Analysis of roll damping model scale data
Journal article, 2021

Having an accurate prediction of ship roll damping is crucial when analysing roll motions. In this paper, the simplified Ikeda method (SI-method) is compared with the original Ikeda method. The methods are compared using results from a database of roll decay tests carried out on modern merchant ships and a smaller set of predictions in which the original Ikeda method was used. It was found that most of the ships in the database had dimensions outside the limits of the SI-method. Thus, the SI-method showed poor agreement with model tests outside its limits but acceptable agreement for ships within limits. It was found that the deviations were caused by extrapolation errors of the wave-damping in the SI-method. Two ways to improve the accuracy of the SI-method were proposed based on regression, which gave about the same accuracy as the original Ikeda method.

Roll damping

ship motions

roll decay

simplified ikeda’s method

ikeda’s method

Author

Martin Alexandersson

Chalmers, Mechanics and Maritime Sciences

Wengang Mao

Chalmers, Mechanics and Maritime Sciences, Marine Technology

Jonas Ringsberg

Chalmers, Mechanics and Maritime Sciences, Marine Technology

Ships and Offshore Structures

1744-5302 (ISSN) 1754-212X (eISSN)

Vol. 16 sup 1 85-92

DEMOPS - Machine learning based speed-power performance modelling to reduce fuel cost and emissions from shipping

Swedish Transport Administration, 2020-01-01 -- 2024-12-31.

Lighthouse, 2020-01-01 -- 2022-12-31.

Swedish Transport Administration, 2020-01-01 -- 2022-12-31.

Areas of Advance

Information and Communication Technology

Energy

Driving Forces

Sustainable development

Innovation and entrepreneurship

Subject Categories

Applied Mechanics

Computational Mathematics

Vehicle Engineering

Computer Science

Roots

Basic sciences

DOI

10.1080/17445302.2021.1907070

More information

Latest update

8/23/2021