Avaliação de procedimentos para a estimativa de coeficientes não lineares de amortecimento de roll de navios petroleiros

Translated title of the contribution: Evaluation of procedures for estimating nonlinear roll damping coefficients of oil tankers

Mauro Oliveira, Marcelo de Almeida Santos Neves, Paulo de Tarso Esperança, Claudio Alexis Rodriguez castillo, Luiz Cristovão Gomes Coelho, Bruno de Barros Mendes Kassar, Flavia Monteiro, Rafael Santis, Julio Cezar Polo

Research output: Contribution to conferencePaperpeer-review

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 contributionEvaluation of procedures for estimating nonlinear roll damping coefficients of oil tankers
Original languagePortuguese
DOIs
Publication statusPublished - 23 Oct 2018
Event27º Congresso Internacional de Transporte Aquaviário, Construção Naval e Offshore -
Duration: 23 Oct 201825 Oct 2018

Conference

Conference27º Congresso Internacional de Transporte Aquaviário, Construção Naval e Offshore
Period23/10/1825/10/18

Keywords

  • oil tankers
  • roll damping

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