ROLL DYNAMIC COEFFICIENTS APPROACH OF DECAY TEST USING THE GENERALIZED REDUCED GRADIENT METHOD (GRG)

Hasanudin, Achmad Zubaydi*, Wasis Dwi Aryawan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Sea transportation is the vehicle which dominant and vital in the world. The increasing number of ships, types, and uncertain climate change have caused many ship accidents that have caused loss of life and property. The International Maritime Organization (IMO) issued the latest regulation on the second generation of ship stability criteria based on the dynamic of ship roll motions. The survival of dynamic stability depends on the hydrodynamic coefficients, which numerical and experimental calculations can obtain. The problem is finding the hydrodynamic coefficients of the ship roll quickly and accurately from the experimental roll decay data. This paper uses the Generalized Reduced Gradient (GRG) optimization to find the roll motion coefficient with the objective function of a standard deviation. The results show that the roll decay experiment graph is close optimization for variations of the minimum standard deviation used: all data, maximum-minimum amplitude, maximum amplitude, and minimum amplitude. The most similar chart to the experiment is optimization using a standard deviation of maximum-minimum amplitude with the optimal objective function σ = 1.006776 closest σ=1; obtained variable x1 = k44 =0.1087688 m; x2 = B44 =3.00306E-05 m-ton-sec. Based on sensitivity tests for various scenarios, optimization with a standard deviation of maximum amplitude has a high sensitivity, so it is necessary to avoid or be careful in its use. Generally, the GRG optimization method has the advantage of finding the hydrodynamic roll coefficient quickly and accurately.

Original languageEnglish
Article number1091
Pages (from-to)470-480
Number of pages11
JournalJournal of Applied Engineering Science
Volume21
Issue number2
DOIs
Publication statusPublished - 2023

Keywords

  • hydrodynamic coefficients
  • optimization
  • roll decay
  • ship

Fingerprint

Dive into the research topics of 'ROLL DYNAMIC COEFFICIENTS APPROACH OF DECAY TEST USING THE GENERALIZED REDUCED GRADIENT METHOD (GRG)'. Together they form a unique fingerprint.

Cite this