Abstract
The total damping of roll of vessels in a state of the sea is not accurately predicted by the potential theory due to its viscous nature. In this way it is necessary to use experimental or empirical procedures to determine damping. This article performs an evaluation of the procedures for forecasting non-linear roll damping coefficients for use in oil tankers and FPSOs. The methods analyzed are of experimental origin, obtained from the tests of decay (logarithmic decrement and energy) and empirical tests based on the work of Ikeda. The coefficients obtained are then used in computer simulation programs and compared with the experimental results of tests performed in Laboceano/UFRJ. The coefficients are compared with nonlinear simulations in the time domain and with linear simulations in the frequency domain. Conclusions are established on the validity and use ranges of the coefficients obtained in each procedure and its future application in the 2nd Generation of the Intacta Stability Criterion under discussion at IMO.
Translated title of the contribution | Evaluation of procedures for estimating nonlinear roll damping coefficients of oil tankers |
---|---|
Original language | Portuguese |
DOIs | |
Publication status | Published - 23 Oct 2018 |
Event | 27º Congresso Internacional de Transporte Aquaviário, Construção Naval e Offshore - Duration: 23 Oct 2018 → 25 Oct 2018 |
Conference
Conference | 27º Congresso Internacional de Transporte Aquaviário, Construção Naval e Offshore |
---|---|
Period | 23/10/18 → 25/10/18 |
Keywords
- oil tankers
- roll damping