A practical calculation method of ship maneuvering motion

Inoue, Shota; Hirano, Masayoshi; Kijima, Katsuro; Takashina, J

doi:10.3233/isp-1981-2832502

Cited by 94 publications

(43 citation statements)

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“…In the report, the concept for maneuvering simulations was mainly described, but concrete simulation model was not described in detail. According to MMG model concept, afterward, concrete methods including expression of hydrodynamic forces acting on ships were presented by Ogawa and Kasai [2], Matsumoto and Suemitsu [3], Inoue et al [4] and so on. Nowadays, a lot of simulation methods based on MMG model are existing.…”

Section: List Of Symbolsmentioning

confidence: 99%

Introduction of MMG standard method for ship maneuvering predictions

2014

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A lot of simulation methods based on Maneuvering Modeling Group (MMG) model for ship maneuvering have been presented. Many simulation methods sometimes harm the adaptability of hydrodynamic force data for the maneuvering simulations since one method may be not applicable to other method in general. To avoid this, basic part of the method should be common. Under such a background, research committee on ''standardization of mathematical model for ship maneuvering predictions'' was organized by the Japan Society of Naval Architects and Ocean Engineers and proposed a prototype of maneuvering prediction method for ships, called ''MMG standard method''. In this article, the MMG standard method is introduced. The MMG standard method is composed of 4 elements; maneuvering simulation model, procedure of the required captive model tests to capture the hydrodynamic force characteristics, analysis method for determining the hydrodynamic force coefficients for maneuvering simulations, and prediction method for maneuvering motions of a ship in fullscale. KVLCC2 tanker is selected as a sample ship and the captive mode test results are presented with a process of the data analysis. Using the hydrodynamic force coefficients presented, maneuvering simulations are carried out for KVLCC2 model and the fullscale ship for validation of the method. The present method can roughly capture the maneuvering motions and is useful for the maneuvering predictions in fullscale.

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confidence: 99%

Introduction of MMG standard method for ship maneuvering predictions

2014

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“…However, such experimental data are obtained rarely and, as a bypass solution, these coefficients can be chosen to provide asymptotic equivalence to polynomial models devised for moderate manoeuvres. These polynomial models can be developed specifically for the given hull or borrowed from some database method, like that by Inoue et al [19]. These models are normally written in terms of primed variables v , r but can be re-written in terms of ˇ and r :…”

Section: Hydrodynamic Hull Forcesmentioning

confidence: 99%

“…As to the surge force, it turned out that the most convenient approach is to transform the surge force model suggested by Inoue et al [19]. Besides moving from the dimensional to the dimensionless form, the structure was corrected in such a way that the surge force vanishes when the ship is rotating on the spot independently of the drift angle (strictly speaking, there will be some nonzero surge force for a ship without midship symmetry but obviously it will not be significant and in case of absence of experimental data should be better zeroed).…”

Section: Hydrodynamic Hull Forcesmentioning

confidence: 99%

“…where R T (u) is the total resistance curve as function of the surge velocity and defined for both positive and negative argument, r AS is the astern correction coefficient, C m ≈ 0.625 is the correction factor [19]. As the drag curve in astern motion is usually unavailable and not supported with standard resistance prediction methods [20], it was assumed here to be odd i.e.…”

Section: Hydrodynamic Hull Forcesmentioning

confidence: 99%

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Development of a core mathematical model for arbitrary manoeuvres of a shuttle tanker

Sutulo

Soares

2015

Applied Ocean Research

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“…The rudder lift coefficient was defined as = 2 2 /( 2 ) where 2 is the side force delivered by the rudder, is the rudder projected area, and is the velocity of the flow over the rudder. The experimentally determined lift coefficient is compared to the formulation of Bertram [18] and Inoue et al [19] in Fig. 4.…”

Section: Modules Of the Simulation Modelmentioning

confidence: 99%

Theory and Experiments of a Free-Running Fishing Vessel in Stern Sea

Thys

Faltinsen

2014

Volume 7: Ocean Space Utilization; Professor Emeritus J. Randolph Paulling Honoring Symposium on Ocean Technology

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Hydrodynamic aspects of a modern fishing vessel during manoeuvring in a seaway was studied theoretically and experimentally. The focus was on small frequencies of encounter, corresponding to following and stern quartering seas, where fishing vessels are susceptible to capsize. The numerical model was based on de Kat and Paulling [1]. The model combined a 6 degrees of freedom (DOF) blended seakeeping model with a 4 DOF non-linear manoeuvring model. The 3D non-linear Froude-Krylov and restoring loads were computed by pressure integration up to the incident free surface. The added mass, damping and wave diffraction loads were obtained by generalizing the STF (Salvesen et al. [2]) strip theory to partly include 3D flow effects by means of WAMIT.The simulated wave-induced surge forces over-estimated the experimentally measured forces by up to 50%. Excessive wave-induced surge forces led to predictions of broaching and surf riding, which did not occur in the experiments. Use of experimentally determined wave-induced surge forces gave good agreement between simulations and experiments. INTRODUCTIONStability against capsizing of ships in heavy seas is important when designing small ships. The most vulnerable headings in heavy seas are following and quartering seas with small frequency of encounter, where broaching can occur.Different methods are available to study ship manoeuvring in a seaway; such as full-scale experiments, model scale experiments, and simulations. The current state of the art to simulate the ship behaviour in a seaway is by use of a simplified mathematical model. Other methods such as CFD require a significant amount of computational time compared to

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A practical calculation method of ship maneuvering motion

Cited by 94 publications

References 0 publications

Introduction of MMG standard method for ship maneuvering predictions

Introduction of MMG standard method for ship maneuvering predictions

Development of a core mathematical model for arbitrary manoeuvres of a shuttle tanker

Theory and Experiments of a Free-Running Fishing Vessel in Stern Sea

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