Validation of Container Ship Squat Modeling Using Full-Scale Trials at the Port of Fremantle
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 144, Issue 1
Abstract
In this paper, selected results are presented from a set of recent full-scale trials measuring the dynamic sinkage, trim, and heel of 16 container ship transits entering and leaving the Port of Fremantle, Western Australia. Measurements were made using high-accuracy Global Navigation Satellite System (GNSS) receivers and a fixed reference station. The measured dynamic sinkage, trim, and heel of three example container ship transits are discussed in detail. Maximum dynamic sinkage and dynamic draught, as well as elevations of the ship’s keel relative to chart datum, are calculated. A theoretical method using slender-body shallow-water theory is applied to calculate sinkage and trim for the transits. It is shown that the theory is able to predict ship squat (steady sinkage and trim) with reasonable accuracy for container ships at full scale in open dredged channels. In future work, the measured ship motions, along with full measured wave time series data, will be used for validating wave-induced motion software.
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Acknowledgments
The authors wish to thank all of the marine pilots and staff at Fremantle Ports for their assistance, support, and enthusiasm in conducting the trials. The authors would also like to acknowledge the following organizations for their contributions to this research: Seamax Shipping, Tokei Kaiun, and CMA CGM, who provided access to and hull information for the Seamax Stamford, Mol Paramount, and CMA CGM Wagner, respectively; Flanders Hydraulics Research and Ghent University, who provided hull data for FHR Ship D; and OMC International, who provided surveyed depth data for the channels. The contribution of an Australian Government Research Training Program Scholarship in supporting this research is acknowledged by the authors.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 144 • Issue 1 • January 2018
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Feb 24, 2017
Accepted: Jul 18, 2017
Published online: Oct 25, 2017
Published in print: Jan 1, 2018
Discussion open until: Mar 25, 2018
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