Accession Number : AD0652331

Title :   AN INVESTIGATION OF SOME OF THE FACTORS AFFECTING THE ROLLING OF SHIPS,

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C

Personal Author(s) : Serat,M. E. ; Thews,J. G.

Report Date : FEB 1933

Pagination or Media Count : 44

Abstract : The report describes experiments made to investigate the rolling of ships and in particular to determine the effect on rolling of changes in certain characteristics, which depend upon the form or loading of a ship. In particular, the experiments were intended to indicate the effect on roll of: (1) Variation in vertical position of the center of gravity. (2) Variation in the rolling period. (3) Variation in height of the metacenter above the water plane. (4) Variation in midship-section coefficient. The following is a brief summary of the conclusions: (1) When the center of gravity is raised, damping is increased. (2) When the period is increased, damping is decreased. (3) When the metacenter is raised, damping is increased. (4) When the midship section coefficient is increased, damping is increased. When this coefficient exceeds unity, damping is greatly increased. (5) The amplitude of roll of a ship in synchronous waves may be predicted from its model by the use of methods described. (Author)

Descriptors :   *SHIPS, *ROLL, CENTER OF GRAVITY, SHIP MODELS, DAMPING, STABILIZATION SYSTEMS, SHIP HULLS.

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE