Results 261 to 270 of about 1,145,232 (323)
Several remarks on EFD and CFD for ship roll decay
Ocean Engineering, 2019 Abstract A purpose-built device was designed to obtain high-quality experimental fluid dynamics (EFD) data of ship roll decay motions initially. Then, a model experiment was conducted for a slender ship using the proposed device with an accurate optical fibre gyroscope. A few important remarks on EFD were derived through analyses of the measured data.
Hirotada Hashimoto +5 more
exaly +4 more sources
Ocean Engineering, 2016 The decay motion as well as the harmonic excited roll motion are established techniques to estimate roll damping for ships. This paper compares the advantages and disadvantages of both techniques and focuses on their applicability. Different analysis methods for both techniques to determine the nonlinear roll damping moment are investigated with the ...
Dag-Frederik Feder +1 more
exaly +4 more sources
Ocean Engineering, 2010 Abstract The purpose of this paper is to identify the functional form of the nonlinear roll damping for a particular ship based on an experiment. The problem of damping identification is formulated as an integral equation of the first kind. However, the solution of the problem lacks stability properties, due to the ill-posedness of the first-kind ...
T.S. Jang, Se‐Hun Kwon, J.H. Lee
exaly +4 more sources
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Numerical simulations of free roll decay of DTMB 5415
Ocean Engineering, 2018Abstract Computational fluid dynamics (CFD) that implement finite volume method are offering accurate and precise solutions for ship roll problem. In this study, the free roll decay of the benchmark DTMB 5415 hull with bilge keels in calm water was numerically solved by applying this type of code.
Metin Kemal Gokce, Omer Kemal Kinaci
exaly +4 more sources
Automated processing of free roll decay experimental data
Ocean Engineering, 2015This work presents an efficient numerical and modular approach to assessing viscous roll damping coefficients from free decay tests. In order to reduce the time consumed during analysis, numerical pre-processing of the data without visual inspection is suggested. The method involves breaking down multiple decay motions recorded in a single time series,
Emre Uzunoglu, Carlos Guedes Soares
exaly +3 more sources
Ocean Engineering, 2019 Abstract Experimental and numerical studies were performed to estimate roll damping and hydrodynamic pressure on a 2-D rectangular structure. Free roll decay test was simulated by experiment in 2-D wave tank with Particle Image Velocimetry (PIV) measurement, and by numerical simulations using CFD based on an unsteady incompressible Reynolds-Averaged ...
Mingyu Kim +6 more
semanticscholar +3 more sources
Free roll decay simulation of a polar research vessel with an anti-roll tank based on CFD
Ocean Engineering, 2023 Chao Chen +4 more
semanticscholar +3 more sources
Nonlinear roll damping parameter identification using free-decay data
Ocean Engineering, 2020 Abstract A common practice for evaluating the nonlinear damping in ship roll motion is to perform a free-decay experiment. Although various methods have been developed to estimate the coefficients of a nonlinear damping model, these methods are limited to certain and relatively simple models.
Jinwei Sun +2 more
semanticscholar +3 more sources
Formulation of ship roll damping models from free-decay data
Ocean Engineering, 2023Dong Zhang, Wei Liu
exaly +3 more sources
Numerical investigations on roll decay of a lifeboat in calm water and waves
Ocean EngineeringGisu SONG, jy s
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