Simulation of Hydrodynamic Forces and Motions for a Freely Maneuvering Ship in a Seaway

Abstract

ShipMo3D is DRDC Atlantic's object-oriented library for modelling ship motions in waves. Previous ShipMo3D development considered ships travelling with nominally steady speed and heading. This report describes the extension of the ShipMo3D library to model motions of freely maneuvering ships. New ShipMo3D force components arise from hull maneuvering, resistance, propulsion, and rudder-propeller interaction. Comparisons of turning circle predictions with full-scale trials data for the tanker Esso Osaka give encouraging results. Comparisons of predictions with motions of a steered warship model in waves give very good results. Excellent agreement between predictions for a freely maneuvering ship and for a ship with nominally steady speed and heading indicates that the extension of ShipMo3D to freely maneuvering ships has been correctly implemented. It is recommended that future work further investigate prediction of hull maneuvering forces.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2005
Accession Number
ADA463097

Entities

People

  • Kevin Mctaggart

Organizations

  • Defence Research and Development Canada

Tags

DTIC Thesaurus Topics

  • Agreements
  • Angular Motion
  • Bilge Keels
  • Center Of Gravity
  • Classification
  • Computational Fluid Dynamics
  • Control Systems
  • Coordinate Systems
  • Cross Flow
  • Equations
  • Equations Of Motion
  • Fluid Dynamics
  • Propellers
  • Resonant Frequency
  • Seakeeping
  • Security
  • Ship Motion

Readers

  • Marine Hydrodynamics
  • Naval Architecture and Marine Engineering.
  • Software Engineering.