Accession Number:

AD0259810

Title:

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

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s):

Report Date:

1961-04-30

Pagination or Media Count:

36.0

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.

Subject Categories:

  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE