EXPERIMENTAL INVESTIGATION OF THE VERTICAL FORCES ACTING ON PROLATE SPHEROIDS IN SINUSOIDAL HEAVE MOTION

Abstract

A planar motion generator for constraining a small ship model to pure sinusoidal motion in any one of several degrees of freedom plus combinations of certain of these, was designed and constructed. The apparatus, briefly described here, was tested for operation in heave motion only. Presented herein are the results of vertical force measurements made for each of three horizontal, prolate spheroids oscillating at various frequencies in a free surface and at different depths of submergence. The measured forces for the surface tests are compared with results obtained by strip calculations. Theoretical values of added mass and damping for a horizontal, semi-immersed, circular cylinder of infinite length oscillating in heave were used in the strip calculations.

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Document Details

Document Type
Technical Report
Publication Date
Apr 30, 1961
Accession Number
AD0259810

Entities

People

  • Thomas C. Watson

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Buoyancy
  • California
  • Differential Equations
  • Electrical Equipment
  • Electronic Equipment
  • Equations
  • Fluid Flow
  • Frequency
  • Government Procurement
  • Linear Differential Equations
  • Measurement
  • Naval Architecture
  • Photographs
  • Ship Model Basins
  • Ship Models
  • United States
  • Universities

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Marine Hydrodynamics
  • Structural Dynamics.