Готові списки джерел за темами / Ship maneuvering

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Добірка наукової літератури з теми "Ship maneuvering"

Автор: Grafiati

Опубліковано: 7 червня 2022

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Статті в журналах з теми "Ship maneuvering"

Nedelcu, A. "Ship Maneuvering Prediction based Pivot Point Estimation." Scientific Bulletin of Naval Academy XXI, no. 2 (December 15, 2018): 81–86. http://dx.doi.org/10.21279/1454-864x-18-i2-008.

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In the last years, the size and the number of ships has grown remarkably. At the same time, the size of harbors and ports remain constantly. Asa result, the ship maneuvering in harbors has become more problematic and harder to execute. This is the reason that many sailors affirm that it is an art than a science to execute some maneuverings. Ship maneuvers represented a complex vessel motions influenced most of the time by external environmental conditions in the navigation area (i.e. ocean and tidal current conditions, water depth, wind and waves). Navigator`s knowledge and experiences overcome to control the ship speed, course and heading in some close encounter situations. For example, combinations of different environmental conditions (draft variations in a passage from fresh to sea water with other ships near the same navigation area), create not only additional navigation difficulties, but also could compromise and threatens the navigation.

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Zhang, Zhao, and Junsheng Ren. "Locally Weighted Non-Parametric Modeling of Ship Maneuvering Motion Based on Sparse Gaussian Process." Journal of Marine Science and Engineering 9, no. 6 (June 1, 2021): 606. http://dx.doi.org/10.3390/jmse9060606.

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This paper explores a fast and efficient method for identifying and modeling ship maneuvering motion, and conducts a comprehensive experiment. Through the ship maneuvering test, the dynamics interaction between ship and the environment is obtained. Then, the LWL (Locally Weighted Learning algorithm) underlying architecture is constructed by sparse Gaussian Process to reduce the data requirements of LWL-based ship maneuvering motion modeling and to improve the performance for LWL. On this basis, a non-parametric model of ship maneuvering motion is established based on the locally weighted sparse Gaussian Process, and the traditional mathematical model of ship maneuvering motion is replaced by the generative model. This generative model considers the hydrodynamic effects of ships, and reduces the sensitivity of local weighted learning to sample data. In addition, matrix operations are transferred to the auxiliary platform to optimize the calculation performance of the method. Finally, the simulation results of ship maneuvering motion indicate that this method has the characteristics of efficiency, rapidity and universality, and its accuracy conforms to engineering practice.

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Li, Dong Li, Liang Yang, Hong Yu Zhang, and Tian Shu Peng. "Numerical Simulation of Ship Maneuvering Motions in Viscous Flow." Key Engineering Materials 419-420 (October 2009): 677–80. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.677.

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In this paper, based on CFD method and dynamic mesh technology, the ship maneuvering performance is predicted in viscous flow. Numerical computation models are built to realize the simulation of the ship maneuvering motions such as static drift test, static rudder test, pure yaw test and pure sway test. Hydrodynamic forces and moments acting on a maneuvering ship are obtained in the body-fixed coordinate system. The computational results are compared with data of potential theory method. Then based on VC code, a simulator of ship maneuvering motions is built to simulate ship Zigzagging and Turing test. The results show that the present numerical simulation method and the ship maneuvering motion simulator are able to be used in numerical simulation of the real size ship maneuvering motions in viscous flow field.

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Li, Ye, and Sander M. Çalisal. "Numerical Simulation of Ship Maneuverability in Wind and Current, With Escort Tugs." Marine Technology and SNAME News 42, no. 04 (October 1, 2005): 159–76. http://dx.doi.org/10.5957/mt1.2005.42.4.159.

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Анотація:

A number of recent large-ship accidents have compelled naval architects and engineers to advance the research on ship maneuverability and the prediction of ship response in the ocean environment. In the meantime, new maneuverability standards have been developed and the International Maritime Organization (IMO) has also proposed one such standard. This standard provides four ship-maneuvering performance criteria, and its latest version is dated December 2002. Simulation technology, in particular the simulation of ship maneuvering, has advanced considerably in recent years with the advent of computers. Computer programs using either numerically computed or experimentally determined hydrodynamics coefficients have allowed an accurate simulation of ship maneuverability for different types of vessels. Relatively good agreement has been reported by various researchers between simulated results and those obtained from full-scale ship trials. It seems that simulation can now identify acceptable ship maneuvering performance in calm seas. However, the effects of wind and current and escort tug assistance have not been that well studied and reported, and they are always important factors for ship maneuvering especially in restricted waters. The numerical simulation program presented in this paper (UBCManeuver) has been validated using data on the Esso Osaka 278,000 DWT tanker, a ship well tested for regular maneuvering tests. UBCManeuver is able to identify IMO class and non-IMO class ships according to the most recent IMO standards for ship maneuverability. A good agreement was obtained between simulation and the sea trials reported for Esso Osaka. After the validation of the code, the course-keeping abilities of this ship in restricted waters were studied in calm seas and under wind and current conditions. The effect of escort tugs on such an operation has also been quantified and Esso Osaka's maneuvering performance around Vancouver harbor simulated. The limits of current and wind strengths for "successful" operation with and without escort tugs have then been established. In addition, the effectiveness of multiple tug assistance in different positions is discussed in some detail.

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Wu, Gongxing, Xiaolong Zhao, Yushan Sun, and Linling Wang. "Cooperative Maneuvering Mathematical Modeling for Multi-Tugs Towing a Ship in the Port Environment." Journal of Marine Science and Engineering 9, no. 4 (April 4, 2021): 384. http://dx.doi.org/10.3390/jmse9040384.

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The towing operation of multi-tug-assisted ship navigation mainly relies on the experience of the captain, and there is no set of effective operation methods. Therefore, it is difficult to achieve accurate assisted navigation when multiple tugboats work in coordination. The calculation method of maneuverability of the towing system with multi-tug-assisted navigation is proposed in this paper. In view of the complexity of multi-tug-assisted large ship maneuvering, this article focuses on solving the problems of force analysis and maneuvering modeling between the multi-tug and ship systems. Firstly, a maneuvering mathematic model for towing ships is established, and the hydrodynamic force of the hull, rope force of the tugs, and force of wind interference are analyzed. The thrust and moment of the ducted azimuthal propeller are calculated, and the mathematical model of the tug’s cable tension is discussed. Then, the fourth-order Runge–Kutta method is used to solve the differential equations of the maneuvering motion of the ships and each tug. Based on the ship-towing process by multiple tugs, a multi-tug-assisted ship towing simulation platform was built by using the Visual Studio development tool. Finally, on the simulation platform, multi-tug longitudinal-towing-simulation experiments at different speeds were carried out, and the simulation of turning towing maneuvers under the influence of wind was done. The simulation results showed that as the towing speed increases, the initial towing speed fluctuates greatly. There is a significant drift effect on the ships by the wind force. And the wind will cause a fluctuation in the tug’s rope force. The simulation of the multi-tugs towing a ship entering the port was carried out in the port environment. The results showed that the multi-tug towing system and simulation platform may be used for the safety training of the tug’s crew.

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Galor, Wiesław. "Determination of Dynamic Under Keel Clearance of Maneuvering Ship." Journal of Konbin 8, no. 1 (January 1, 2008): 53–60. http://dx.doi.org/10.2478/v10040-008-0100-0.

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Determination of Dynamic Under Keel Clearance of Maneuvering Ship The safety of navigation of a ship manoeuvring within port waters mainly depends on its under keel clearance (UKC). Mainly UKC depends on water level change, squatting of moving ship and heeling and wave response. The effect of these components will be determined currently than such UKC is called as dynamic under keel clearance. The paper presents an analysis of certain components of UKC to maximise of ship draft and thus to achieve the economic benefit to port and ships owner.

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Song, Hao Ran. "Study on Application in the Teaching of Ship Maneuvering Simulator." Applied Mechanics and Materials 310 (February 2013): 580–83. http://dx.doi.org/10.4028/www.scientific.net/amm.310.580.

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Ship handling Simulator system was dominated by computer technology, combined with disciplines such as ship hydrodynamics, to emulate a variety of sea and sea conditions, various types of ships and its control system, achieve the purpose of simulation training. At present, the ship manoeuvring Simulator in navigational teaching and training not only from the international shipping industry is generally acceptable, but also highly valued by the International Maritime Organization. Therefore, growing on ship manoeuvring Simulator in navigational teaching research on the application and training of the crew, ship maneuvering simulator training more rational, more realistic, more standardized.

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Lee, Hyeong-Tak, Jeong-Seok Lee, Hyun Yang, and Ik-Soon Cho. "An AIS Data-Driven Approach to Analyze the Pattern of Ship Trajectories in Ports Using the DBSCAN Algorithm." Applied Sciences 11, no. 2 (January 15, 2021): 799. http://dx.doi.org/10.3390/app11020799.

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Анотація:

As the maritime industry enters the era of maritime autonomous surface ships, research into artificial intelligence based on maritime data is being actively conducted, and the advantages of profitability and the prevention of human error are being emphasized. However, although many studies have been conducted relating to oceanic operations by ships, few have addressed maneuvering in ports. Therefore, in an effort to resolve this issue, this study explores ship trajectories derived from automatic identification systems’ data collected from ships arriving in and departing from the Busan New Port in South Korea. The collected data were analyzed by dividing them into port arrival and departure categories. To analyze ship trajectory patterns, the density-based spatial clustering of applications with noise (DBSCAN) algorithm, a machine learning clustering method, was employed. As a result, in the case of arrival, seven clusters, including the leg and turning section, were derived, and departure was classified into six clusters. The clusters were then divided into four phases and a pattern analysis was conducted for speed over ground, course over ground, and ship position. The results of this study could be used to develop new port maneuvering guidelines for ships and represent a significant contribution to the maneuvering practices of autonomous ships in port.

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PHAM, Van Thuan, and Hiroaki KOBAYASHI. "Evaluation of Container Ship Maneuvering Characteristics from View Point of Ship Handling Ability." Journal of Japan Institute of Navigation 118 (2008): 283–89. http://dx.doi.org/10.9749/jin.118.283.

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Yim, Jeong-Bin, and Deuk-Jin Park. "Estimating Critical Latency Affecting Ship’s Collision in Re-Mote Maneuvering of Autonomous Ships." Applied Sciences 11, no. 22 (November 19, 2021): 10987. http://dx.doi.org/10.3390/app112210987.

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Estimation of the critical latency that can cause collision in remote maneuvering of autonomous ships can provide a clue to avoid collisions. The concept of estimating the critical latency was established using the turning circle formed by the turning maneuver of the own ship, and critical latency was estimated using the radius of the turning circle with the turning time ratio. The turning circle was observed using the turning trajectory of the give-way vessel measured in the ship maneuvering simulation experiment. Experimental results demonstrated that the proposed method is capable of identifying both the location and time of the collision due to critical latency. As a result, a clue to avoid possible collision in remote maneuvering caused by critical latency was deduced.

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Дисертації з теми "Ship maneuvering"

Pakkan, Sinan. "Modeling And Simulation Of A Maneuvering Ship." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608933/index.pdf.

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This thesis documents the studies conducted in deriving a mathematical model representing the dynamics of a maneuvering ship to be implemented as part of an interactive real-time simulation system, as well as the details and results of the implementation process itself. Different effects on the dynamics of ship motions are discussed separately, meaning that the effects are considered to be applied to the system one at a time and they are included in the model simply by the principle of superposition. The model is intended to include the hydrodynamic interactions between the ship hull and the ocean via added mass (added inertia), damping and restoring force concepts. In addition to these effects, which are derived considering no incident waves are present on the ocean, the environmental disturbances, such as wind, wave and ocean current are also taken into account for proposing a mathematical model governing the dynamics of the ship. Since the ultimate product of this thesis work is a running computer code that can be integrated into an available simulation software, the algorithm development and code implementation processes are also covered. Improvements made on the implementation to achieve &ldquo
better&rdquo
real-time performance are evaluated comparatively in reference to original runs conducted before the application of improvement under consideration. A new method to the computation of the wave model that allows faster calculation in real-time is presented. A modular programming approach is followed in the overall algorithm development process in order to make the integration of new program components into the software, such as a new hull or propulsion model or a different integrator type possible, easily and quickly.

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LaFontant, Patrick B. "Development and assessment of a ship maneuvering simulation model." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA306194.

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Thomas, Brian S. S. M. Massachusetts Institute of Technology. "Optimal control theory applied to ship maneuvering in restricted waters." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33591.

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Анотація:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.
Includes bibliographical references (leaves 70-71).
Ship drivers have long understood that powerful interaction forces exist when ships operate in close proximity to rigid boundaries or other vessels. Controlling the effects of these forces has been traditionally handled by experienced helmsmen. The purpose of this research is to apply modern optimal control theory to these maneuvering scenarios in order to show that helmsman may some day be replaced by modern controllers. The maneuvering equations of motion are cast in a linear state space framework, permitting the design of a linear quadratic (LQ) controller. In addition, the hydrodynamic effects are modeled using potential flow theory in order to simulate the interaction forces and test the efficacy of the controller. This research demonstrates that the linear quadratic regulator effectively controls ship motions due to the presence of a boundary or other vessel over a broad range of speeds and separation distances. Furthermore, the method proposed provides stable control in the presence of additional. stochastic disturbances.
by Brian S. Thomas.
S.M.

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Betancourt, Michelle K. "A comparison of ship maneuvering characteristics for rudders and podded propulsors." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FBetancourt.pdf.

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Xing-Kaeding, Yan. "Unified approach to ship seakeeping and maneuvering by a RANSE method." Hamburg Arbeitsbereiche Schiffbau, Techn. Univ. Hamburg-Harburg, 2006. http://doku.b.tu-harburg.de/volltexte/2006/303/.

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Du, Peng. "Numerical modeling and prediction of ship maneuvering and hydrodynamics during inland waterway transport." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2459.

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Анотація:

Dans cette thèse, l'hydrodynamique des navires lors du transport par voies navigables et des manœuvres sont étudiées à l'aide de la CFD (Computational Fluid Dynamics) basée sur OpenFoam. Des études de validation et de vérification sont réalisées pour la convergence de maillage, la convergence de pas de temps, la sensibilité aux modèles de turbulence et les techniques de maillage dynamique. Un solveur de mouvement 6DoF basé sur quaternion est mis en œuvre pour les prédictions d'assiette et d'enfoncement. Les effets environnementaux sur plusieurs bateaux de navigation intérieure (convoi 1, convoi 2, automoteur) sont étudiés à l'aide de modèles numériques validés. Trois aspects importants sont simulés: l'effet de confinement de la voie navigable, le croissement et l'interaction bateau-pile de pont. Les conditions d’essai couvrent un large éventail, y compris les différentes dimensions du canal, la profondeur de l’eau, le tirant d'eau et la vitesse. La résistance du navire, le type de vague, l’angle de Kelvin et l’élévation de la vague à des positions spécifiques sont étudiés en fonction de ces paramètres. La manœuvre des navires est étudiée à l’aide de tests de modèles captifs virtuels basés sur le modèle MMG (Mathematical Maneuvering Group). Un disque d'actionneur est implémenté pour remplacer l'hélice réelle. Les tests d'un modèle KVLCC2 sont effectués pour obtenir les coefficients hydrodynamiques de l'hélice, du gouvernail et de la coque du navire. En utilisant les coefficients obtenus, des simulations de manœuvre sont effectuées et validées. Ces études reproduisent des tests de navires réels et prouvent ainsi la validité de nos modèles numériques. En conséquence, le solveur numérique est prometteur dans les simulations d'hydrodynamique des navires et d'ingénierie marine
In this thesis, the ship hydrodynamics during inland waterway transport and ship maneuvering are investigated using CFD (Computational Fluid Dynamics) based onOpenFoam. Validation and verification studies are carried out for the mesh convergence, time step convergence, sensitivity to turbulence models and dynamic mesh techniques. A quaternion-based 6DoF motion solver is implemented for the trim and sinkage predictions. Environmental effects on several inland vessels (convoy 1, convoy 2, tanker) are studied using the validated numerical models. Three important aspects, the confinement effect of the waterway, head-on encounter and ship-bridge pile interaction are simulated. The testing conditions cover a wide range, including various channel dimensions, water depths, ship draughts and speeds. The ship resistance, wave pattern, Kelvin angle and wave elevation at specific positions are investigated as functions of these parameters. Ship maneuvering is investigated using virtual captive model tests based on the MMG (Mathematical Maneuvering Group) model. An actuator disk is implemented to replace the real propeller. Open water test, rudder force test, OTT (Oblique Towing Tank test) and CMT (Circular Motion Test) of a KVLCC2 model are carried out to obtain the hydrodynamic coefficients of the propeller, rudder and ship hull. Using the obtained coefficients, system-based maneuvering simulations are carried out and validated using the free running test data. These studies reproduce real ship tests and thus prove the validity of our numerical models. As a result, the numerical solver is promising in ship hydrodynamics and marine engineering simulations

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Kizakkevariath, Sankaranarayanan. "Hydrodynamic analysis and computer simulation applied to ship interaction during maneuvering in shallow channels." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54219.

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Анотація:

A generalized hydrodynamic interaction force model is combined with a ship maneuvering simulator to provide a free-running, closed loop ship simulation capable of trajectory predictions of ships operating in close proximity in a shallow, asymmetric canal. The interaction force model is based on the generalized Lagally's theorem, properly accounting for the orientations and dynamic motions of the ships. Also included are the lift forces and the cross-flow drag forces, which are found to be important for bank suction phenomena. A simplified method is implemented for box shapes, applicable for barge-tows operating in rivers. Results of the calculations are found to be generally in good agreement with experimental and other theoretical results. This work would have utility in studying maneuvers involving ships and barges in close proximity and can be used in training pilots who operate in canals, harbors and rivers, and also in studying the effects of various steering control systems in the early design stages.
Ph. D.

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Xing-Kaeding, Yan [Verfasser]. "Unified approach to ship seakeeping and maneuvering by a RANSE method / von Yan Xing-Kaeding." Hamburg : Arbeitsbereiche Schiffbau, Techn. Univ. Hamburg-Harburg, 2006. http://d-nb.info/980303303/34.

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Mofidi, Alireza. "Ship maneuvers with discretized propeller and coupled propeller model/CFD." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5814.

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Анотація:

A high fidelity computational fluid dynamics approach to perform direct simulations of ship maneuvers is presented in this thesis. The approach uses dynamic overset grids with a hierarchy of bodies to enable arbitrary motions between objects, and overcome the difficulties in simulation of the moving rudder and rotating propeller. To better resolve propeller/rudder interaction a Delayed Detached Eddy Simulation turbulence model based on Menter’s SST is used. The methodology was implemented in the general purpose RANS/DES/DDES research code REX, and is applied to the KRISO Container Ship (KCS) with moving rudder and rotating propeller in deep and shallow water. For the first time, a grid study is conducted for the self-propulsion condition for the propeller RPM, thrust, torque and lateral force, and for the roll and pitch motions, using grids of 8.7 (coarse), 24.6 (medium) and 71.3 (fine) million points. A grid study is also performed for the zigzag maneuver evaluating the maximum and minimum values of propeller thrust, torque and lateral force roll, pitch, yaw, roll rate, yaw rate and drift throughout the maneuver. An extensive comparison between predicted motions and forces of the direct simulations and the experimental data collected by Schiffbau-Versuchsanstalt Potsdam GmbH (SVA) and Flanders Hydraulics Research (FHR) are presented. While the results and comparisons with experimental data show that using direct CFD to compute modified and standard maneuvers with moving rudder and rotating discretized propeller is feasible, computational cost remains an impediment for many practical applications. Coupling a dynamic overset CFD solver with a potential propeller code can dramatically reduce the computational time to perform maneuvering simulations by using one order of magnitude larger time step than direct simulation. This thesis investigates the ability of a coupled CFD/potential propeller code approach to simulate maneuvers in ships, where the rudder is located downstream of the propeller. While the approach has been successfully applied to submarine maneuvers, in which the propeller wake is free of interference, the concept had not been evaluated before for cases where an object (the rudder) is immersed in the wake. The study is performed using the CFD code REX and the propeller code PUF-14. Performance of the coupled REX/PUF-14 approach is first tested studying propeller/rudder interaction, evaluating influence of the propeller/rudder gap size and rudder deflection on propeller performance curves and rudder forces, comparing against DDES simulations with a discretized rotating propeller. A grid study was performed for advance coefficient J=0.6 and a rudder angle δ=20 degrees for a propeller rudder gap of 0.2 times the rudder radius, with the resulting grid uncertainties for propeller thrust and torque coefficients suggesting that the effects of the grid changes are small for the present range of grid sizes. A 15/1 zigzag maneuver for the KCS container ship, in which case the rudder is very close downstream of the propeller, is then analyzed, and compared against discretized propeller simulations and experimental data. Self-propulsion coupled REX/PUF-14 results agree very well with experiments and discretized propeller simulations. Prediction of motions, forces and moments, and mean flow field with the coupled REX/PUF-14 approach are comparable to results obtained with discretized propeller simulations and agree with experiments well, though as implemented the coupled approach is unable to resolve tip vortices and other flow structures that interact with the rudder, potentially affecting prediction of flow separation. It can be concluded that coupled CFD/potential flow propeller approaches are an effective and economical way to perform direct simulation of surface ship maneuvers with CFD.

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Silva, Gustavo Oliveira. "Implementação de efeitos de interação hidrodinâmica navio-navio e navio-margem em simuladores de manobras em tempo real." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-03082017-103227/.

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Modelos de Simulador de Manobras de Navios em Tempo Real vem se tornando cada vez mais comuns e necessários na análise de viabilidade de portos e canais de acesso. O aumento do porte das embarcações, não acompanhado por equivalente aumento das dimensões dos portos, faz com que cada vez mais os efeitos de águas rasas e interação com margens e estruturas portuárias se tornem relevantes durante uma manobra. Com o intuito de aumentar a gama de aplicação desse tipo de simulador, o presente trabalho aborda uma modelagem matemática para estimar as forças hidrodinâmicas de interação com as margens e outros navios para aplicação em simuladores de manobras. O modelo usa, como base, dados oriundos de um método numérico validado experimentalmente, o Método dos Elementos de Contorno. Baseado nesse método, alguns casos tipo foram selecionados para gerar um banco de dados e um modelo matemático foi desenvolvido para estimar as forças de interação, extrapolando as respostas obtidas para casos não previstos anteriormente. A obtenção das forças através do modelo é baseada em alguns parâmetros de entrada, tais como velocidade de avanço da embarcação e as distâncias relativas entre o navio e o meio. Assim, aplica-se uma série de medidas para determinar geometrias aproximadas do meio e/ou posição de outros navios em um dado instante. Foi realizada uma verificação do modelo para casos não previstos, avaliando os erros associados à modelagem e sua aplicabilidade. Os erros foram considerados aceitáveis para as condições impostas, visto as aplicações existentes em simuladores de manobras. Além disso, o modelo desenvolvido foi executado no simulador de manobras, no qual foram realizados alguns testes de sensibilidade ao movimento, além de algumas comparações com outros trabalhos, quando possível.
Real-time Ship Maneuvering Simulator models are becoming more common and necessary in the feasibility analysis of ports and access channels. The constant increase in the length and draught of vessels, not followed by equivalent ports development, makes the effects of shallow water, ship-bank and ship-port interaction with other structures more relevant during a maneuver. In order to increase the application range of this kind of simulator, the present work develops a mathematical model to estimate ship-bank and ship-ship hydrodynamic interaction forces and moments during a maneuver. The model uses, as a reference, data derived from an experimentally validated numerical method, the Boundary Element Method (BEM). Based on this method, some reference cases were selected to generate a database which would be used by our mathematical model to extrapolate results and estimate the interaction forces for any unexpected scenario. The forces obtained through the model are based on some input parameters, such as the vessel forward speed and the relative distances between the ship and bank and other ships. Thus, a series of measurements were developed to determine approximate geometries of the port and/or position of other ships at a given time slot. A model verification was performed for some unexpected scenarios, evaluating the errors associated with the model and its application. By taking similar works developed in maritime simulators as a comparison point, the errors obtained in our mathematical model were considered acceptable. The developed model was implemented in the ship maneuvering simulator located at TPN-USP, where some movement sensitivity tests were performed as well as some comparisons with other works, whenever possible.

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Книги з теми "Ship maneuvering"

The dynamics of marine craft: Maneuvering and seakeeping. Singapore: World Scientific Pub. Co., 2004.

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The dynamics of marine craft: Maneuvering and seakeeping. New Jersey: World Scientific, 2004.

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Kalinichenko, Evgeny. Theory and methods for calculating the inertial-braking characteristics of a ship. «Scientific Route» OÜ, 2020. http://dx.doi.org/10.21303/978-617-7319-30-5.

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One of the most serious problems of modern navigation is the accident rate that occurs due to inept or belated maneuvering of ships. As a result of accidents in the world, more than 200 ships die every year and every fourth receives significant damage. Full-scale tests show that the stopping distance of large-tonnage ships turn out to be much less permissible, and shipbuilders are able to significantly reduce the astern power of such ships, making them cheaper at the expense of safety. The low accuracy of inertial-braking characteristics is mainly due to unqualified field tests. Analysis of graphs and tables based on the results of such tests show that the spread in the values of inertial-braking characteristics for ships of the same type reaches 30%, and in some cases even more. In many tables and graphs, inertial-braking characteristics are expressed in relative values and are not suitable for direct use when maneuvering a ship. Finally, even when graphical and/or tabular maneuvering information is available on the navigating bridge, it is difficult to use it when maneuvering a ship at night. The research carried out by the author results in: - creation of an alternative computational method for determining the inertial-braking characteristics of the ship, suitable for use on any on-board computer; - development of an improved methodology for calculating the path and time of acceleration and braking of the ship in various ahead motion modes; - development of a methodology for taking into account the influence of a passing and opponent current on the length of the stopping distance of the ship; - development of methods for solving applied problems, ensuring a decrease in the accident rate of ships during maneuvering. The obtained methods include the development of theoretical foundations, mathematical models and comparison of the calculated inertial-braking characteristics of ships with the data of a full-scale experiment. For the first time, to derive the calculated formulas for the time and stopping distance, theorems are used on the change in the momentum and kinetic energy during accelerated and decelerated motion of the ship. In the course of the study, the problems of calculating and formalizing the inertial-braking characteristics of the ship are being comprehensively solved. For the first time, the hypothesis that the nature of the change in the thrust force of the propeller during reverse can be approximated by linear equations has been substantiated and confirmed. The general results are used to calculate the inertial-braking characteristics of specific ships.

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A Comparison of Ship Maneuvering Characteristics for Rudders and Podded Propulsors. Storming Media, 2003.

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Lewandowski, Edward M. The Dynamics of Marine Craft: Maneuvering and Seakeeping. World Scientific Publishing Company, 2003.

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Lewandowski, Edward M. The Dynamics of Marine Craft: Maneuvering and Seakeeping. World Scientific Publishing Company, 2003.

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Частини книг з теми "Ship maneuvering"

Stec, Andrzej. "Ship Maneuvering Model for Autopilot Simulator." In Advances in Intelligent Systems and Computing, 265–74. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15796-2_27.

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Liu, Jialun. "Impacts of Rudder Configurations on Ship Maneuvering Performance." In Mathematical Modeling of Inland Vessel Maneuverability Considering Rudder Hydrodynamics, 201–20. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47475-1_8.

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Bassler, Christopher C., Ronald W. Miller, Arthur M. Reed, and Alan J. Brown. "Considerations for Bilge Keel Force Models in Potential Flow Simulations of Ship Maneuvering in Waves." In Contemporary Ideas on Ship Stability, 151–76. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00516-0_9.

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Bai, Yiming, Tieshan Li, and Xiaori Gao. "Ship Maneuvering Modeling Based on Fuzzy Rules Extraction and Optimization." In Advances in Neural Networks – ISNN 2013, 429–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39068-5_52.

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Tran, Ngoc-Huy, Nguyen Nhut-Thanh Pham, Bao Hong-Vo Thai, and Tat-Hien Le. "Study on Optimized Guidance and Robust Control for the Ship Maneuvering." In Lecture Notes in Electrical Engineering, 510–20. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69814-4_49.

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Li-Jia, Chen, and Huang Li-Wen. "Ship Collision Avoidance Path Planning by PSO Based on Maneuvering Equation." In Future Computing, Communication, Control and Management, 675–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27326-1_87.

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Makiyama, Humberto S., Edgar Szilagyi, Gabriel H. Pereira, Leanderson R. R. Alves, Brian M. Kodama, Denis Taniguchi, and Eduardo A. Tannuri. "Computational Graphics and Immersive Technologies Applied to a Ship Maneuvering Simulator." In Advances in Intelligent Systems and Computing, 626–35. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63403-2_56.

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Araki, Motoki, Hamid Sadat-Hosseini, Yugo Sanada, Naoya Umeda, and Frederick Stern. "Improved Maneuvering-Based Mathematical Model for Free-Running Ship Motions in Following Waves Using High-Fidelity CFD Results and System-Identification Technique." In Contemporary Ideas on Ship Stability, 91–115. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00516-0_6.

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Abásolo, María José, Cristian García Bauza, Marcos Lazo, Juan P. D’Amato, Marcelo Vénere, Armando De Giusti, Cristina Manresa-Yee, and Ramón Mas-Sansó. "From a Serious Training Simulator for Ship Maneuvering to an Entertainment Simulator." In Articulated Motion and Deformable Objects, 106–17. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08849-5_11.

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Karetnikov, Vladimir, Evgeniy Ol’Khovik, Artem Butsanets, and Aleksandra Ivanova. "Simulation of Maneuvering Trials of an Unmanned or Autonomous Surface Ship on a Navigation Simulator." In Lecture Notes in Civil Engineering, 146–56. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-33-6208-6_15.

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Тези доповідей конференцій з теми "Ship maneuvering"

Zhan, Dexin, Daniel Agar, Moqin He, Don Spencer, and David Molyneux. "Numerical Simulation of Ship Maneuvering in Pack Ice." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-21109.

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This paper presents preliminary results from a computer program for simulating ship maneuvering in ice covered waters. The program is derived from two programs, Ship Maneuvering Laboratory (SML) and a discrete element numerical modeling program (DECICE). SML is an in-house code developed by Oceanic Consulting Corporation for simulating ship maneuvering in open water. It is based on a ship maneuvering model originally developed by the Japanese mathematical maneuvering group (MMG). DECICE is a discrete element method which was developed by INTERA Technologies and is used to calculate the ice loads on the ship and the interactions between ice pieces. The paper presents a summary of the mathematical methods used together with the results of some case studies for ships EXM004, PSM004 and Esso Osaka Tanker. These computer predictions include turning circle and Zig-Zag maneuvers. Comparisons and discussion of the simulated results between cases with and without ice are also provided.

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Escario, Jose B., Juan F. Jimenez, and Jose M. Giron-Sierra. "Ship maneuvering planning using swarm intelligence." In OCEANS 2011 - SPAIN. IEEE, 2011. http://dx.doi.org/10.1109/oceans-spain.2011.6003449.

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Puodziunas, Jessica M., and John R. Somero. "Predicting Ship Maneuvering Through Machine Learning." In AIAA Scitech 2021 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2021. http://dx.doi.org/10.2514/6.2021-0475.

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Amendola, José, Eduardo A. Tannuri, Fabio G. Cozman, and Anna H. Reali. "Batch Reinforcement Learning of Feasible Trajectories in a Ship Maneuvering Simulator." In XV Encontro Nacional de Inteligência Artificial e Computacional. Sociedade Brasileira de Computação - SBC, 2018. http://dx.doi.org/10.5753/eniac.2018.4422.

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Ship control in port channels is a challenging problem that has resisted automated solutions. In this paper we focus on reinforcement learning of control signals so as to steer ships in their maneuvers. The learning process uses fitted Q iteration together with a Ship Maneuvering Simulator. Domain knowledge is used to develop a compact state-space model; we show how this model and the learning process lead to ship maneuvering under difficult conditions.

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Falzarano, Jeffrey M., and Chandan Lakhotia. "Effect of Icing on Ship Maneuvering Characteristics." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57920.

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In this paper the effect of icing forward on the maneuvering characteristics of a small offshore supply vessel hull form, which was used for acoustic surveys in the North Atlantic by the US Navy during the Cold War, is studied. Icing is well known to compromise the roll motion stability of vessels but its effect on maneuvering and specifically path stability is not as well known. Using available empirical formulas for maneuvering coefficients and steady turning ability the effect of icing on the path stability and steady turning ability of this vessel are approximately evaluated. The results show that icing does affect the maneuverability but more study is required to more precisely quantify this effect.

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Skejic, Renato, and Tor E. Berg. "Combined Seakeeping and Maneuvering Analysis of a Two-Ship Lightering Operations." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20616.

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Hydrodynamic interaction effects between two ships going ahead in regular deepwater waves were numerically studied during typical maneuvers for ship-to-ship (STS) operations, such as lightering, replenishment, etc. Such maneuvers are usually classified as potentially hazardous situations, due to the possibility of collision between the two vessels when they are operating in close proximity. Since the collision hazard is usually even greater in bad weather conditions, knowledge of the maneuvering capabilities of two ships in a seaway must be available in order to ensure safe and efficient STS operation. In this study, a combined seakeeping and maneuvering analysis of two ships involved in typical lightering operation was performed using a unified seakeeping and maneuvering theory developed by Skejic and Faltinsen [1, 2]. The unified theory integrates seakeeping and maneuvering analysis by using a two time scale assumption and modular concept. This approach allows the maneuvering behavior of the two ships involved in lightering operation in waves to be successfully described. The seakeeping analysis for both vessels uses Salvesen-Tuck-Faltinsen [3] (STF) strip theory for deep water by assuming that there are no hydrodynamic interaction in waves between the two ships. The regular wave field effects upon the involved vessels are described by the mean second-order wave loads. They can be estimated by using one of the available near/far field theories (Salvesen [4] and Faltinsen et al. [5]) that take the complete wave length range of interest for a considered STS maneuver into account. When the incident wave length is short relative to the ship length, the asymptotic theory by Faltinsen et al. [5] is used. The predicted mean second-order wave loads according to these theories are shown in the case of turning maneuver of a ‘MARINER’ type of a ship in specific wave conditions. The maneuvering module of the unified theory model is based on generalized slender-body theory, while calm-water interaction forces and moments between the two ships are estimated using Newman and Tuck [6] theory. Automatic steering- and speed-control algorithms for both ships (Skejic et al. [7]) are employed to achieve high-precision and collision-free lightering maneuvers in waves. This is illustrated by a numerical simulation involving ‘Aframax’ and ‘KVLCC’ (type 2 – Moeri tanker [16]) types of ships. Finally, from the perspective of marine safety and reliability, the future requirements and recommendations for typical lightering operations in a seaway are discussed.

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Skejic, Renato, and Odd M. Faltinsen. "Maneuvering Behavior of Ships in Irregular Waves." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10169.

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Ship maneuvering in waves is analyzed by using a unified seakeeping and maneuvering two-time scale model in irregular sea that has been applied by Skejic and Faltinsen [1] for regular waves. The irregular wave effects are accounted for by Newman’s [2] approximation of the slow-drift 2nd order wave loads valid for deep water (Faltinsen [3], Pinkster [29]). The modular type maneuvering model (MMG model) based on Söding’s [4] nonlinear slender-body theory is used for the maneuvering analysis. Forces and moments due to rudder, propeller, and viscous cross-flow are accounted for as presented by Skejic and Faltinsen [1] and Yasukawa [5, 6]. In particular, the behavior of the propulsive coefficients (the thrust deduction and wake fraction) in waves (Faltinsen et al. [7], Faltinsen and Minsaas [8]) are discussed from the perspective of ship maneuvering characteristics in both regular and irregular wave environments. The unified model of seakeeping and maneuvering for deep-water irregular waves is validated for the ‘S7-175’ (‘SR 108’) container ship in calm water and regular deep-water wave scenarios by comparison with experimental results by Yasukawa [5, 6]. The maneuvering model is applied to a ‘MARINER’ ship performing turning maneuver in irregular waves. The obtained results of the ships main maneuvering parameters are discussed from a statistical point of view.

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Guo, Bingjie, Eivind Ruth, Håvard Austefjord, Elzbieta M. Bitner-Gregersen, and Odin Gramstad. "Study on Ship Manoeuvering in Adverse Sea State." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61935.

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IMO introduced Energy Efficiency Design Index (EEDI) to regulate the greenhouse gas (GHG) emissions from ships. The cheapest and easiest way to fulfil the EEDI requirement is to reduce installed power for most ships. Therefore, it has raised serious concerns that some ship designers might choose to lower the installed power to achieve EEDI requirements and not consider ship safety in a satisfactory way. This could induce ship manoeuvrability and safety problems in adverse seas, which needs urgent investigations on minimum power to maintain ship manoeuvrability in adverse sea. A time domain code ‘Waqum’ has been developed based on the force superposition of unified theory to study the minimum required power for maintaining ship manoeuvring ability in adverse sea states. The code combines sea-keeping and maneuvering equations, together with an engine model to predict ship responses in waves. The code can help us to study ship responses in transit situation and give us better insight into ship maneuvering ability in adverse sea states. In order to improve the simulation speed, the time domain code does not calculate all the hydrodynamic forces directly. Thus, some precalculations should be done for some force components before launching the simulation for a new ship. Therefore, the methodology and accuracy of each force component will influence the accuracy of the manoeuvring code. The methodology for determining each force component will be discussed, especially the identification of maneuvering derivatives based on CFD simulations. The code has been improved recently, and another rudder model has been implemented. Further, the the code with new rudder model is verified in calm water. The code’s ability to capture ship maneuvering in waves is also demonstrated.

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Guo, Bingjie, Ruth Eivind, Håvard Austefjord, Elzbieta M. Bitner-Gregersen, and Olav Rognebakke. "Time Domain Analysis on Ship Maneuvering in Adverse Sea State." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54589.

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Energy Efficiency Design Index (EEDI) introduced by the IMO Resolution MEPC.203 (62) has been the first initiative to regulate the greenhouse gas (GHG) emissions from ships. However, it has raised serious concerns that some ship designers might choose to lower the installed power to achieve EEDI requirements not accounting satisfactorily for ship safety. This has encouraged investigations addressing the ability of ship to maintain maneuverability in adverse sea states. The Interim Guidelines proposed in 2013, in IMO Res. MEPC.232 (65), recommend minimum propulsion power to maintain ship maneuvering ability in adverse weather conditions for bulk carriers and tankers. These guidelines are mainly based on statistical analysis and equilibrium analysis in a steady state. Today, most of the available tools and methods handle ship responses in waves by separating it into seakeeping and maneuvering. The present study investigates ship maneuverability by use of a recently developed time domain code which combines the sea-keeping and maneuvering equation to predict ship responses in waves. In this way, better insight into ship responses in adverse conditions is obtained. The numerical results presented in the study are validated by model tests. The limitations of the time-domain code are discussed and future research needs are pointed out.

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Revestido, E., F. J. Velasco, I. Zamanillo, E. Lopez, and E. Moyano. "Parameter estimation of ship linear maneuvering models." In OCEANS 2011 - SPAIN. IEEE, 2011. http://dx.doi.org/10.1109/oceans-spain.2011.6003588.

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