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    Wyświetlanie 1-8 z 8
    Tytuł:
    Computational model for simulation of lifeboat motions during its launching from ship in rough seas
    Autorzy:
    Dymarski, P.
    Dymarski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/259137.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship in rough seas
    life saving appliances (LSA)
    lifeboat launching
    lifeboat motions
    lifeboat launching simulation
    Opis:
    This paper presents a computational model which describes motion of an object of six degrees of freedom (DoF), intended for simulation of spatial motion of one- or two- rope-sling lifeboat or rescue boat during its launching from ship in rough sea. This is a complex model which accounts for sea conditions as well as elasticity and damping properties of davit’s elements and mechanisms, rope and boat hull. Also, are presented results of example calculations for an assumed set of technical parameters of davit and boat as well as sea conditions.
    Źródło:
    Polish Maritime Research; 2012, 3; 45-52
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Searching for critical conditions during lifeboat launching – simulations
    Autorzy:
    Dymarski, C.
    Dymarski, P.
    Kniat, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260445.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    lifeboat launching
    numerical simulations
    kinematics
    Opis:
    The article describes numerical simulations of the process of lifeboat launching at the ship’s side. The research aimed at finding the values of ship motion parameters which appear to be most dangerous for people in the lowered lifeboat due to the generated accelerations. The simplified model of ship hull motion adopted at this research stage bases on a superposition of harmonic motions with given amplitudes and periods in six degrees of freedom. The range of the amplitude of motion for each degree of freedom corresponds approximately to that of possible motion of the PANAMAX type ship on the Baltic sea. In total, 120 960 cases of ship hull motion were examined.
    Źródło:
    Polish Maritime Research; 2017, S 1; 53-58
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computational simulation of motion of a rescue module during its launching from ship at rough sea
    Autorzy:
    Dymarski, C.
    Dymarski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/259483.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    lifeboat
    rescue boat launch
    innovation
    launch ramp aft
    computational model for simulation lifeboat
    computational model for simulation
    Opis:
    This paper is a continuation of the work titled : “A computational model for simulation of motion of rescue module during its launching from stern ramp of a ship at rough sea”. It presents results of computer simulations of motion of a rescue module with embarked persons during its launching on rollers along stern ramp of a ship at rough sea. The simulations were conducted for a selected ship fitted with a launching ramp , for a few selected scenarios of sea conditions. It was assumed that during this operation the ship drifts across direction of wave propagation.
    Źródło:
    Polish Maritime Research; 2014, 3; 54-60
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vertical motions damping model test of a lifeboat lowered onto a flat sea surface
    Autorzy:
    Kniat, A.
    Dymarski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/259924.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    damping
    dynamics
    differential equations
    lowering a lifeboat
    numerical simulations
    Opis:
    The article presents the experiment’s results of the lifeboat model lowered with an initial speed and then released to fall onto a flat water surface. The purpose of the research is to determine the trajectory of the vertical boat motion and describe it with a mathematical model. This is closely related to determining the damping factor since the vertical motion is damped and the lifeboat gets balanced and stops moving after some time. The procedure of selecting parameters in the mathematical model to adjust to the results of the experiment was described in details. The summary describes the imperfections of the presented damping model and their probable causes.
    Źródło:
    Polish Maritime Research; 2018, S 1; 51-55
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Visualization of a lifeboat motion during lowering along ship’s side
    Autorzy:
    Kniat, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260135.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    three-dimensional visualization
    kinematics
    computer animation
    lifeboat lowering
    numerical simulations
    Opis:
    This paper presents description of a computer program for motion visualization of a lifeboat lowered along ship’s side. The program is a post-processor which reads results of numerical calculations of simulated objects’ motions. The data is used to create scene composed of 3D surfaces to visualize mutual spatial positions of a lifeboat, ship’s side and water waving surface. Since the numerical data contain description of a simulation as a function of time it is possible to screen a static scene showing the simulated objects in an arbitrary instance of time. The program can also reproduce a sequence of scenes in the form of animation and control its speed. The static mode allows to view an arbitrary crosssection of the scene, rotate and enlarge specific details and make the image more realistic by hiding invisible lines or shading. The application of the program is aimed at making it possible to assess and analyze numerical calculation results in advance of their experimental verification.
    Źródło:
    Polish Maritime Research; 2017, 4; 42-46
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of motion of the lifeboat lowered from ships deck
    Autorzy:
    Dymarski, C.
    Kraskowski, M.
    Sperski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/259650.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship life-saving equipment
    lifeboat launching from ship in waves
    mathematical model
    Opis:
    A calculation model as well as differential equations of motion of the lifeboat lowered from the deck of the ship under rolling in rough seas, are presented. The equations were numerically integrated. The computer software elaborated on their basis makes it possible to trace instantaneous positions of the lowered lifeboat, calculate velocities and accelerations of its elements, as well as determine forces acting on the boat and persons accommodated in it.
    Źródło:
    Polish Maritime Research; 2006, 3; 26-32
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A numerical model to simulate the motion of a lifesaving module during its launching from the ship’s stern ramp
    Autorzy:
    Dymarski, P.
    Dymarski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/260530.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    lifeboat
    rescue boat launch
    innovation
    launch ramp aft
    computational model for simulation
    Opis:
    The article presents a numerical model of object motion in six degrees of freedom (DoF) which is intended to be used to simulate 3D motion of a lifesaving module during its launching from a ship using a stern ramp in rough sea. The model, of relatively high complexity, takes into account both the motion of the ship on water in changing sea conditions, and the relative motion of the ramp with respect to the ship. The motion of the ramp changes and strongly depends on its constructional and geometrical parameters. The presented model takes into account the displacement of the submerged part of the ramp, as well as its damping in the water and the interaction with the module moving on it. The results of test simulation of a module launching from the ship in still water are included.
    Źródło:
    Polish Maritime Research; 2014, 2; 34-40
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An integrated hydraulic drive system of a novel device for launching lifeboats from large passenger ships
    Autorzy:
    Dymarski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/259052.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship deck equipment
    ship evacuating systems
    life saving appliances systems
    lifeboat chain lift
    hydraulic drive and control system
    Opis:
    This paper presents a continuation of the projects [5, 6] dealing with the novel concepts of evacuating people from large passenger ships. A novel integrated drive and control system for chain lift with lifeboats fastened on it as well as for stern port- ramp, is presented. Additional novel elements is the application of the stern port - ramp fitted with a buoyancy element, and its increased capability of automatic adjusting its operational deflection in the case of a large forward trim of ship. It increases safety and comfort of evacuation in the difficult conditions, but to obtain it a more complex drive and control system has been required to be designed.
    Źródło:
    Polish Maritime Research; 2012, 1; 3-10
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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