Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Niezgoda, T." wg kryterium: Autor


Tytuł:
Methods of CO2 acquisition and costs reduction in shale rocks fracturing technology
Autorzy:
Miedzińska, D.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/299042.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fracturing
shale gas
carbon dioxide
economics
Opis:
The innovative method of shale gas recovery with the use of subcritical CO2 is currently developed within the project titled “Development of guidelines for design of innovative technology of shale gas recovery with the use of liquid CO2 on the base of numerical and experimental research – DIOX4SHELL ”, supported by the National Centre for Research and Development (NCBR). The project is carried out by Polish company PGNiG and by academics from WAT, AGH and PW (Military University of Technology, AGH University of Science and Technology, and Warsaw University of Technology). Finding the best business model, in which costs of CO2 production or acquisition are negligible is one of the most important factors influencing the economical effectiveness of the technology. The main part of known CO2 acquisition methods is based on fuel purchase and its combustion, what is very expensive process. It results with the high CO2 price, when purchasing from producer, about 300 zl/ton. This price is quite high, considering current low prices of natural gas. In the paper basic aspects of CO2 acquisition from CO2 producers, exhaust gases treatment plants or plasma gasification methods will be presented.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 1; 11-22
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Doświadczalne badanie wpływu geometrii wypełnienia w aspekcie energii zniszczenia tulejek kompozytowych
The experimental investigation of influence of kind geometry of fullfilment basic composite structures on energy the destruction
Autorzy:
Barnat, W.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/387409.pdf
Data publikacji:
2010
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
energochłonność
wytrzymałość
konstrukcja
badania
energy-consuming
strength
composite
construction
researches
Opis:
W artykule przedstawiono ocenę zastosowanego wypełnienia na zdolność pochłaniania energii przez kompozytowy element konstrukcji cienkościennej obciążonej dynamicznie. Elementy energochłonne wykonano w KMiIS. Badania przeprowadzono na maszynie wytrzymałościowej Instron. Badaniom poddano elementy energochłonne w postaci tulejek z dodatkowym wypełnieniem pianowym. Obciążenie realizowano poprzez osiowe wymuszenie kinematyczne.
The opinion of applied fullfilment is on ability the aim of the absorption through composite unit of thin-walled construction the energy weighted down dynamically. Energy-consuming units were executed in KMiIS. It investigations were conducted was on stamina machine engine Intron. The investigations were subjected in figure of muffs the energy-consuming units from additional foam fullfilment. Weight was realized by axial input function kinematic.
Źródło:
Acta Mechanica et Automatica; 2010, 4, 3; 5-8
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aluminium foam testing for impact energy absorption aims
Autorzy:
Niezgoda, T.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/245628.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aluminium foam
microstructure modelling
open cell foam
closed cell foam
Opis:
Aluminium foams are a new group of materials used for impact energy absorbing elements. They are light (typically 10-25% of the density of the metal they are made of) and stiff, and are frequently proposed as a light weight structural material. That is why they often are applied in automotive and transport industry solutions, for example as parts of bumpers. The methods of numerical modelling for open and closed cell aluminium foams are presented in the paper as well as closed and open cellfoam microstructure model. The numerical models of foam ideal microstructures created with shell finite elements are shown. The models were developed on the basis of Kefain tetrakaidecahedrons - structures consisting of six squares and eight hexagons. In the case of closed cell foams, the polyhedron with full walls was adopted. In the case of open cell foams the circle wholes were removed from polyhedron surfaces. Then the numerical analysis of a created models compressive test was carried out with the usage of LS Dyna computer code. The nonlinear procedures were applied. The results were analyzed in the scope of energy absorbing properties of aluminium foams.
Źródło:
Journal of KONES; 2009, 16, 3; 283-289
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of energy-absorbing capabilities of flexible elements in the aspect of applied materials
Badania energochłonności elementów podatnych w aspekcie zastosowanych materiałów
Autorzy:
Barnat, W.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/241727.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
bezpieczeństwo transportu
elementy energochłonne
wpływ materiału na energochłonność
transport security
energy-absorbing element
influence of material on energy-absorbing capabilities
Opis:
The paper deals with the problem of improvement of transport security through application of additional elements absorbing the crash energy. Experimental tests and numerical simulations of basic energy-absorbing elements in a shape of a sleeve made of steel, duralumin, bronze and glass-epoxy composite were presented. The results of the investigation will be used to develop a reliable numerical model of a panel of protective elements. The numerical analysis was carried out by the Finite Element Method using the DYTRAN code. The calculations were verified experimentally on a universal testing machine INSTRON in the Department of General Mechanics of the Military University of Technology. On the basis of results of numerical and experimental investigations it was found that the composite sleeves have the specific absorbed energy twice higher than the steel ones. An interesting supplement of the energy dissipating system would be an additional element in the form of foams. It follows from the numerical calculation results that a higher specific absorbed energy was obtained for the composite energy absorbing element with filler. The proposed method, based on numerical investigation, will allow for eliminating expensive and long-lasting testing of real objects. The obtained results will serve as guidelines to develop methods of testing for such structures and can be used in further research on increasing the security level in road transport.
W pracy rozważono problem związany z poprawą bezpieczeństwa transportu przez zastosowanie dodatkowych elementów absorbujących energię uderzenia. Przedstawiono wyniki badań eksperymentalnych oraz symulacji numerycznych podstawowego elementu energochłonnego w postaci tulejki wykonanej ze stali, duraluminium, mosiądzu i kompozytu szklano epoksydowego. Wyniki tych badań posłużą do zbudowania wiarygodnego modelu numerycznego panelu elementów ochronnych. Analizę numeryczną wykonano metodą elektów skończonych w oprogramowaniu DYTRAN. Przeprowadzone obliczenia zostały zweryfikowane eksperymentalnie na maszynie wytrzymałościowej INSTRON w Zakładzie Mechaniki Ogólnej WAT. W wyniku badań numerycznych i eksperymentalnych stwierdzono, iż tulejki kompozytowe mają dwukrotnie większą względną energię absorpcji niż tulejki stalowe. Interesującym jest uzupełnienie układu rozpraszającego energię o dodatkowy element w postaci pian. W wyniku obliczeń numerycznych stwierdzono, iż względną maksymalną energię odkształcenia uzyskano dla kompozytowego elementu energochłonnego z wypełniaczem. Proponowana metoda oparta na badaniach numerycznych pozwoli na wyeliminowanie kosztownych i długotrwałych badań rzeczywistych obiektów. Otrzymane wyniki posłużą jako wytyczne do opracowania metodyki badania tego typu struktur i będą mogły być wykorzystywane w dalszych pracach badawczych w zakresie zwiększenia poziomu bezpieczeństwa w transporcie drogowym.
Źródło:
Journal of KONES; 2007, 14, 1; 27-38
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of influence of the shape of protective structures on their energy-absorbing capabilities
Analiza wpływu kształtu struktur ochronnych na ich energochłonność
Autorzy:
Barnat, W.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/241729.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
wpływ kształtu na energochłonność
impuls ciśnienia
energochłonność
influence of shape on energy-absorbing capability
pressure impulse
energy-absorbing capabilities
Opis:
The paper presents results of numerical investigation of the influence of the shape of a protective element on its energy-absorbing capabilities from the point of view of its resistance to the impact of a shock wave. The works carried out so far confirm that-- as far as the energy-absorbing capabilities are concerned - the shape of the protective element is an important factor. In the paper, results of numerical analysis of basic protective structures in the shape of pyramids, cones and hemispheres were presented. In the numerical models under consideration, dimensions of the base and height of the element were settled. The shape of the base determines the lateral surface of a cone. For the settled dimensions, a cone has the smallest area of the lateral surface and a sphere - the largest. For the models of basic structures, computations were performed with the use of the Dytran programme. As a result of the analysis, deformation of the structures, energy of deformation, velocities and accelerations were obtained. In the paper, a criterion for the assessment of energy absorption capabilities was proposed. It consisted in comparing the results for plates with a protection structure with those for a basic smooth plate in order to assess the level of energy absorbed by the protected plate with respect to the basic one (without protection).The comparison of results for the basic plate and the one with a spherical element shows that the application of the structure would cause the relative displacement of the plate protected a spherical element 50 percent lower than the relative displacement of the plate without protection.
W niniejszym artykule przedstawiono wyniki z przeprowadzonych badań numerycznych nad wpływem kształtu elementu ochronnego na energochłonność pod kątem odporności na działanie fali uderzeniowej. Dotychczasowe prace nad elementami energochłonnymi potwierdzają, iż dość ważnym z punktu widzenia energochłonności jest kształt elementu energochłonnego. W artykule przedstawiono wyniki z analizy numerycznej podstawowych struktur energochłonnych w postaci ostrosłupów stożków i półsfery. W modelach numerycznych ustalono wielkość podstawy oraz wysokość elementu struktury. Kształt podstawy determinuje pole powierzchni elementu. Najmniejsze pole powierzchni bocznej ma stożek. Największe pole powierzchni charakteryzuje sferę. Dla modeli struktur podstawowych wykonano obliczenia programem Dytran. W wyniku analizy numerycznej otrzymano postacie deformacji struktur, energię odkształcenia prędkości oraz przyspieszenia. W pracy przyjęto kryterium oceny energochłonności, polegające na porównaniu wyników płyt ze strukturą ochronną z płytą bazową gładką, w celu oceny zmiany poziomu energii pochłoniętej przez płytę zabezpieczoną w stosunku do płyty bazowej (bez zabezpieczenia). Porównanie wyników dla blachy bazowej i blachy z elementem sferycznym pokazuje, że zastosowane struktury powodowały względne przemieszczenie węzła płyty chronionej elementem sferycznym mniejsze o 50% od względnego przemieszczenia płyty.
Źródło:
Journal of KONES; 2007, 14, 1; 15-26
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical calculations of RVE dimensions for two-phase material
Autorzy:
Miedzińska, D.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/242298.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
microstructure
two-phase material
metal-ceramic composite
RVE
Opis:
A representative volume element (RVE) is a statistical representation of typical material properties. It should contain enough information on the microstructure thereby be sufficiently smaller than the macroscopic structural dimensions. The paper deals with the numerical calculations of the dimensions of the RVE for a two-phase material microstructure. Two and three dimensional models are taken into consideration. The structure of the samples are developed on the base of randomization of elements belonging to one of the phases. The phases volume share is 50/50%. The following series of the models are analyzed: from 10 x 10 to 100 x 100 elements for 2D samples and from 10 x 10 x 10 to 100 x 100 x 100 elements for 3D samples. The element characteristic dimension is 10 jm. The elastic behavior of the base materials (magnesium and alumina) is taken into account. The quasi-static compression tests of the developed structures are carried out with the use of LS-DYNA computer code. The results are presented as the equivalent Young modulus values and compared to the calculations based on the rule of mixtures. The stabilization of the achieved results allows to assess the dimensions of the RVE for two-phase material with random distribution.
Źródło:
Journal of KONES; 2011, 18, 2; 303-310
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical-experimental investigation of failure energy of composite energy absorbing panels
Numeryczno doświadczalne badanie energii zniszczenia podstawowych struktur kompozytowych
Autorzy:
Niezgoda, T.
Barnat, W.
Powiązania:
https://bibliotekanauki.pl/articles/242802.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
elementy energochłonne
kompozyty
modele numeryczne
analiza numeryczna
energy absorbing elements
composites
numeric models
numerical analysis
Opis:
The aim of the paper is an assessment of the influence of the applied fill on the energy absorbing capabilities of a composite element of a thin-walled structure under dynamic load. The experimental tests were carried out on the INSTRON universal testing machine. The analysis concerned energy absorbing elements in a shape of sleeves with additional foam fill. The numeric model charge was made like in previously carried out experiments, using cinematic input function. Analysed models were charged by a rigid plate, described by a material MATRIG type. Foam filler use had for result the energy absorption improvement; this is important in the case of modernisation of existing structures using foam filler. An important advantage of energy absorbing elements made of composite materials is their little mass. In the case of considering of protection elements for aviation industry, this factor is very important. The presented results are preliminary tests of energy absorbing filler choice and will be applied for numeric models validation. The conclusion of preliminary estimation of obtained elements is that the appropriate choice of filler material will permit to obtain more important energy necessary for destruction of energy absorbing structure. The future application of numeric analyse will facilitate the process of filler parameters optimisation.
Źródło:
Journal of KONES; 2007, 14, 4; 307-318
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of progressive failure of composite energy absorbing structures
Autorzy:
Niezgoda, T.
Barnat, W.
Powiązania:
https://bibliotekanauki.pl/articles/243301.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport safety
road barriers
numerical analysis
energy-absorbing element
FEM
Opis:
The aim of the paper was to compare the influence of the applied fill on the energy absorbed by the energy ubsorbing structural elements made of composite, steel and from composite with fill foam. The experimental tests were carried out on an INSTRON universal testing machine at the speed rate of the machine's traverse equal 10 mm/min md the numerical analysis has been performed using MSC. Dytran software based on the Finite Element Method. The elements were subjected to axial kinematic loads. The higher specific absorbed energy occurs in the case of energy absorbing elements made of composites and from composite with fill foam. These elements can be applied in structures designed for the protection of people or limitation of the whole structure failure, e.g. in the case of a helicopter or car crash etc. The failure progressing in a relatively uniform manner results in the fact that the work md for failure of an energy absorbing element causes a substantial reduction of the impact load results. Application of energy absorbing elements may be a system dissipating the energy of a car impact into a crash barrier. The results of numerical simulation of stiffness plate hitting to the road barrier are presented. Experimental tests and numerical simulations were also presented for a composite sleeve subjected to progressive failure, which allowed carrying out simulation and analysis of a crash into a road barrier protected by a system of two such sleeves.
Źródło:
Journal of KONES; 2008, 15, 1; 169-181
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study of the projectile trajectory disturbing during the oblique impacts
Autorzy:
Morka, A.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/244096.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
computational mechanics
impact problem
armour perforation
ballistic resistance
oblique impact
Opis:
The numerical investigations have been performed to determine the effect of the projectile trajectory disturbing during oblique impacts. An impact of the 14.5x118 mm B32 armour piercing projectile on the A12O3 different shape elements backed by 7017 aluminum alloy plate was analyzed. The oblique impact was realized by different shapes of the frontal ceramic elements, including hemispheres and pyramids, with respect to standard flat tiles. The influence of the impact point location was also under considerations. The Computer simulations were performed with the Element Free Galerkin Method (EFG) implemented in LS-DYNA code. full 3D models of the projectile and targets were developed with strain rate and temperature dependent material constitutive relations. The Johson-Cook model was applied to describe the metallic parts, while the ceramic was modelled by Johnson-Holmquist constitutive relations. The models of the projectile, ceramic and aluminium alloy targets were validated with utilization of the experimental datafound in literature. The obtained results confirmed that the projectile trajectory undergoes essential deviation because of the projectile angular velocity. The conditions for maximizing the value of this angular velocity were studied and it is possible to reach several radians per millisecond. The conclusions presented in this paper can be applied to develop modern impact protection panels where the appropriate balance between the mass and protection level must be accomplished.
Źródło:
Journal of KONES; 2010, 17, 3; 307-312
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermomechanical FE analysis of the engine piston made of composite material with low histeresis
Autorzy:
Szurgott, P.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/244407.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engine piston
composite piston
coefficient of thermal expansion
thermal analysis
FE analysis
Opis:
The main purpose of the preliminary analyses presented in the paper was to compare the behaviour of the combustion engine piston made of different type of materials under thermal load. A thermomechanical FE analysis of the engine piston made of composite material was shown. A selected engine is installed in one of the popular polish tanks. The proposed new material is characterized by a low hysteresis – the differences of the coefficient of thermal expansion for heating and cooling are not significant. The results obtained for the piston made of a new material were compared with those for the current standard material. The piston was loaded by a temperature field inside it. Appropriate averaged thermal boundary conditions such as temperatures and heat fluxes were set on different surfaces of the FE model. FE analyses were carried out using MSC.Marc software. Development of the FE model was also presented. Geometrical CAD model of the piston was developed based on the actual engine piston, which was scanned using a 3D laser scanner. A cloud of points obtained from the scanner was processed and converted into a 3- dimensional solid model. FE model of a quarter part of the piston was developed for the preliminary analysis presented in the paper. 4-node tetrahedron finite elements were applied since there was no axial symmetry of the considered object. The temperature field inside the piston was determined and presented in the form of contour bands. Contours of displacement and stress in a radial direction were shown as well.
Źródło:
Journal of KONES; 2011, 18, 1; 645-650
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CI engine as a case study of thermomechanical FE analysis of the piston - piston rings - cylinder system
Autorzy:
Szurgott, P.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/247997.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engine piston
composite piston
thermomechanical analysis
FE analysis
Opis:
The compression-ignition engine as a case study of a methodology of the numerical modelling and simulation of the piston - piston rings - cylinder system was presented in the paper. Thermomechanical FE analysis, taking into account thermal and mechanical loads, was carried out using the MSC.Marc/Mentat software. The mechanical loads included loads due to inertial and gas forces as well. A three dimensional solid geometrical model of the considered set was developed using AutoCAD software, whereas the finite element mesh was generated using Altair HyperMesh. Kinematic boundary conditions - the vertical displacement and acceleration of the piston - were described by the corresponding curves as a function of time for selected engine speed. Changes in pressure on the piston crown were estimated based on data from the engine manufacturer and the corresponded indicator diagram available in the literature. The results of thermomechanical FE analysis were presented in the form of stress and/or displacement contours. The main aim of the analysis was to determine the deformation of the piston depending of on the piston material. Two types of material were compared - the actual one PA12 aluminum alloy and the new composite material with low hysteresis. The second material was characterized by slight differences of the coefficient of thermal expansion for heating and cooling.
Źródło:
Journal of KONES; 2012, 19, 1; 399-406
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prototypowy wagon i system do transportu intermodalnego naczep samochodów ciężarowych
Autorzy:
Krasoń, W.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/305165.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Druk-Art
Tematy:
wagon specjalny z obrotową platformą ładunkową
laboratoryjne i numeryczne badania wytrzymałości
wybrane problemy zastosowania systemu transportu intermodalnego
railway wagon
railway wagon with rotatable loading floor
mechanism for rotating
Opis:
W pracy przedstawiono wybrane etapy prac konstrukcyjnych wspomaganych przez analizy numeryczne prototypowego wagonu kolejowego z płaską i nisko umieszczoną platformą obrotową. Wagon taki można wykorzystać do transportu różnego typu pojazdów, takich jak ciągniki, ciężarówki, przyczepy, naczepy i kontenery. Wagon umożliwia szybki i wygodny załadunek i rozładunek pojazdów (bez urządzeń dźwigowych), samozaładunek i rozładunek bez terminali i specjalnego zabezpieczenia logistycznego, wymagany jest tylko utwardzony peron bez dodatkowej infrastruktury. Każdy wagon stanowiący część składu kolejowego może być załadowany/rozładowany oddzielnie.
Numerical analysis of the railway wagon with a rotatable, low and flat loading floor was presented in the paper. Such structure can be used for transporting various types of vehicles, such as tractors, trucks, trailers, semitrailers, cargo containers. The railway wagon allows quick and convenient loading and unloading of vehicles and containers (no cranes needed), self loading and unloading; no platform infrastructure required, instead of hardened, flat, surface; no need for hubs, terminals or special logistics. Each wagon can be operated separately.
Źródło:
Napędy i Sterowanie; 2016, 18, 1; 73-81
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FE numerical tests of railway wagon for intermodal transport according to PN-EU standards
Autorzy:
Krason, W.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/202087.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
prototype railway wagon for intermodal transport
FE methodology of numerical tests
analysis of the wagon strength and dynamics simulations according to PN-EU standards
prototyp wagonu kolejowego transportu intermodalnego
FE
metodologia testów numerycznych
analiza wytrzymałości wagonu
symulacja dynamiki wagonu
normy PN-EN
Opis:
A special wagon, presented in the paper, can be used for intermodal transport of various types of vehicles. It enables transport of vehicles of 36 tons mass and height of 4m on the GB1 clearance height. An innovative wagon is equipped with a frame-support with marginal parts mounted on standard biaxial bogies and the central part lowered with a rotatable loading platform. The rotating part of wagon acts as a kind of platform, allowing truck to move through it during load/unload. During railway operation, this rotating platform is to become an integrated part of the wagon; the tailboards of the rotating part will be connected to the over-bogie part with the special locks. A unique concept of the wagon structure forced a design approach which was rather unusual for the rail industry. Since the design team aimed at very challenging demands of GB1 envelope and usage of standard bogies, the layout of the wagon had to be thoroughly examined in terms of its overall stiffness. Every major design change had to be simulated in order to accurately predict its influence on the whole wagon structure. FE analysis was used for numerical tests of such a wagon structure in different configurations. The calculations were carried out on the basis of PN-EN standards. Selected results of numerical tests of the prototype version of a such wagon for intermodal transports were presented in the paper.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 843-851
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza podatnych elementów kompozytowych w zastosowaniu do poprawy energochłonności barier drogowych
Analysis of flexible composite elements applied to improve energy absorbing capabilities of road barriers
Autorzy:
Niezgoda, T.
Barnat, W.
Powiązania:
https://bibliotekanauki.pl/articles/208940.pdf
Data publikacji:
2006
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
bezpieczeństwo transportu
bariera ochronna
nowe technologie
transport security
protective barriers
new technologies
Opis:
W pracy rozważono problem związany z poprawą bezpieczeństwa transportu poprzez zastosowanie dodatkowych elementów absorbujących energię uderzenia w układzie barier drogowych. Przedstawiono wyniki badań eksperymentalnych oraz symulacji numerycznych podstawowego elementu energochłonnego w postaci tulejki wykonanej ze stali i kompozytu szklano-epoksydowego. Wyniki tych badań posłużyły również do zbudowania wiarygodnego modelu numerycznego barierki drogowej i przeprowadzenia symulacji najazdu na barierkę. Otrzymane rezultaty pozwoliły ocenić przydatność proponowanego rozwiązania w praktyce.
The paper presents the problems connected with improvement in transport security by using additional elements absorbing the crash energy. Experimental tests and numerical simulations of a basic energy-absorbing element, in a shape of a sleeve made of steel and glass-epoxy composite, were presented. The investigation results were used to develop a reliable numerical model of a road barrier and to carry out the simulation of an impact on the barrier. The simulation enabled us to assess applicability of the proposed solution.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2006, 55, 4; 21-43
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon dioxide geosequestration method coupled with shale gas recovery
Autorzy:
Niezgoda, T.
Małek, E.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/298651.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
shale gas
carbon dioxide
geosequestration
Opis:
Shale gas in the United States over the past decade, and interest has spread to potential gas shales in Canada, Europe, Asia, and Australia. One analyst expects shale gas to supply as much as half the natural gas production in North America by 2020. Carbon dioxide capture and storage (CCS) is a set of technologies for the capture of CO2 from its anthropogenic point sources, its transport to a storage location, and its geosequestration. This is only one, though very important, option in a portfolio of actions to fight the increase of atmospheric CO2 concentration and to mitigate climate change, while at the same time allowing for the continued use of fossil fuels. Deployment of CCS technologies is expected to be limited in the next 5-10 years, but to contribute significantly to the reduction of CO2 emissions 20 years from now. Capture of CO2 using existing separation techniques can be applied to large point sources, i.e. power plants or industrial plants; CO2 can be easily transported over large distances using pipelines and ships; finally CO2 can be permanently stored in suitable deep geological formations, namely deep saline aquifers, oil or gas reservoirs, and unmineable coal seams, or it can be fixed in carbonates. The paper deals with the innovative method of carbon dioxide storage coupled with gas shale fracturing and methane recovery developed in the Military University of Technology. It allows to effectively mine the shale gas and to store carbon dioxide in shale rock. It must be noticed that CO2 pollution is a very important problem in Poland, because of European Union CO2 limits. Also carbon dioxide thermodynamic process of decompression numerical calculation, which simulates the injection of the cold liquid gas into the shale formation (high temperature and pressure conditions) and its influence on shale rock fracturing as well as initial experimental verification of the method was presented in the paper.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 161-167
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies