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On Application of Standard Methods for Roll Damping Prediction to Ships with High Block Coefficient
2023Proper estimation of roll damping moment is of paramount importance for adequate assessment of dynamic stability of ships. However, experimental data on roll damping of inland vessels are scarce and unreliable. Thus, the applicability of the classic Ikeda’s method and its simplified version on typical European inland vessels is investigated, with ...
Rudaković, Stefan, Bačkalov, Igor
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Damping and Inertia Coefficients for a Rolling or Swaying Vertical Strip
Journal of Ship Research, 1963Ursell's exact expression3 for the wave-amplitude coefficient for a swaying or rolling vertical strip is evaluated numerically over the entire frequency range. The added-mass and inertia coefficients are then obtained numerically, also over the entire frequency range, via the Kramers-Kronig relations.
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Volume 5: Ocean Engineering, 2023
Abstract Autonomous shipping is inevitably the future of sea transportation which requires accurate decision-making systems. Analysis of big data as a key element to develop these decision-making systems is much easier than before. The precise prediction of vessel roll response, as a critical component of ship motions, by directly ...
Mohammadreza Javanmardi +2 more
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Abstract Autonomous shipping is inevitably the future of sea transportation which requires accurate decision-making systems. Analysis of big data as a key element to develop these decision-making systems is much easier than before. The precise prediction of vessel roll response, as a critical component of ship motions, by directly ...
Mohammadreza Javanmardi +2 more
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Ocean Engineering, 2020
Abstract Roll damping is one of the most important parameters in the assessment of the behavior of floating systems in waves, but its prediction is still an open issue. Despite the greater improvements achieved with the advent of computational fluid dynamics, the estimation of roll damping is still highly dependent on experiments.
Claudio A. Rodríguez +3 more
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Abstract Roll damping is one of the most important parameters in the assessment of the behavior of floating systems in waves, but its prediction is still an open issue. Despite the greater improvements achieved with the advent of computational fluid dynamics, the estimation of roll damping is still highly dependent on experiments.
Claudio A. Rodríguez +3 more
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2023
A finite-volume method (FVM) is used to simulate the roll motion of an ellipsoid equipped with wall-bounded flat plates with and without forward speed. Due to the circular form and a fixed roll axis of the simulated ellipsoid, only normal forces act on the plates. The normal force component in phase with the roll velocity over a harmonic roll period is
Wassermann, Sven +1 more
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A finite-volume method (FVM) is used to simulate the roll motion of an ellipsoid equipped with wall-bounded flat plates with and without forward speed. Due to the circular form and a fixed roll axis of the simulated ellipsoid, only normal forces act on the plates. The normal force component in phase with the roll velocity over a harmonic roll period is
Wassermann, Sven +1 more
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Estimation of Roll Damping Coefficients Based on Model Tests Responses of a FPSO in Waves
Volume 7B: Ocean Engineering, 2019Abstract Roll damping estimation is of great concern for the prediction of motions in waves of ship and offshore platforms, especially when viscous effects are relevant. Although this problem dates back to the times of William Froude, it has regained much attention in the context of the development of the second-generation intact ...
Claudio A. Rodríguez +2 more
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Estimation of nonlinear damping coefficients from large-amplitude ship rolling motions
Applied Ocean Research, 1995A new asymptotic method is applied to the analysis of roll decrement data which can determine nonlinear damping coefficients from large-amplitude roll motions. The roll restoring moment can be strongly nonlinear. The accuracy of the method is assessed by rolling with an initial amplitude, using given nonlinear equations of motion.
H.S.Y. Chan, Z. Xu, W.L. Huang
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High-Alpha Prediction of Roll Damping and Magnus Stability Coefficients for Finned Projectiles
Journal of Spacecraft and Rockets, 2016The roll damping and Magnus dynamic stability coefficients, as well as total force and moment coefficients, were numerically computed at high angles of attack up to 90 deg for two generic fin-stabilized flight munitions at a supersonic Mach number of 2.49.
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Non-linear damping coefficients from an asymmetric roll decay time series: An analytical method
Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 2004A method to extract non-linear ship roll damping coefficients from an asymmetric roll decay record is developed by following an analytical route. Customarily, the existence of bias in the roll equation is dealt with either through a constant term in the external forcing or through an asymmetric restoring. With suitable variable transformations and time
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Tuning of Roll Damping Coefficient of Underwater Vehicle Using Sea Trial Results
Journal of the KNST, 2023Chul Hyun +3 more
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