Forces and Moments on Ships to be Moored at Diego Garcia.

Abstract

The technique used to calculate wind forces and moments on a given ship is delineated in Chapter XII, Section 1 of the forthcoming book Ship Design and Construction . The pertinent material is reproduced in Appendix A of this report. Basically the abovewater area is divided into layers of equivalent area. A wind velocity profile is assumed wherein the velocity varies as the one-fifth power of the height above the surface of the water and the drag forces for a bow-on and for a beam-on wind are calculated. Multipliers, derived from past experience and model tests, are applied to these forces to derive the resultant forces and moments for winds acting at various angles from bow-on to stern-on. Current forces are also derived. The ships on which these calculations were made are the Maine Class Ro/Ro merchant ships (MarAd Designation C7-S-95a) and the Challenger II Class General Cargo Ships (MarAd Designation C4-S-64a).

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1980
Accession Number
ADA167744

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Availability
  • Bulk Cargo
  • Buoys
  • Cargo Ships
  • Classification
  • Construction
  • Diego Garcia
  • Engineering
  • Model Tests
  • Mooring Buoys
  • Security
  • Ship Design
  • Ship Motion
  • Ships
  • Wind
  • Wind Velocity

Readers

  • Aerodynamics/Aeronautics.
  • Calculus or Mathematical Analysis
  • Naval Architecture and Marine Engineering.