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Article

Coupled Nonlinear Barge Motions, Part I: Deterministic Models Development, Identification and Calibration

[+] Author and Article Information
Solomon C. S. Yim, Tongchate Nakhata

Ocean Engineering Program, Oregon State University, Corvallis, OR 97331

Warren A. Bartel, Erick T. Huang

1100 23rd Avenue, Naval Facilities Engineering Service Center, Port Hueneme, CA 93043-4370

J. Offshore Mech. Arct. Eng 127(1), 1-10 (Mar 23, 2005) (10 pages) doi:10.1115/1.1854700 History: Received August 05, 2003; Revised March 23, 2004; Online March 23, 2005
Copyright © 2005 by ASME
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References

Figures

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Comparison of barge motion spectral densities between 3DOF model predictions and experimental results under random wave excitation with Hs=4.7 ft and Tp=8.2 s (case SB25). Simulated random waves are used as model input excitation.
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Comparison of 3DOF and 2DOF model predictions of time histories of roll and heave barge responses under regular wave excitation with H=6 ft and T=6 s (case SB27)
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Comparison of 3DOF and 2DOF model predictions oftime histories ofroll and heave barge response under measured random waves with Hs=4.7 ft and Tp=8.2 s (case SB25)
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Comparison of 3DOF and 2DOF model predictions of (a) roll and (b) heave spectral densities of barge responses under simulated random waves with Hs=4.7 ft and Tp=8.2 s (case SB25)
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Predicted periodic roll response amplitude as a function of regular wave period, with wave height (a) H=6 ft and (b) H=10 ft
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Predicted periodic roll response amplitude as a function of regular wave height using 3DOF and 2DOF models under fixed wave period T=6 s
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Comparison of barge motion response spectral densities between 3DOF model predictions and experimental results under random wave excitation with Hs=4.7 ft and Tp=8.2 s (case SB25). Measured waves are usedas model input excitation.
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Comparison of barge motion time histories between 3DOF model predictions and experimental results under random wave excitation with Hs=4.7 ft and Tp=8.2 s (case SB25). Measured waves are used as model input excitation (solid line=numerical results, dotted line=experimental results).
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Barge roll, heave, and sway response time histories to regular waves with H=6 ft and T=10 s (case SB30) (solid line=numerical results, dotted line=experimental results)
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Barge roll, heave, and sway response time histories to regular waves with H=7 ft and T=8 s (case SB29) (solid line=numerical results, dotted line=experimental results)
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Barge roll, heave, and sway response time histories to regular waves with H=6 ft and T=6 s (case SB27) (solid line=numerical results, dotted line=experimental results)
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Polynomial approximation of (a) roll righting moment and (b) heave restoring force as a function of roll and heave (L=120 ft,B=25 ft,D=8 ft,draft=4 ft, and KG=9.23 ft)
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Analytical surface of (a) rol righting moment and (b) heave restoring force (L=120 ft,B=25 ft,D=8 ft,draft=4 ft, and KG=9.23 ft)  
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Four main states of combined roll-heave position of barge motion
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(a) Coordinate system definition and (b) relative motion system of barge considered

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