Year 2018

• Guided waves for nondestructive diagnostics of embedded waveguides

  Publication

  • B. Zima

  - Year 2018

  The thesis concentrates on comprehensive theoretical, numerical and experimental analysis of guided wave propagation in bars embedded in concrete or mortar. The investigations are focused on a particular type of objects representing a laboratory model of a ground anchor. Complex description of wave propagation phenomena in partially embedded bars is given and its application in...

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• Hydro Lubricants: Water-based lubricants for hydropower applications

  Publication

  • W. Litwin
  • V. Balasubramaniam
  • E. von Hoersten
  • S. Martin
  • K. Marius

  - Year 2018

  Several different base oil types exist in the market including mineral and synthetic oils (e.g. polyalphaolefins, ester, polyglycol, etc.) and are currently widely in use. Although synthetic oils have drawn great attention over the past few decades in terms of their tribological benefits, mineral oils are still widely used in hydropower applications due primarily to their low cost and easy miscibility with other oils. However,...

• Hydroperoxyl radical and formic acid formation from common DNA stabilizers upon low energy electron attachment

  Publication

  • A. Ribar
  • S. Huber
  • M. Śmiałek-Telega
  • K. Tanzer
  • M. Neustetter
  • R. Schürmann
  • I. Bald
  • S. Denifl

  - PHYSICAL CHEMISTRY CHEMICAL PHYSICS - Year 2018

  2-Amino-2-(hydroxymethyl)-1,3-propanediol (TRIS) and ethylenediaminetetraacetic acid (EDTA) are key components of biological buffers and are frequently used as DNA stabilizers in irradiation studies. Such surface or liquid phase studies are done with the aim to understand the fundamental mechanisms of DNA radiation damage and to improve cancer radiotherapy. When ionizing radiation is used, abundant secondary electrons are formed...

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• INCREASING POWER SUPPLY SAFETY IN THE ASPECT OF SUPPORTING THE RENEWABLE ENERGY SOURCES BY CONVENTIONAL AND VIRTUAL POWER STORES

  Publication

  • D. Jakowski
  • M. Dzida

  - Polish Maritime Research - Year 2018

  This paper presents characteristics and purposefulness of supporting the renewable energy sources (OZE) by means of energy stores. The main emphasis was placed on analysis of virtual energy stores available for implementation in Polish economy conditions. A role which management of Demand Side Response (DSR) may play in balancing Polish electric power system, is discussed. Implementation of such solutions together with conventional...

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• INDICES FOR ASSESSING POTENTIAL ENVIRONMENTAL HAZARD FROM FUTURE SHIP SCRAPPING PROCESS, DETERMINABLE IN SHIP DESIGN STAGE

  Publication

  • R. Liberacki

  - Polish Maritime Research - Year 2018

  This paper shortly presents the issue of utilization of ships after their withdrawal from service. Information on number of floating units liquidated in previous years was presented. Hazards to the environment , health and life of workers employed in the Far East ship scrapping yards operating on the beaches, were indicated. Then, the most important rules which have to make the ship recycling process safe were referred to. This...

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• Influence of lubricating oil improvers on performance of crankshaft seals

  Publication

  • P. Bzura

  - Polish Maritime Research - Year 2018

  This paper presents an original method for checking influence of lubricating oil improvers on performance of crankshaft seals of combustion piston engine. Crankshaft seals were tested with the use of a modified friction node of T-02 four- ball apparatus in laboratory conditions. The tests were conducted according to a worked-out algorithm. Their results confirmed usefulness of the method for determining „harmful” performance...

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• Investigation method and mathematical model of pressure losses in hydraulic rotary motor

  Publication

  • A. Maczyszyn

  - Polish Maritime Research - Year 2018

  Tis paper presents a way of determining the coefcient k of the pressure losses Δp (fow drag) in internal ducts 8 Mp of SWSB-63 hydraulic motor. Te coefcient is determined at a fow rate equal to the theoretical capacity Q of the Pt pump feeding the motor , the losses are related to the nominal pressure p in the hydraulic system. Te investigations n followed a model of energy performance of hydraulic rotary motor, proposed by...

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• MARSTRUCT benchmark study on nonlinear FE simulation of an experiment of an indenter impact with a ship side-shell structure

  Publication

  • J. Ringsberg
  • J. Amdahl
  • B. Chen
  • S. Cho
  • S. Ehlers
  • Z. Hu
  • J. Kubiczek
  • M. Kõrgesaar
  • B. Liu
  • J. Marinatos... and 11 others

  - MARINE STRUCTURES - Year 2018

  This paper presents a benchmark study on collision simulations that was initiated by the MARSTRUCT Virtual Institute. The objective was to compare assumptions, finite element models, modelling techniques and experiences between established researchers within the field. Fifteen research groups world-wide participated in the study. An experiment involving a rigid indenter penetrating a ship-like side structure was used as the case...

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• METODA FILTROWANIA SYGNAŁU SZYBKOZMIENNEJ TEMPERATURY SPALIN WYLOTOWYCH SILNIKA O ZS

  Publication

  • P. Puzdrowska

  - Journal of Polish CIMEEAC - Year 2018

  W niniejszym artykule przedstawiono problematykę wpływu zakłóceń zewnętrznych pochodzących ze stanowiska badawczego na wyniki pomiarów szybkozmiennych temperatur spalin silników o zapłonie samoczynnym (ZS). Podkreślono, jak istotnym aspektem realizacji eksperymentów jest odpowiednie dostosowanie stanowiska badawczego tak, aby te wpływy były jak najmniejsze. Jednak w niniejszym opracowaniu skupiono się na metodach obróbki matematycznej...

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• Metoda wyznaczania stałej czasowej termopary na podstawie pomiaru szybkozmiennej temperatury spalin wylotowych silnika o ZS

  Publication

  • P. Puzdrowska

  - Scientific Journal of Gdynia Maritime University - Year 2018

  W niniejszym artykule przedstawiono problematykę wyznaczania stałej czasowej termopary. Wskazano na wagę właściwości dynamicznych termopar podczas eksperymentów. Przedstawiono stanowisko laboratoryjne, na którym przeprowadzono badania, mające na celu wyznaczenie stałych czasowych dwóch rodzajów termopar. Zaprezentowano trzy metody obliczania tego parametru. Określono wartość stałej czasowej, wyznaczonej metodą symulacji numerycznej...

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• METODY IDENTYFIKACJI STANÓW NIEZDATNOŚCI EKSPLOATACYJNEJ OKRĘTOWYCH WAŁÓW NAPĘDOWYCH – POMIARY WSPÓŁOSIOWOŚCI LINII WAŁÓW

  Publication

  • K. M. Marszałkowski (formerly: K. Marszałkowski)

  - Journal of Polish CIMEEAC - Year 2018

  W okrętownictwie, podobnie jak w innych dziedzinach związanych z budową i eksploatacją maszyn nadrzędnym czynnikiem stymulującym bezpośrednio rozwój diagnostyki technicznej jest chęć zredukowania do absolutnego minimum następujących zagrożeń: zagrożeń związanych z utratą zdrowia i życia ludzkiego, zagrożeń związanych z zanieczyszczeniem środowiska, zagrożeń związanych ze stratami ekonomicznymi. Szacuje się, że ponad 50% ogólnej...

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• Multi-objective weather routing of sailboats considering wave resistance

  Publication

  • M. Życzkowski
  • P. Krata
  • R. Szłapczyński

  - Polish Maritime Research - Year 2018

  The article presents a method to determine the route of a sailing vessel with the aid of deterministic algorithms. The method assumes that the area in which the route is to be determined is limited and the basic input data comprise the wind vector and the speed characteristic of the vessel. Compared to previous works of the authors, the present article additionally takes into account the effect of sea waves with the resultant resistance...

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• Nanotubular oxide layers and hydroxyapatite coatings on porous titanium alloy Ti13Nb13Zr

  Publication

  • M. Supernak (formerly: M. Supernak-Marczewska)
  • A. Ossowska
  • P. Strąkowska
  • A. Zieliński

  - Advances in Materials Science - Year 2018

  The surface condition of an implant has a significant impact on response occurring at the implant-biosystem border. The knowledge of physical-chemical and biological processes allows for targeted modification of biomaterials to induce a specified response of a tissue. The present research was aimed at development of technology composing of obtaining the nanotube oxide layers on a porous titanium alloy Ti13Nb13Zr, followed by the...

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• New Concept of Numerical Ship Motion Modelling for Total Ship Operability Analysis by Integrating Ship and Environment Under One Overall System

  Publication

  • H. Olszewski
  • M. H. Ghaemi

  - Polish Maritime Research - Year 2018

  The paper presents a new concept of overall ship motion modelling for application to total ship operability. The delivered model is a multi-phase and includes both submerged part of ship’s hull and the surrounding water as a unique body. The Discrete Finite Element Method is applied. The model is successfully examined and illustrated for a selected AHTS.

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• NON-LINE ANALYSIS OF STIFFNESS IN COMPRESSION CONDITIONS

  Publication

  • M. Kahsin
  • D. Stecki

  - Polish Maritime Research - Year 2018

  The analyzes were aimed at demonstrating the influence of parameters describing the deformation of the structure on the uncertainty of critical force, and the impact of technological imperfections on stress uncertainty in compression conditions. In a linear buckling analysis, the problem is considered only for the initial, permanent state of the stiffness matrix. In the case of demonstrating the influence of initial deformations...

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• Nowatorskie podejście do zarządzania jakością w branży morskiej na przykładzie stoczni Ostróda Yacht

  Publication

  • A. Dembicka
  • P. Szalewski
  • K. Mołas

  - Problemy Jakości - Year 2018

  Artykuł opisuje podejście procesowe funkcjonujące w jednej z największych polskich stoczni jachtowych Ostróda Yacht. Stocznia ta stanowi ilustrację – zakończonej z sukcesem – implementacji narzędzi Lean Production i stanowi przykład dla innych przedsiębiorstw w Polsce. Celem niniejszej publikacji jest ukazanie nowatorskiego podejścia do zarządzania jakością w stoczni jachtowej, które przyniosło korzyści zarówno z poziomu zarządzania...

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• Numerical assessment of ultimate strength of severe corroded stiffened plates

  Publication

  • K. Wołoszyk
  • M. Kahsin
  • Y. Garbatov

  - ENGINEERING STRUCTURES - Year 2018

  The objective of this work is to investigate numerically (using the non-linear FEM and the approach stipulated by the Common Structural Rules) the severe nonuniform corrosion degradation effect on the ultimate strength of stiffened plates and compare the results to the already published experimental works. Different factors governing structural behavior of corroded stiffened plates are investigated, such as corrosion degradation level,...

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• NUMERICAL MODEL OF PLASTIC DESTRUCTION OF THICK STEEL STRUCTURAL ELEMENTS

  Publication

  • J. Kowalski
  • J. Kozak

  - Polish Maritime Research - Year 2018

  In the shipbuilding industry, the risk of brittle fracture of the structure is limited by using certified materials with specified impact strength, determined by the Charpy method (for a given design temperature) and by supervising the welding processes (technology qualification, production supervision, non-destructive testing). For off-shore constructions, classical shipbuilding requirements may not be sufficient. Therefore, the...

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• Ocena przyczyn uszkodzeń i awarii konstrukcji kompozytowych zbiorników osadników wtórnych oczyszczalni ścieków w Iłży podczas rozruchu technologicznego

  Publication

  • J. Chróścielewski
  • K. Wilde
  • T. Mikulski
  • M. Miśkiewicz
  • K. Wąchalski

  - Year 2018

  Przedmiotem niniejszej opinii jest ocena przyczyn uszkodzeń i awarii konstrukcji kompozytowych zbiorników osadników wtórnych oczyszczalni ścieków w miejscowości Iłża obejmująca rozwiązania projektowe, wykonawcze i rozruch technologiczny. Opinia ma na celu określenie przyczyn awarii zbiorników kompozytowych uwzględniając założenia i rozwiązania projektowe oraz proces ich obciążenia przy rozruchu technologicznym. Zakres opinii odnosi...

• Opracowanie opinii technicznej w zakresie występowania iniektu wewnątrz wskazanych przez Zleceniodawcę kanałów kablowych mostu MA-09 w ciągu drogi S7

  Publication

  • M. Miśkiewicz
  • M. Rucka
  • K. Wilde
  • J. Chróścielewski
  • Ł. Pyrzowski
  • B. Zima
  • B. Meronk
  • R. Kędra

  - Year 2018

  Celem opracowania jest ocena występowania iniektu wewnątrz wskazanych przez Zleceniodawcę kanałów kablowych mostu MA-09 realizowanego w ramach zadania „Budowa drogi S-7 Gdańsk (A-1) – Elbląg (S-22) odc. Koszwały (DK nr 7, W. Koszwały) - Elbląg (z węzłem Kazimierzowo) z podziałem na 2 części. Zadanie 1: Koszwały – Nowy Dwór Gdański“. Zakres opracowania obejmuje: • zapoznanie się z dokumentacją techniczną obiektu, • wizję lokalną, •...

• Pełnienie nadzoru naukowego nad naprawą po awarii i dalszą budową konstrukcji mostu M-78. Ekspertyza techniczna

  Publication

  • J. Chróścielewski
  • M. Miśkiewicz
  • Ł. Pyrzowski
  • B. Sobczyk
  • B. Zima
  • K. Wilde

  - Year 2018

  Celem opracowania jest szczegółowa analiza mostu M-78 wykonywanego w ramach zadania „Projekt i budowa drogi ekspresowej S-6 na odcinku od węzła „Kołobrzeg Zachód" /bez węzła/ węzeł „Ustronie Morskie" /z węzłem/ oraz „Budowa obwodnicy m. Kołobrzeg w ciągu drogi krajowej nr 11” ”. Opracowanie w sposób szczegółowy przedstawia prace zrealizowane na potrzeby wydanych opinii technicznych w trakcie realizacji mostu. Zakres opracowania...

• Pneumatyczne tratwy ratunkowe w świetle przepisów Międzynarodowego Kodeksu Środków Ratunkowych LSA

  Publication

  • I. Szwoch
  • E. Książkiewicz

  - Autobusy. Technika, Eksploatacja, Systemy Transportowe - Year 2018

  W artykule omówione zostały międzynarodowe standardy dotyczące projektowania i eksploatacji pneumatycznych tratw ratunkowych. Tratwy ratunkowe stanowią podstawowy środek zmniejszający skutki uszkodzenia lub utraty statku w przypadku nagłych katastrof i masowej ewakuacji. Ich bezpieczeństwo i niezawodność wpływa na bezpieczeństwo transportu morskiego zapewniając możliwość przetrwania rozbitków po opuszczeniu uszkodzonego statku....

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• Profesorowie Politechniki Gdańskiej w procesie projektowania, budowy i eksploatacji „Sołdka”

  Publication

  • M. Dzida

  - Year 2018

  Przedstawiono sylwetki profesorów Politechniki Gdańskiej uczestniczących w czasie projektowanie, budowy i eksploatacji pierwszego statku handlowego "Sołdek" wybudowanego w 1948 r. w Stoczni Gdańskiej

• PROJEKTOWANIE STANOWISK LABORATORYJNYCH WSPIERAJĄCYCH PROCES SZKOLENIA PRAKTYCZNEGO KADR MORSKICH DZIAŁU MASZYNOWEGO W ŻEGLUDZE MIĘDZYNARODOWEJ, PRZYBRZEŻNEJ I KRAJOWEJ

  Publication

  • Z. Korczewski
  • K. M. Marszałkowski (formerly: K. Marszałkowski)
  • N. Ochał
  • J. Rudnicki

  - General and Professional Education - Year 2018

  Within the article a design offer of the Department of Ship and Power Plants of the Faculty of Ocean Engineering And Ship Technology at the Gdansk University of Technology has been presented. The offer concerns designing laboratory stations which might stand for the equipment of a didactic base of maritime educational centers i.e. maritime (naval) academies and schools as well as maritime affairs' professional training centers,...

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• PRZYKŁAD MODELU GRY FABULARNEJ WSPIERAJĄCY PROCES ZAANGAŻOWANIA I MOTYWACJI STUDENTÓW WYŻSZYCH UCZELNI TECHNICZNYCH

  Publication

  • T. Niksa-Rynkiewicz

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2018

  Artykuł prezentuje koncepcję budowy uniwersalnego scenariusza gry fabularnej, która pomaga zbudować zaangażowanie wśród studentów uczelni technicznych. Jednym ze sposobów na wzmożenie motywacji w procesie uczenia się jest gamifikacja. Gdy gamifikacja wspiera proces nauczania często tworzone są modele tematycznie związane z problematyką danego przedmiotu. Scenariusz proponowanej gry jest uniwersalny i można go wykorzystać w ramach...

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• REDUNDANCY AS A WAY INCREASING RELIABILITY OF SHIP POWER PLANTS

  Publication

  • W. Tarełko

  - New Trends in Production Engineering - Year 2018

  One of key ways of assuring a high level of reliability of a ship power plant is to design redundancy of its structural elements, for example redundancy of prime drivers, drivelines etc. This paper deals with issues related to the redundancy as a way increasing dependability of the ship power and propulsion systems. Especially, fundamental characteristics of dependability, major design strategies influencing the reliability, and...

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• REWIZJA PRZYBLIŻONYCH METOD OBLICZANIA OPORU CAŁKOWITEGO KADŁUBA W OPARCIU O BADANIA MODELOWE WYBRANEGO JACHTU ŻAGLOWEGO

  Publication

  • A. Karczewski
  • H. Pruszko
  • A. Malinowska

  - Prace Wydziału Nawigacyjnego Akademii Morskiej w Gdyni - Year 2018

  Rewizja opiera się na weryfikacji wybranych przybliżonych metod prognozowania oporu całkowitego gołego kadłuba opracowanych w wyniki badań systematycznej serii kadłubów jachtów żaglowych w latach od 1973 do 2010 znanych, jako The Delft Systematic Yacht Hull Series (DSYHS). Zademonstrowano wyniki otrzymane w oparciu o wzory przybliżone (Metoda Delft), obliczenia numeryczne (CFD) i badania modelowe dla wybranego jachtu żaglowego...

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• Rozkład naprężeń mechanicznych w łyżce o szerokości 500 mm, przeznaczonej do koparki podsiębiernej

  Publication

  • J. Kowalski
  • A. Lesnau

  - Scientific Journal of Gdynia Maritime University - Year 2018

  W artykule zaprezentowano optymalizację kształtu łyżki koparki przed­siębiernej z wykorzystaniem analizy wytrzymałościowej. Analizę oparto na trójwymiarowym modelu konstrukcji łyżki z zastosowaniem metody elementów skończonych (MES). Opracowanie wspomnianej metody pozwoliło na modyfikację konstrukcji łyżki, która dała w efekcie obniżenie naprężeń złożonych w newralgicznych obszarach konstrukcji łyżki. Przedstawiona analiza okazała...

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• SELECTED COMBINED POWER SYSTEMS CONSISTED OF SELFIGNITION ENGINE AND STEAM TURBINE

  Publication

  • W. Olszewski
  • M. Dzida

  - Polish Maritime Research - Year 2018

  This paper presents optimization of selected combined diesel engine-steam turbine systems. Two systems: the system combined with waste heat one-pressure boiler only and its version containing additionally low-pressure boiler proper feeding degasifier and the system of two-pressure cycle, were taken into considerations. Their surplus values of power output and efficiency associated with utilization of waste heat contained in piston...

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• Selected problems of sensitivity and reliability of a jack-up platform

  Publication

  • B. Rozmarynowski
  • T. Mikulski

  - Polish Maritime Research - Year 2018

  The paper deals with sensitivity and reliability applications to numerical studies of an off-shore platform model. Structural parameters and sea conditions are referred to the Baltic jack-up drilling platform. The study aims at the influence of particular basic variables on static and dynamic response as well as the probability of failure due to water waves and wind loads. The paper presents the sensitivity approach to a generalized...

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• Selection of main engines for hopper suction dredgers with the use oobability models

  Publication

  • D. Bocheński

  - Polish Maritime Research - Year 2018

  This paper presents a new original method of selection of main engines for hopper suction dredgers with regard to probabilistic models. It was proposed to use the normal distribution to describe the operational loads of the main receivers. The principles for determination of parameters of load distribution and design power of the main engines were formulated. Lastly, the principles of selection of the size and number of main engines...

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• Sensitivity analysis in design process of sandwich U-shaped composite footbridge

  Publication

  • T. Ferenc
  • Ł. Pyrzowski
  • J. Chróścielewski
  • T. Mikulski

  - Year 2018

  The structure of the sandwich composite footbridge of a 14 metre span length and U-shaped cross-section was analysed. Sensitivity analysis was performed to support the design process of this innovative object. Linear discrete sensitivity analysis was performed by means of finite element method. The influence of vari-ation of several design variables i.e. thicknesses of inner and outer laminates on the mid-span deflection, as-sumed...

• Ship domain applied to determining distances for collision avoidance manoeuvres in give-way situations

  Publication

  • R. Szłapczyński
  • P. Krata
  • J. Szłapczyńska

  - OCEAN ENGINEERING - Year 2018

  Ship domain is often used in marine navigation and marine traffic engineering as a safety condition. The basic idea behind those applications is that an encounter of two or more ships can be considered safe if neither of ship domains is intruded by other ships. Research utilising this approach has been documented in numerous works, including publications on optimising collision avoidance manoeuvres performed to fulfil domain-based...

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• Ship weather routing optimization with dynamic constraints based on reliable synchronous roll prediction

  Publication

  • P. Krata
  • J. Szłapczyńska

  - OCEAN ENGINEERING - Year 2018

  Ship routing process taking into account weather conditions is a constrained multi-objective optimization problem and it should consider various optimization criteria and constraints. Formulation of a stability-related, dynamic route optimization constraint is presented in this paper. One of the key objectives of a cross ocean sailing is finding a compromise between ship safety and economics of operation. This compromise should...

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• Signal filtering method of the fast-varying diesel exhaust gas temperature

  Publication

  • P. Puzdrowska

  - Combustion Engines - Year 2018

  The paper presents the problem of the impact of external distortions originating on laboratory test stands on the results of measurements of fast-varying diesel exhaust gas temperature. It has been stressed how significant the aspect of the test stand adaptation is during an experiment to ensure the smallest possible impact. This paper, however, focuses on the methods of mathematical processing of a signal recorded during experimental...

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• Simple Computational Methods in Predicting Limit Load of High-Strength Cold-Formed Sections due to Local Buckling: A Case Study

  Publication

  • P. Bielski (formerly: P. M. Bielski)
  • L. Samson
  • O. Wysocki
  • J. Czyżewicz

  - Polish Maritime Research - Year 2018

  Cold-formed thin-walled sections are prone to local buckling caused by residual stresses, geometrical imperfections and inconsistency of material properties. We present a real case of buckling failure and conduct a numerical and experimental study aimed to identify methods capable of predicting such failures. It is important because designers of structures are getting more FEA-oriented and tend to avoid lengthy procedures of cold-formed...

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• Simulation of Life Raft Motions on Irregular Wave - An Analysis of Situations Leading to Raft Capsizing

  Publication

  • O. Kazimierska

  - Polish Maritime Research - Year 2018

  Successful rescue action at sea is based on a. o. a correct choice of rescue means and their reliability. Operational characteristics of life-saving appliances determine their performance in a given water area. Therefore they affect duration time of rescue action and decide this way on survival time of shipwrecked persons. This paper presents impact of characteristics of circular inflatable life rafts on their dynamics in a...

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• Stalowe panele sandwicz w konstrukcjach okrętowych

  Publication

  • J. Kozak

  - Year 2018

  Dążenie do tego, aby nowe konstrukcje pojazdów takich jak statki czy pociągi były coraz szybsze, lżejsze i większe wywołuje konieczność poszukiwania innowacyjnych rozwiązań strukturalnych. Ujmując rzecz ogólnie, w celu realizacji tego postulatu, można iść w jednym z dwóch kierunków: poszukiwać nowych rozwiązań konstrukcyjnych czy też technologicznych, albo stosować nowe materiały. Oba podejścia są zazwyczaj wzajemnie ze sobą powiązane:...

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• STANOWISKO DO BADANIA WTRYSKIWACZY W WARUNKACH ZASILANIA SILNIKA PALIWAMI MODYFIKOWANYMI

  Publication

  • J. Rudnicki
  • N. Ochał

  - Journal of Polish CIMEEAC - Year 2018

  Od 2015 roku w Katedrze Siłowni Morskich i Lądowych Wydziału Oceanotechniki i Okrętownictwa Politechniki Gdańskiej realizowane są badania naukowe związane z kompleksowym badaniem silnika o zapłonie samoczynnym zasilanego różnymi rodzajami pozostałościowych paliw żeglugowym, w tym zasiarczonych i modyfikowanych. Przewidywanym efektem tych badań, dofinansowanych przez Wojewódzki Fundusz Ochrony Środowiska i Gospodarki Morskiej w...

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• Structural and mechanical properties of hydroxyapatite coatings formed by ion-beam assisted deposition

  Publication

  • A. Zykova
  • V. Safanov
  • S. Dudin
  • S. Yakovin
  • N. Donkov
  • M. H. Ghaemi
  • M. Szkodo
  • M. Antoszkiewicz
  • M. Szyfelbain
  • A. Czaban

  - Journal of Physics : Conference Series - Year 2018

  The ion-beam assisted deposition (IBAD) is an advanced method capable of producing crystalline coatings at low temperatures. We determined the characteristics of hydroxyapatite Ca10(PO4)6(OH)2 target and coatings formed by IBAD using X-ray photoemission spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy dispersive X-ray (EDX). The composition of the coatings'...

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• Surface sliding in human abdominal wall numerical models: Comparison of single-surface and multi-surface composites

  Publication

  • P. Bielski (formerly: P. M. Bielski)
  • I. Lubowiecka

  - Year 2018

  Determining mechanical properties of abdominal soft tissues requires a coupled experimental-numerical study, but first an appropriate numerical model needs to be built. Precise modeling of human abdominal wall mechanics is difficult because of its complicated multi-layer composition and large variation between specimens. There are several approaches concerning simplification of numerical models, but it is unclear how far one could...

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• System-theoretic approach to safety of remotely-controlled merchant vessel

  Publication

  • K. Wróbel
  • J. Montewka
  • P. Kujala

  - Ocean Engineering - Year 2018

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• THE EFFECT OF NOTCH DEPTH ON CTOD VALUES IN FRACTURE TESTS OF STRUCTURAL STEEL ELEMENTS

  Publication

  • J. Kowalski
  • J. Kozak

  - Polish Maritime Research - Year 2018

  In elements of steel structures working at low temperatures, there is a risk of appearance of brittle fracture. This risk is reduced through the use of certified materials having guaranteed strength at a given temperature. A method which is most frequently used to determine brittle fracture toughness is the Charpy impact test, preformed for a given temperature. For offshore structures intended to work in the arctic climat e, the...

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• The effect of numerical 2D and 3D FEM element modelling on strain and stress distributions at laser weld notches in steel sandwich type panels

  Publication

  • K. Niklas
  • J. Kozak

  - Polish Maritime Research - Year 2018

  Like other means of transport, merchant ships face the problem of increasing requirements concerning the environment protection, which, among other issues, implies the reduction of fuel consumption by the ship. Here, the conventional approach which consists in making use of higher strength steels to decrease the mass of the ship hull can be complemented by the use of new steel structures of sandwich panel type. However, the lack...

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• The Effect of Oxygenated Diesel-N-Butanol Fuel Blends on Combustion, Performance, and Exhaust Emissions of a Turbocharged CRDI Diesel Engine

  Publication

  • G. Labeckas
  • S. Slavinskas
  • J. Rudnicki
  • R. Zadrąg

  - Polish Maritime Research - Year 2018

  The article deals with the effects made by using various n-butanol-diesel fuel blends on the combustion history, engine performance and exhaust emissions of a turbocharged four-stroke, four-cylinder, CRDI 1154HP (85 kW) diesel engine. At first, load characteristics were taken when running an engine with normal diesel fuel (DF) to have ‘baseline’ parameters at the two ranges of speed of 1800 and 2500 rpm. Four a fossil diesel (class...

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• The Emission and Combustion Characteristics of Marine Diesel Engine with Extreme Throttled of Air or Exhaust Ducts

  Publication

  • J. Kowalski

  - New Trends in Production Engineering - Year 2018

  Presented paper shows the results of the laboratory tests on the relationship between the extreme throttling of both air intake duct and exhaust gas duct and gaseous emission from the marine engine. The object of research is a laboratory, 4-stroke, DI diesel engine, operated at loads from 50 kW to 250 kW at a constant speed equal to 750 rpm. During the laboratory tests the thermodynamic and exhaust gas emission characteristics...

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• The influence of the fuel spray nozzle geometry on the exhaust gas composition from the marine 4-stroke diesel engine

  Publication

  • J. Kowalski

  - Combustion Engines - Year 2018

  The paper presents experimental research on a 4-stroke, 3-cylinder, turbocharged AL25/30 Diesel engine. Research consisted in investigating the effect of the geometry of the fuel injectors on the exhaust gas composition from the engine. During measurements, the engine was operated with a regulator characteristic of a load range from 40 kW to 280 kW, made by electric water resistance. The engine was mechanically coupled to the electric...

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• THE METHOD OF ENERGY-EFFICIENCY INVESTIGATIONS OF THE NEWLY PRODUCED MARINE FUELS THROUGH AN APPLICATION OF THE LABORATORY DIESEL ENGINE

  Publication

  • Z. Korczewski

  - New Trends in Production Engineering - Year 2018

  The article deals with one of the scientific issue solved within frames of the research project financed by Voivodeship Fund for Environmental Protection and Water Management in Gdansk, namely, in particular, the method of energy investigations of the self-ignition engine in conditions of its supply with a non-standard (modified) marine fuel. The representative results of engine tests worked out on the especially built laboratory...

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• Towards a decision support system for maritime navigation on heavily trafficked basins

  Publication

  • B. Ożoga
  • J. Montewka

  - Ocean Engineering - Year 2018

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• Towards a Method Evaluating Control Actions in STPA-Based Model of Ship-Ship Collision Avoidance Process

  Publication

  • K. Wróbel
  • M. Gil
  • J. Montewka

  - Year 2018

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