The coefficients of equations of motion were determined by the forced oscillation technique, as a step of improvement of the calculation of lateral motion: namely, sway, yaw and roll, of a ship in waves. The effects of frequency, advance speed and bilge keels on ship motions were clarified experimentally. The experimental values were compared with the calculated ones by the strip method. For the main terms of sway, yaw and roll, except roll damping terms, the both show fairly good agreement. For the coupling terms of sway-yaw, yaw-roll and roll-sway, the both also show comparatively good agreement. It is pointed out that some proper method should be developed for the approximation of the effects of viscous damping, advance speed, bilge keels and frequency of motion to obtain better prediction of the roll damping term. (Author)
Study on Lateral Motions of a Ship in Waves by Forced Oscillation Tests
1973
18 pages
Report
Keine Angabe
Englisch
Marine Engineering , Merchant ships , Lateral stability , Ship models , Oscillation , Damping , Yaw , Equations of motion , Ship hulls , Roll , Japan , Ocean waves
Lateral ship motions and sea loads in waves including appendage and viscous forces
Online Contents | 2000
|On nonlinear ship motions in irregular waves
Engineering Index Backfile | 1966
|