Non-Linear Rolling of Ships in Large Sea Waves

Abstract

The United States Navy has taken a new interest in tumblehome hulls. While the stealth characteristics of these hull forms make them attractive to the Navy, their sea keeping characteristics have proven to be problematic. Normal approximations of sea keeping characteristics using linear differential equations with constant coefficients predict a very stable platform, while observations in model tests show a ship that is prone to extreme roll transients. This thesis examines a simple method of producing a non-linear simulation of roll motion using a tumblehome hull provided by the Office of Naval Research. This research demonstrates the significant difference that a variable restoring coefficient introduces into a hull's seakeeping characteristics.

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Document Details

Document Type
Technical Report
Publication Date
May 11, 2007
Accession Number
ADA493896

Entities

People

  • Scott M. Vanden Berg

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Birds
  • Boundary Value Problems
  • Computer Programming
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Differential Equations
  • Engineering
  • Engineers
  • Equations
  • Equations Of Motion
  • Hulls (Marine)
  • Marine Engineering
  • Mechanical Engineering
  • Naval Architecture
  • Spreadsheet Software
  • Three Dimensional

Readers

  • Control Systems Engineering.
  • Naval Architecture and Marine Engineering.
  • Systems Analysis and Design