PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 34

Liczba wyników na stronie
first rewind previous Strona / 2 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  marine engineering
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 2 next fast forward last
1
Content available remote Investigations of the two-stage dust separator with a modernized axial cyclone
100%
Kirkiewicz J.
Polish Maritime Research
|
1998
|
tom nr 3
20-22
EN
Requirements for the contemporary ship dust separators and results of the investigations of three sucessively improved versions of axial cyclones used as the first stage of the dust separator with the sackcloth bag filter as the second stage are presented in the paper. Dedusting effectiveness and working noisiness of the cyclone dust separators as wellas hydraulic gradients and effectiveness of the two-stage dust separator were investigated.
2
Content available remote Labolatory investigations of the stern tube bearings and pitch control mechanism of the low-power CP propeller with screw-toothed gear
100%
Dymarski C.
Polish Maritime Research
|
1998
|
tom nr 3
15-19
EN
Superiority of the CP propellers over the fixed pitch propellers is evident in the case of their application on the ships intended to operate at very changeable loading conditions and on the ships required to have higher manoeuvrability or even dynamic positioning features. Demand for low-power CPPs of different pitch control mechanisms and systems were designed and manufactured by a team of the Faculty of Ocean Engineering and Ship Technology, Technical University of Gdańsk. A description and results of the labolatory tests of the stern tube bearing and seal assembly and of the pitch control mechanism with screw-toothed gear are presented in the paper.
3
Content available remote Endoscopic examination of naval gas turbines
100%
Korczewski Z.
Polish Maritime Research
|
1998
|
tom nr 4
13-16
EN
The paper application of endoscopy in diagnosing the naval gas turbines. Selected results of such examinations with the use of fiberocopes, carried out on the turbines installed on the Polish Navy vessels are included.
4
Content available remote Theoretical research on sliding radial seals applicable to ship CP propellers
100%
Dymarski C.
Polish Maritime Research
|
1998
|
tom nr 1
11-17
EN
Assumptions of a physical model, equations describing it, flow diagram of a relevant computer calculation program as well as results of the static calculations of the sliding radial seals usually applied in ship CP propeller systems are presented in the paper. The model takes into account the diathermic description of oil flow through the bearing interspace. The calculation results of an exemplary seal are compared with those obtained from a simpler, adiabatic oil flow model.
5
Content available remote Designing of mooring positioning system for an existing salvage ship
100%
Szelangiewicz T.
Polish Maritime Research
|
1998
|
tom nr 4
17-22
EN
In designing the mooring positioning system of the ship two basic requirements for limitation of the ship displacements and mooring wire strength are to be complied with. Apart from these conditions, additional technical service requirements are also imposed. It is quite easy to observe the additional requirements for the mooring positioning system to be fitted on a new ship. However, ensuring compliance with the requirements for the existing ship, especially especially small one, is a difficult task and therefore some optimizing calculations are then necessary. This paper describes design of the mooring positioning system for a small salvage ship. Working out of the project required the system to be adapted to the ship parameters.
6
Content available remote Investigations of naval gas turbine dynamics in different thermal states
100%
Korczewski Z.
Polish Maritime Research
|
1998
|
tom nr 2
10-15
EN
The paper presents selected results of the research on acceleration process of naval gas turbine in service. The investigations were carried out in view of preliminary evaluating the engine thermal state influence on its dymanic features. They present an important element of a diagnostic method under development. The method enables to diagnose the engine on the basis of testing of selected unsteady processes.
7
Content available remote Analysis of oily water two-phase flow between deflected parallel panels of the model oil separator
100%
Grudziński J. M.
Polish Maritime Research
|
1998
|
tom nr 2
16-19
EN
In the paper assumptions and course of labolatory tests of oil separation process (conxerning both heavy and light fuel oil) with the use of a model oil separator are presented. In the investigations NEPTUN 2.5 device, an existing oil separator was utilized. Model - prototype geometric symilarity and kinematic similarity of the oil separator were maintained. Measurement results of oil concentration at outlet are presented for different designs of calming elements of the form of parallel panels and for different physical parameters of flow. Conclusions and practical recommendations for the producer of the NEPTUN oil separator are included.
8
Content available remote Methodology of Selecting Strategies for Underwater Exploration Conducted for the Purposes of Litigation – Places and Conditions for the Exploration
51%
Olejnik A. , Szymański R.
Polish Hyperbaric Research
|
2015
|
tom 52
|
nr 3
29-31
EN
This is the first publication from a series of articles devoted to the issues of underwater exploration carried out for litigation purposes. The present paper suggests that an exploration strategy should be defined as: all actions that aim at creating and implementing a plan of exploration, conducted with the application of a defined exploration methodology - here understood to refer to the technical way the task is completed. Such an approach is taken in order to ensure the most adequate involvement of means and resources for the plan’s implementation. Since the choice of strategy affects many aspects that range from the technical to the environmental, this first part focuses on the location of the exploration and the anticipated conditions.
9
Content available remote Breathing Air Purification for Hyperbaric Purposes, Part II
51%
Woźniak A.
Polish Hyperbaric Research
|
2015
|
tom 50
|
nr 1
20-29
EN
Determining the efficiency of breathing air purification for hyperbaric purposes with the use of filtration systems is of a crucial importance. However, when the Polish Navy took samples of breathing air from their own filtration plant for quality purposes, these were found to not meet the required standard. The identification of this problem imposed the need to undertake actions aimed at the elimination of the identified disruptions in the process of breathing air production, with the objective of assuring its proper quality. This study presents the results of the initial tests on the air supply sources utilised by the Polish Navy, which were carried out for the purpose of setting a proper direction of future works and implementing corrective measures in order to optimise the breathing air production process. The obtained test results will be used in a subsequent publication devoted to the assessment of the level of efficiency of air purification with the use of a multifaceted approach consisting in the utilisation of various types of air supply sources and different configurations of purification systems.
10
Content available remote Integrated safety factors in design for infinite and finite fatigue lives of steel elements at multiaxial static and periodic loadings
51%
Kolenda J.
Polish Maritime Research
|
2000
|
tom Vol. 7, nr 1
10-13
EN
The paper deals with strength calculations of steel elements under combined stetic and periodic loadings. Two design criteria, (i) and (ii), are presented which ensure that not only the multiaxial stress does not exceed the ultimate (or yield) strength of the material but also that the combination of multiaxial mean stress and multiaxial periodic stress does not lead to fatigue failure in design (i) for an infinite fatigue life and (ii) for a finite fatigue life. It is assumed that the stress components are phisically independent of each other and that for each of them the corresponding q-N cure is given. The load modes and material anisotropy are taken into account.
11
Content available remote Energy-saving structures of hydrostatic drives for ship deck machines
51%
Paszota Z.
Polish Maritime Research
|
2000
|
tom Vol. 7, nr 1
3-9
EN
This paper presents a comparison of the energy behaviour of two widespread structures (of Load Sensing and Adaptive Secondary Control) of the central feeding systems of hydraulic motors in the case of supplying oil to one motor. The research was made possible due to elaboration of the computer simulation method of energy efficiency of hydrostatic transmissions. Both system solutions are shortly described together with presentation of equations of the total efficiency ... . Finally, results and analyses of computer simulations of efficiency of the systems are also described.
12
Content available remote The role of Computer Based Training for marine engineers
51%
Tomczak L.
Polish Maritime Research
|
2001
|
tom Vol. 8, nr 4
15-18
EN
This paper describes the latest developments in applications of Computer Based Training-interactive programs (CBT) for the familiarization with marine machinery, specially taking into account the safety aspects. The experience of Gdynia Maritime Academy in CBT applications, as well as benefits and advantages of the use of interactive programs in the educational process of marine officers are also presented. The paper includes an example of CBT interactive program concerning steering gear instsllation and controllable pitch propeller plant. Also, the basic tasks for CBT interactive programs in maritime education, based on the new methods and procedures for accident prevention, are described. In the two programs the newest graphic presentation techniques were applied. Finally it is concluded that the use of CBT interactive programs in maritime education results in increasing emergency preparedness and reduction of possible human errors in the operation and maintenance of marine equipment.
13
Content available remote Sztywność pali prefabrykowanych stosowanych w budownictwie hydrotechnicznym
51%
Gwizdała K. , Kowalski J. R.
Inżynieria Morska i Geotechnika
|
2006
|
tom nr 4
250-257
PL
Zalety prefabrykowanych pali żelbetowych i specyfika morskich budowli hydrotechnicznych. Metodyka wyznaczania sztywności pali. Wyniki próbnych obciążeń statycznych pali i wartości sztywności badanych pali o zmiennych długościach 10 do 20 m, w podłożu uwarstwionym.
EN
Advantages of pre-cast reinforced concrete piles and specifics of marine structures. Method for the determination of pile rigidity. The results of static load tests and the rigidities of 10 and 20 m long piles embedded in multilayered subsoil.
14
Content available Działalność Zakładu Technologii Prac Podwodnych Akademii Marynarki Wojennej w Gdyni. Cz. 2
51%
Szymański R. , Olejnik A.
Polish Hyperbaric Research
|
2014
|
tom nr 4(49)
31--38
PL
W artykule przedstawiono działalność Zakładu Technologii Prac Podwodnych Akademii Marynarki Wojennej w Gdyni. Jest to druga część materiału, w której zostanie przedstawiona działalność badawcza i dydaktyczna tej jednostki. W części pierwszej zaprezentowano krótki rys historyczny powstania Zakładu oraz podstawowe elementy infrastruktury badawczej tej jednostki naukowo-dydaktycznej. Zakład od ponad 30 - stu lat zajmuje się szerokim spektrum badań z zakresu technologii prac podwodnych i obecnie jest to jedyna tego typu jednostka badawcza w kraju, która tak kompleksowo rozwiązuje problematykę w tych obszarach.
EN
The article outlines the activity of the Department of Underwater Works Technology of the Polish Naval Academy of Gdynia. This is the second part of the material aimed at presenting research and educational activity of this organisational unit. The first part provided a brief historical background related to the foundation of the department, as well as the main elements of its research infrastructure. For over 30 years the department has been engaged in a broad spectrum research related to underwater works technologies and to date it is the only research unit of this type which offers complex solutions to the related issues.
15
Content available Czy nurka zastąpi robot podwodny? Mizerny postęp czy wielki sukces?
51%
Olejnik A. , Siermontowski P.
Polish Hyperbaric Research
|
2016
|
tom nr 1(54)
7--18
EN
The article deals with the subject matter related to the development of underwater works technologies. Nearly 15 years ago one of the authors of this study published a material in the monthly magazine of "Podwodny Świat" (The Underwater World) entitled "The Future of Underwater Technologies – the diver or the robot?" where he noted that the time of great changes in technologies aimed at researching the depths and conducting works under water has arrived. This new era mainly consists in the fact that on an increasing number of occasions the diver is replaced by an underwater robot. The presented material constitutes an attempt to provide an answer to the question whether the then posed thesis is still valid. In the article the authors discuss issues concerned with the development of techniques and technologies applied in the conquest of depths that leads them to the conclusion that the previously observed tendency of a double-tracked development of underwater technologies is gaining in strength, which causes that the works and exploration of bodies of water at great depths will be possible only with the use of unmanned techniques.
PL
Artykuł poświęcony jest problematyce rozwoju technologii prac podwodnych. Niemal 15 lat temu, jeden z autorów niniejszego opracowania opublikował materiał w miesięczniku „Podwodny Świat” pt. „Przyszłość technologii podwodnych – nurek czy robot?”, w którym wskazał, że nastał czas dużych zmian w technologiach służących badaniom głębin i pracy pod wodą. Polegające przede wszystkim na tym, że coraz częściej nurka zastępuje robot podwodny. Niniejszy materiał jest próbą odpowiedzi na pytanie, czy ówczesna prognoza jest nadal aktualna. W artykule, autorzy omawiają zagadnienia rozwoju technik i technologii służących podbojowi głębin, dochodząc do stwierdzenia, że zaobserwowana wcześniej tendencja dwutorowego rozwoju technologii podwodnych się wzmacnia, co powoduje, że praca i podbój głębin na dużych głębokościach będzie możliwa tylko z wykorzystaniem technik bezzałogowych.
16
Content available Tendencje rozwojowe bezzałogowej techniki morskiej
51%
Olejnik A.
Polish Hyperbaric Research
|
2016
|
tom nr 2(55)
7--28
PL
W niniejszym artykule dokonano próby zidentyfikowania aktualnych trendów rozwojowych bezzałogowych technologii morskich takich jak bezzałogowe pojazdy nawodne i podwodne. Analizy wykonano na podstawie dostępnych źródeł literaturowych, baz danych o projektach badawczych i źródeł internetowych. W materiale rozgraniczono badania terytorialnie ze względu na miejsce ich realizacji wyodrębniając obszar Unii Europejskiej, Stanów Zjednoczonych AP i Polski. W artykule na podstawie przeglądu celów i zakładanych efektów końcowych projektów wyodrębniono tendencje rozwojowe dla omawianej techniki morskiej. Ciekawym efektem przeglądu jest obserwacja, że polskie prace B+R z tego obszaru plasują się w głównych zidentyfikowanych tendencjach rozwojowych. Niestety ich efekty nie są porównywalne ze względu na znikomą wysokość krajowych funduszy na działalność B+R w porównaniu z innymi państwami.
EN
The article constitutes an attempt to identify current tendencies regarding the development of unmanned marine technologies such as unmanned surface and underwater vehicles. The analyses were performed on the basis of available literature, databases on research projects and internet sources. The material has been divided with regard to the location the research was conducted, the following groups being identified: the European Union, the United States of America and Poland. On the basis of the review of objectives and final effects of projects, tendencies in the development of the discussed marine technology have been identified. An interesting result of the review consists in an observation that Polish R&D works in this area are placed within the main identified developmental trends. Unfortunately, their effects are incomparable due to the minuteness of national funds allocated to R&D as opposed to other countries.
17
Reliability functions for elements of the system in failure state
51%
Hann M.
Polish Maritime Research
|
1999
|
tom 06
|
nr 4
18
Content available Wind tunnel experiment of multi-mode arc sail device
44%
Zhang H. , Hu Y. , He J.
Polish Maritime Research
|
2021
|
tom nr 4
20--29
EN
A ship’s wind energy utilization device with multi-mode arc-shaped sails is designed, which have different working modes for sail-assisting or wind power generation according to the ship’s navigation. The structural characteristics and working principles of this device are firstly described in this paper. Three sets of arc-shaped sails with different thickness (4.5 cm, 11.3 cm, 21.7 cm) were designed. Wind tunnel experiments were carried out in the respects of sail-assisting performance and wind-power generation to determine the best sail blade shape and to verify the energy-saving effect of this device. Experiments show that the sail with the smallest thickness (4.5 cm) has a better boosting effect than others, and the sail with the largest thickness (21.7 cm) has the best wind power generation performance. Considering the lateral force and the structural strength of the support, in the case of the comprehensive evaluation for the boosting and power generation performance, it is considered that the intermediate thickness (11.3 cm) is the best choice. The device has a good comprehensive energy utilization effect and has development and application value.
19
New developments in computer based training [CBT] interactive programs for marine engineering students and ship engineers
44%
Cwilewicz R. , Galecki W. , Tomczak L. , Zheng H.
Polish Maritime Research
|
1999
|
tom 06
|
nr 1
20
Content available Uzdatnianie powietrza oddechowego do celów hiperbarycznych. Cz. II
38%
Woźniak A.
Polish Hyperbaric Research
|
2015
|
tom nr 1(50)
31--44
EN
Determining the efficiency of breathing air purification for hyperbaric purposes with the use of filtration systems is of a crucial importance. However, when the Polish Navy took samples of breathing air from their own filtration plant for quality purposes, these were found to not meet the required standard. The identification of this problem imposed the need to undertake actions aimed at the elimination of the identified disruptions in the process of breathing air production, with the objective of assuring its proper quality. This study presents the results of the initial tests on the air supply sources utilised by the Polish Navy, which were carried out for the purpose of setting a proper direction of future works and implementing corrective measures in order to optimise the breathing air production process. The obtained test results will be used in a subsequent publication devoted to the assessment of the level of efficiency of air purification with the use of a multifaceted approach consisting in the utilisation of various types of air supply sources and different configurations of purification systems.
PL
Określenie skuteczności oczyszczania powietrza oddechowego przeznaczonego do stosowania w celach hiperbarycznych poprzez zastosowanie systemów filtracji jest bardzo istotne. Powstanie sytuacji problemowej polegającej na odrzuceniu próbek jakości powietrza oddechowego ze względu na brak spełnienia stawianych wymagań wymusiło konieczność podjęcia działań zmierzających do eliminacji zidentyfikowanych zakłóceń procesu produkcji powietrza oddechowego w celu zapewnienia odpowiedniej jego jakości. W niniejszym materiale przedstawiono wyniki badań wstępnych źródeł zasilania eksploatowanych w Marynarce Wojennej RP zrealizowanych w celu dokonania wyboru odpowiedniego kierunku prowadzenia dalszych prac i działań korygujących mających na celu optymalizację procesu produkcyjnego. Otrzymane wyniki badań będą wykorzystane w kolejnej publikacji poświęconej ocenie stopnia skuteczności oczyszczania powietrza przy zastosowaniu wielowariantowego podejścia polegającego na wykorzystaniu różnego rodzaju źródeł zasilania i konfiguracji układów uzdatniania.
first rewind previous Strona / 2 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.