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BOLLARD PULL OF BARGE WITH CARGO

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bollard-pull-for-barge-plus-cargo.pdf
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TOWING RESISTANCE FORCE CALCULATION

The aim of this calculation is to perform the analysis of  the barge total resistance force during the cargo transportation.
The global system (barge & jacket & ballast) is considered with different towing speeds, and the total resistant force is evaluated. The total tow resistance is the sum of the following contributions:
​
  • Added resistance in wave due to wave drift,
  • Calm water resistance (drag + wave making),
  • Resistance due to wind and current,
  • Additional wind and current effect (fwd speed).

WAVE DRIFT FORCE

The calculation of the wave drift force is based on DNV guidelines for marine transportation

RESISTANCE DUE TO TOWING IN CALM WATER

The resistance due to drag friction fluid velocity is evaluated based on the following “Morison”formula:

ADDITIONAL RESISTANCE DUE TO WIND AND CURRENT

The drag resistance is computed according to the following formula: F drag = ½ * ρ * C * S * (V ²TOT - V ² FS), with VTOT the total speed, including the induced speed due to towing velocity (VFS),and the additional speed.

TOTAL TOW FORCE

Additional wind for transit and extreme conditions is considered facing the convoy. Total resistance can be calculated as

​Ftot = Fdrag + Fdrift + F calm water
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  • Ship Design
    • Tug Designs
    • Boat Design
    • Ship Design Process >
      • Barge Design
      • Modular Spud Barge Design
    • Tanker Design
    • FPSO Engineering
    • Jetty Design
    • Offshore Support Vessel design
    • LNG Vessel Design
  • Consultancy
    • Naval Architecture
    • Structure FEM Analysis
    • Hydrodynamics
    • Stability Analysis
    • Production Design
    • Ship Manuals
    • Machinery & Piping
  • Offshore Engineering
    • Mooring Analysis
    • Transportation/Installation
    • Offshore Heavy Lifting
    • Offshore Pipeline Engineering
  • ONLINE RESOURCE
  • CONTACT