ON THE FORCES AND HINGE MOMENT OF A STRUT -WING-POD HYDROFOIL ASSEMBLY UNDERGOING RETRACTION IN A BEAM SEA,

Abstract

To examine the structural adequacy and retraction capability of a hydrofoil assembly designed for inboard rotation, it is necessary to determine the external loading first. A simplified theory based on linearized rigid-body dynamics was developed to estimate the forces and hinge moment on a single (port or starboard) strut-foil-pod configuration undergoing retraction while the hull-borne boat is rolling in a beam sea. Utilizing available free -oscillation model test data of a representative hydrofoil craft, engineering 'upper bound' estimates are carried out to demonstrate the theory for the extreme 'foils up' and 'foils down' conditions. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1965
Accession Number
AD0630818

Entities

People

  • Samuel M. Y. Lum

Tags

DTIC Thesaurus Topics

  • Assembly
  • Boats
  • Dynamics
  • Engineering
  • Engineers
  • Hydrofoil Craft
  • Hydrofoils
  • Model Tests
  • Motion
  • Oscillation
  • Planform
  • Rotation
  • Shape

Fields of Study

  • Physics

Readers

  • Marine Hydrodynamics
  • Marine Propulsion Engineering and Naval Architecture
  • Structural Dynamics.