Wyniki wyszukiwania dla: ships manoeuvering

• Numerical assessment of maneuvering properties of ship with a conventional type of propulsion

  Publikacja

  • R. KOŁODZIEJ

  - Rok 2019

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• Numerical Estimation of Hull Hydrodynamic Derivatives in Ship Maneuvering Prediction

  Publikacja

  • R. Kołodziej
  • P. Hoffmann

  - Polish Maritime Research - Rok 2021

  Prediction of the maneuvering characteristics of the ship at the design stage can be done by means of model tests, computational simulations or a combination of both. The model tests can be realized as direct simulation of the standard maneuvers with the free running model, which gives the most accurate results, but is also the least affordable as it requires very large tank or natural lake, as well as complex equipment of the...

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• NUMERICAL ESTIMATION OF HULL HYDRODYNAMIC DERIVATIVES IN SHIP MANOUVERING PREDICTION

  Publikacja

  • R. Kołodziej
  • P. Hoffmann

  - Rok 2021

  Operating in crowded waterways pose a risk of accidents and disasters due to maneuvering limitations of the ship. In order to predict ship’s maneuvering characteristics at the design stage, model tests are often executed as the most accurate prediction tool. Two approaches can be distinguished here: free running model tests and numerical simulations based on planar motion model with the use of hydrodynamic derivatives obtained...

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• Four Degree-of-Freedom Hydrodynamic Maneuvering Model of a Small Azipod-Actuated Ship With Application to Onboard Decision Support Systems

  Publikacja

  • M. Marley
  • R. Skjetne
  • M. Gil
  • P. Krata

  - IEEE Access - Rok 2023

  The main contribution of this paper is a numerical ship motion model of NTNU’s research vessel Gunnerus, capturing the surge, sway, roll, and yaw dynamics when sailing in uniform and steady currents. The model utilizes a crossflow drag formulation for the transverse viscous loads, and it includes a nonlinear formulation for the propulsion and steering loads provided by two azipod thrusters. A wide range of experimental data obtained...

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• Manoeuvring forces on azimuthing podded propulsor model

  Publikacja

  • M. Reichel

  - Polish Maritime Research - Rok 2007

  This paper presents the preliminary part of comprehensive manoeuvring open- water tests of a gas carrier model. The paper focuses on open water experiments with an azimuthing podded propulsor. The test program was carried out in the cavitation tunnel and the large towing tank of Ship Hydromechanics Division, Ship Design and Research Centre, Gdańsk. The pod was tested as a pushing unit with a 161.3 mm diameter propeller. Steering...

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• Prediction of manoeuvring abilities of 10000 DWT pod-driven coastal tanker

  Publikacja

  • M. Reichel

  - OCEAN ENGINEERING - Rok 2017

  This paper aims to present a new approach in the prediction of manoeuvring abilities of pod-driven ships. A new mathematical model of motions based on MMG methodology was developed and a new type of description of forces acting on azimuth drives is presented. Captive model tests of medium-size coastal tanker and pod open water tests were carried out in CTO S.A. (Ship Design and Research Centre S.A.) to obtain hull hydrodynamic derivatives...

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• Ships and Offshore Structures

  Czasopisma

  ISSN: 1744-5302 , eISSN: 1754-212X

• An electric ring thruster as auxiliary manoeuvring propulsion system for watercraft - construction analysis

  Publikacja

  • L. Matuszewski
  • K. Falkowski

  - Polish Maritime Research - Rok 2007

  The reported project aimed at examining properties and purposefulness of use of modern electromagneticbearings for a screw propeller in a prototype version of a synchronous ring motor with rare earths magnets.Bearings of this type generate electromagnetic forces which keep the rotor in a state of levitation. Therotating machine with magnetic bearings can work in any environment which reveals diamagnetic properties(air, vacuum,...

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• Assessment of safety of ships after the collision and during the ship salvage using the matrix type risk model and uncertainties

  Publikacja

  • M. K. Gerigk

  - Rok 2012

  W pracy omówiono metody oceny bezpieczeństwa statków w stanie uszkodzonym w warunkach operacyjnych. Przedstawiono proponowana metodę oceny bezpieczeństwa statku w stanie uszkodzonym opartą na ocenie zachowania się statku i ocenie ryzyka. Opisano całościowy, macierzowy model ryzyka wypadku. Podano informacje na temat zastosowania proponowanej metody do oceny bezpieczeństwa uszkodzonego statku w czasie katastrofy na morzu.

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• Propulsion and Maneuvering Systems’ Characteristics of the U.S. Flagged Great Lakes Self-Unloading Bulk Carriers

  Publikacja

  • M. Przybylski

  - Journal of Polish CIMEEAC - Rok 2018

  Paper contains an overview of the propulsion and maneuvering systems’ characteristics of United States flagged Great Lakes self - unloading bulk carriers. A contrast between the importance of the transport task carried by those vessels to their low number and considerable age suggests the need to review and understand their complexity as well as complexity of their operations in order to provide suitable energy- and operational...

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