/OMAE2010-21156
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