Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 25

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Research on a control system based on stepping motor for ship's controllable pitch propellers

100%
Dymarski C.
Polish Maritime Research
|
2008
|
tom 15
|
nr 1
This paper presents description of a laboratory stand for testing servo-mechanisms of ship low-power CP propellers, as well as a remote control system for such propellers, based on electric stepping motor. Also, are presented results of the first series of tests of the controlsystem, carried out on non-loaded CP propeller by applying stepped values of propeller pitch at two values of rotational speed of the stepping motor
2

An intergrated hydraulic drive system of a novel device for launching lifeboats from large passenger ships

100%
Dymarski C.
Polish Maritime Research
|
2012
|
tom 19
|
nr 1
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
3

A concept of drive and control system of a novel device for people evacuating from large passenger ships

100%
Dymarski C.
Polish Maritime Research
|
2010
|
tom 17
|
nr 4
Year-after-year increasing number and size of sea-going passenger ships make it necessary to search for novel methods of evacuation of passengers from such large objects or to improve those which have been applied so far. This paper presents a concept of one of the original methods, in which, a.o., chain lifts have been applied to hold up life boats during voyage as well as to launch them in case of evacuation. Technical assumptions and requirements as well as schematic diagram of the hydraulic drive and control system of the lift, is presented
4

Umbilical cord winch for a remotely operated vehicle [ROV] system

100%
Dymarski C.
Polish Maritime Research
|
1999
|
tom 06
|
nr 1
5

Numerical investigations of the engine cooling system ina small power vessel pod propulsion system

63%
Dymarski C., Lesniewski W.
Polish Maritime Research
|
2008
|
tom 15
|
nr 4
The development of electronics and electrotechnology enabled to put electric motors of the alternating current in the pod and to use them for the main drive of ships. A lot of heat which must be picked up from the system is a problem which is turning up at applying the system of this type. Many big ships lately contended with these problems. Building the small propeller for the boat powered with solar power we decided to check the influence of the chilling middle on the temperature of the work of an engine. In the article we are presenting a built propeller and a way, into which an issue of the exchange of the heat was analysed using the Fluent software
6

A numerical model to simulate the motion of a lifesaving module during its launching from the ship's stern ramp

63%
Dymarski P., Dymarski C.
Polish Maritime Research
|
2014
|
tom 21
|
nr 2
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
7

A design concept of main propulsion system with hydrostatic transmission gear for inland waterways ship

63%
Dymarski C., Skorek G.
Polish Maritime Research
|
2006
|
nr Special Issue S2
This analysis is aimed at presentation of a design concept of ship’s main propulsion system and determination of its total efficiency. To realize the task it is necessary to have a look at description of energy losses and efficiency of hydrostatic transmission gear, with taking into account its possible simplification. Image of mutual interaction of losses generated in all elements of hydraulic system appears very complex. In this paper energy balance of main propulsion system with hydrostatic transmission gear intended for a segment ship for inland waterways and coastal service, was analyzed under assumption of necessary simplifications
8

Calculation of motion trajectory and geometric parameters of the trawl during pelagic fishing

63%
Dymarski C., Nakielski J.
Polish Maritime Research
|
2009
|
tom 16
|
nr 4
This paper presents a mathematical model of the mass centre motion trajectory of the trawl, its main geometrical parameters, way of solving the model as well as its example results. It could be useful to define optimum parameters of safe, effective and environmentally friendly pelagic fishing
9

Computational simulation of motion of a rescue module during its launching from ship at rough sea

63%
Dymarski C., Dymarski P.
Polish Maritime Research
|
2014
|
tom 21
|
nr 3
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
10

Anchoring and mooring equipment for a two-segment inland waterways ship

63%
Dymarski C., Nakielski J.
Polish Maritime Research
|
2006
|
nr Special Issue S2
This paper presents a review and analysis of anchoring and mooring equipment for contemporary inland waterways ships. Also, a design proposal of such equipment for a two-segment passenger ship as well as a list of selected components of the equipment and plan of their arrangement on the ship’s deck, is presented
11

Computational model for simulation of lifeboat motions during its launching from ship in rough seas

63%
Dymarski P., Dymarski C.
Polish Maritime Research
|
2012
|
tom 19
|
nr 3
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
12

A design proposal of driving system for roof segments and gantry crane of ecological floating dock

63%
Dymarski C., Lubinski P.
Polish Maritime Research
|
2005
|
nr Special Issue
In the conceptual design of an ecological floating dock, has been assumed to be applied a roof system consisted of six movable segments whose aim is to shelter dock’s working space from environmental influ-ence. The dock has to be also equipped with a gantry crane. Each of the devices is fitted with a tractionsystem whose drive is the subject of this paper. The driving system consisted of synchronous electric motors with external frequency control of their rotational speed, is proposed. Such system may ensure the same rotational speed at both supports, unambiguously determined by voltage frequency and independent of load. The solution could make it possible to avoid dangerous skewing displacements of the structures on rail tracks during service. Additionally, a simplified procedure of determining the main loads necessaryfor calculation and selection of the devices and traction systems is also presented
13

Comparative analysis of selected design variants of propulsion system for an inland waterways ship

63%
Dymarski C., Rolbiecki R.
Polish Maritime Research
|
2006
|
tom 13
|
nr 1
In this paper are presented design assumptions and technical conditions as well as selected design versions of propulsion system for an inland waterways ship, and also a preliminary comparative analysis of twosolutions. In the first version this is a combustion-electric system fitted with frequency converter and in theother – combustion-hydraulic one with hydrostatic reduction gear
14

Preliminary analysis of proposed ship docking systems for a designed floating dock

63%
Dymarski C., Popek A.
Polish Maritime Research
|
2005
|
nr Special Issue
In this paper are presented alternative design concepts and their comparative analysis of ship docking systems for a floating dock. The floating dock was designed by a team of Faculty of Ocean Engineeringand Ship Technology, Gdańsk University of Technology, within the frame of the ECOLOGICAL DOCK E!2968 project. The presented design solutions differ to each other mainly by the kinds of applied devices: in the first case these are mooring winches and docking cars,whereas in the other–rope warping winches.For both the specified systems a comparative analysis was carried out in which their features, complexity of construction and associated costs were among other accounted for. In the opinion of the authors the presented analysis may help the principal designer of the dock in making choice of a more suitable system
15

A concept of pusher - barge coupling device of two-segment ship for inland waterways and coastal service

63%
Dymarski C., Rolbiecki R.
Polish Maritime Research
|
2006
|
nr Special Issue S2
This paper presents design assumptions and a constructional concept of the device for coupling the pusher and hotel barge of two-segment inland waterways and coastal ship. The presented device makes it possible to reach either stiff connection or mutually controlled inclination of both segments against each other, which greatly improves the ship’s manoeuvrability and thus safety of navigation especially on narrow and meandering waterways
16

A design concept of fire protection system for an ecological floating dock

63%
Dymarski C., Sledz D.
Polish Maritime Research
|
2005
|
nr Special Issue
This paper presents possible fire risks to an ecological floating dock and a design concept of its fire prevention system. The design concept covers: the water main fire system, froth- smothering system for fire prevention of the main deck area and CO2 – fire extinguishing system for fire prevention of engine room,workshop and cable duct of the dock
17

Automatic control systems for ships fitted with podded propulsion drive (POD)

63%
Dymarski C., Dabrowski K.
Polish Maritime Research
|
2004
|
nr Special Issue
The paper shows purposefulness and possiblity of automation of ship propulsion systems, especially those of POD type, intended to be used on four Baltic navigation ships : a containership, ro-ro ship, product tanker, as well as river-sea-going ship, designed within the frame of the Eureka "Baltecologicalship"project. Requirements of ship classification societies, and general ones for modern ship control systems were presented, as well as a review and analysis of currently applied power plant automation systems fordiesel- electric ships fitted with podded propulsion drive (POD), were performed. Moreover real ways andpossibilities of controlling ship's course and speed were indicated. Information contained in this paper mayfacilitate selecting appropriate design assumptions for a propulsion control system to be applied on theabove mantioned ships
18

Laboratory test rig for examining aggregate mining from seabed using the Airlift method

63%
Dymarski C., Pajak T.
Polish Maritime Research
|
2018
|
tom 25
|
nr Special Issue S1
The use of the Airlift method for transporting the mined aggregate from the seabed to the deck of the mining ship is an alternative for presently used solutions, such as suction pumps or scoop transport for instance. Building the laboratory test rig was preceded by tests in natural conditions. The rig was designed in such a way as to model these conditions as close as possible, and to have potential for further development
19

Design concepts of propulsion and steering system for hotel unit of two-segment inland waterways ship

63%
Dymarski C., Rolbiecki R.
Polish Maritime Research
|
2006
|
nr Special Issue S2
This paper presents design assumptions and two conceptual design solutions of the propulsion and steering system for the hotel barge constituting a part of two-segment inland and coastal navigation ship. Both presented solutions are based on application of a small-power bow thruster with fixed propeller placed in a rotatable nozzle. In one of the solutions the propeller is driven by a hydraulic motor and in the other – by an electric motor. In both solutions the thruster’s column rotating is driven by a hydraulic cylinder
20

Design of structure of tension leg platform for 6 MW offshore wind turbine based on fem analysis

51%
Zywicki J., Dymarski P., Ciba E., Dymarski C.
Polish Maritime Research
|
2017
|
tom 24
|
nr Special Issue S1
The article presents the calculation and design stages of the TLP platform serving as a supporting construction of a 6 MW offshore wind turbine. This platform is designed to anchor at sea at a depth of 60 m. The authors presented the method of parameterization and optimization of the hull geometry. For the two selected geometry variants, the load and motion calculations of the platform subjected to wind, wave and current under 50-year storm conditions were performed. The maximum load on the structure was determined in these extreme storm conditions. For these loads, the MES calculation of the designed platform was performed for the selected variant. Authors have presented a method for calculating maximum wind, wave and current stresses on the structure during the worst storm in the past 50 years. For these loads the MES endurance calculations of the designed platform were made. Based on the results of these calculations, the required structural changes and recalculations have been made in succession to the structural design of the platform, which meets the design requirements and has the required ad hoc strength. The article contains stress analysis in „difficult” nodes of constructions and discusses ways of solving their problems. The work is part of the WIND-TU-PLA project from the NCBR Research Agreement (Agreement No. MARTECII / 1/2014)
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.