Coupled Stability Analysis of Close Proximity Ship Towing

Abstract

The scope of this thesis is to study the stability of two ships in close proximity towing. Unlike previous studies in the past the lateral dynamics of both ships are included in the formulation. The equations of notion of the system consist of the sway and yaw motions of the two ships and a control law for the leading ship. An eigenvalue stability analysis of the coupled system confirms the results that are obtained through numerical simulations. It is shown that it is possible for the system to be unstable even through the classical criteria for the towing stability are satisfied. A series of parametric studies is conducted in order to analyze the sensitivity of the system for different towline lengths tension and control time constant.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2002
Accession Number
ADA401743

Entities

People

  • Mersin Gokce

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Computational Science
  • Control Systems
  • Dynamics
  • Eigenvalues
  • Engineering
  • Engineers
  • Equations
  • Equations Of Motion
  • Geometry
  • Marine Rudders
  • Mechanical Engineering
  • Naval Architecture
  • Rudders
  • Ships
  • Simulations
  • Standards
  • Systems Engineering

Readers

  • Control Systems Engineering.
  • Marine Hydrodynamics