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    Wyświetlanie 1-4 z 4
    Tytuł:
    Devices improving the manoeuvrability characteristics of ships. Part I. Laboratory tests on models in cavitation tunnel and towing tank
    Autorzy:
    Doerffer, J. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/963461.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    opening balbous bow
    opening rudder
    stern shield
    steering braking device
    braking the ship
    Opis:
    An account of research activities on the devices improving the manoeuvring abilities carried out at the Gdansk University of Technology is reviewed. These devices could be placed on the bulbous bow (opening bulbous bow) and at the stern end (wake pressure equalising device, stern shield, opening rudder). Researches with segments of models of these devices in a cavitation tunnel and on self propelled models of ships in a towing tank were performed as well as on open lakes.
    Źródło:
    Polish Maritime Research; 2007, S 1; 81-87
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Agent-based evacuation in passenger ships using a goal-driven decision-making model
    Autorzy:
    Ni, B.
    Li, Z.
    Li, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/258666.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship evacuation analysis
    agent-based model
    goal-driven decision-making model
    social force model
    steering behavior
    Opis:
    A new agent-based model is proposed to support designers in assessing the evacuation capabilities of passenger ships and in improving ship safety. It comprises models for goal-driven decision-making, path planning, and movement. The goal-driven decision-making model determines an agent’s target by decomposing abstract goals into subgoals. The path-planning model plans the shortest path from the agent’s current position to its target. The movement model is a combination of social-force and steering models to control the agent in moving along its path. The utility of the proposed model is verified using 11 tests for passenger ships proposed by the Maritime Safety Committee of the International Maritime Organization.
    Źródło:
    Polish Maritime Research; 2017, 2; 56-67
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Devices improving the manoeuvrability characteristics of ships. Part II. ”Doerffer’s Rudder” – experience learnt from tests carried out on real ships
    Autorzy:
    Doerffer, J. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/963470.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    results of tests with Doerffer's Rudder
    opening rudder
    opening balbous bow
    stern shield
    steering braking device
    braking the ship
    Opis:
    An account of research activities on the devices improving the manoeuvring abilities carried out at the Gdansk University of Technology were presented in Part I of the paper. Experience from implementation of open rudders on real ships is presented in Part II. Open rudders were fitted on two full size ships: a 1000 BHP harbour tug and a 2500 BHP long line fishing vessel. Designs were made for four types of ships: motor sailing passenger ship “Gwarek” (2 x 1.032 BHP and 1800 m˛ sail area); arctic expedition sailing ship m/y “Polarex” (length 40,4 m, 1200 BHP); rescue vessel R-27 (two engines a 600 BHP with single propeller); harbour tug m/t “Atlas” (2500 BHP). None of these designs was implemented due to financial difficulties of the owners. Further model experiments with a self propelled model of a cargo liner m/s “Hollandia” exceeding 20 knots were carried out on the lake as well as with a model of a twin screw vessel.
    Źródło:
    Polish Maritime Research; 2007, S 1; 88-92
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of probabilities defining safety of a sea-going ship during performance of a transportation task in stormy weather conditions
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2073602.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    reliability
    semi-Markov process
    diesel engine
    propeller
    sea-going ship
    steering gear
    niezawodność
    silnik wysokoprężny
    śmigło
    statek morski
    proces semi-Markowa
    Opis:
    The paper presents the possibility of applying the theory of semi-Markov processes to determine the limiting distribution for the process of changes of technical states being reliability states of the systems of sea-going ships significantly affecting safety of such ships, which include main engine, propeller and steering gear. The distribution concerns the probabilities of occurrence of the said states defined for a long time of ship operation (t → ∞). The considered states are as follows: s0 – full ability state of the systems, i.e.: main engine, propeller and steering gear, s1 – inability state of the main engine, s2 – inability state of the propeller, s3 – inability state of the steering gear. Significance of the systems for safety of the ships at sea was demonstrated herein. General conditions for performing transportation tasks by the ships, with particular regard to stormy conditions, were also here described.
    Źródło:
    Journal of Polish CIMEEAC; 2017, 12, 1; 21--30
    1231-3998
    Pojawia się w:
    Journal of Polish CIMEEAC
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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