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Aug 19, 2013
Computer Simulation of Moored Ship Motion Considering Harbor Resonance in Pohang New Harbor
Authors: Moonsu Kwak, Ph.D. [email protected], and Chongkun Pyun, Ph.D. [email protected]Author Affiliations
Publication: Ports 2013: Success through Diversification
Abstract
This paper proposes a computational method for estimating the effect that harbor resonance has on moored ship motion. The computation of harbor resonance used the CGWAVE model, and the computation of moored ship motion used the three-dimensional Green's function method. This method was verified with field motion measurement data from actual moored ships and wave field data and down time record data from Pohang New Harbor. The resonance periods obtained from wave field data in Pohang New Harbor were 80, 33, 23, and 8 min, which were the long waves, and 42, 54, and 60 s, which were the infra-gravity waves inside the harbor slip. The simulation results for harbor resonance were compared to the actual wave field data. This study investigated whether harbor resonance has an effect on moored ship motion using simulated results of ship motion both with and without harbor resonance. In the case of harbor resonance included, moored ship motion increased by 12-400% when compared with the results without harbor resonance included. We found that harbor resonance has a greater effect on the surge and heave motion of a large-sized ship and on the roll and the yaw motion of a small-sized ship.
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© 2013 American Society of Civil Engineers.
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Published online: Aug 19, 2013
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Professor of Civil Engineering, Myongji College, Seoul 120-776, Korea. E-mail: [email protected]
Professor of Civil and Environmental Engineering, Myongji University, Yongin 449-728, Korea. E-mail: [email protected]
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