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Title: Mooring model for barge tows in lock chamber
Authors: Stockstill, Richard L.
Keywords: Barge tows
Hawser forces
Lock chamber
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical note (Coastal and Hydraulics Engineering (U.S.)) ; IX-9.
Description: Technical note
BACKGROUND: Extensive research has been conducted in the area of modeling mooring systems in sea environments where the forcing function is in the form of periodic waves. A general summary of this is provided by the Society of Naval Architects and Marine Engineers (1983). Recently, a model of hawser forces in a lock chamber was published (Natale and Savi 2000), but this work does not provide values of system coefficients. Kalkwijk (1975) developed model equations for a mooring system within a lock chamber, but did not attempt to reproduce the flow resulting from any particular filling and emptying system, and did not address the issue of model coefficients. Information on such parameters as the hawser spring constant is available (e.g., Naval Facilities Engineering Command 1986a, 1986b), but the added mass and hydrodynamic damping coefficients have never been documented for a tow moored in a lock chamber. This study has developed a mooring system model for tows in a lock chamber (damped vibration system with nonharmonic excitation) and has implemented it in a computer code. The program reads LOCKSIM (Schohl 1999) output from a lock filling and emptying operation model and computes the resulting time-varying hawser forces.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Note

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