Temat: Modelling - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Micro- vs. Macro scope simulation in BPM modelling
Autorzy:: Pietroń, R.
Powiązania:: https://bibliotekanauki.pl/articles/94815.pdf
Data publikacji:: 2018
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: BPM
simulation modelling
macroscopic modelling
microscopic modelling
macrosimulation
microsimulation
Opis:: The business structure and process development in many modern companies is assisted by architectures, frameworks, and a new generation of computer systems with a broad representation of methods and tools of design and modelling, i.e. object-oriented, event-oriented, activity-oriented, process-oriented, agent-oriented, communication-oriented, behaviour-oriented, etc. are recommended. The aim of this paper is to compare micro- vs. macro scope modelling and to investigate the relevance of micro- and/or macro simulation in the context of business process management (BPM) modelling for organizational design/redesign. The BPM modelling features and some specific issues of simulation modelling are discussed. Combined with BPM modelling methodologies, these issues are used to drive a concept for development of an integrated methodology for BPM models’ building and simulation approach in organizational BPM design/redesign projects.
Źródło:: Information Systems in Management; 2018, 7, 4; 246-257
2084-5537
2544-1728
Pojawia się w:: Information Systems in Management
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sustainable development in the regional dimension – soft model
Autorzy:: Perło, Dorota
Powiązania:: https://bibliotekanauki.pl/articles/658409.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:: soft modelling
econometric modelling
sustainable development
Opis:: Celem artykułu jest prezentacja modelu miękkiego zrównoważonego rozwoju. Modelowanie miękkie umożliwia badanie powiązań między zmiennymi nieobserwowalnymi. W oparciu o teorię zrównoważonego rozwoju zbudowany został model pokazujący zależności między gospodarką, społeczeństwem a środowiskiem oraz ich wpływ na zrównoważony rozwój. Przeprowadzona analiza wyników wskazuje optymalne proporcje pomiędzy poziomem rozwoju gospodarczego, społecznego i środowiskowego, które umożliwią przyszłym pokoleniom korzystanie z istniejących zasobów i walorów.
Źródło:: Acta Universitatis Lodziensis. Folia Oeconomica; 2011, 255
0208-6018
2353-7663
Pojawia się w:: Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Geophysical properties of the crust and upper mantle of the ocean-continent transition in Svalbard area
Autorzy:: Grad, Marek
Majorowicz, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/2041833.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Arctic
Spitsbergen
seismic modelling
gravity modelling
thermal modelling
lithosphere−asthenosphere boundary
Źródło:: Polish Polar Research; 2020, 41, 1; 1-22
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Multiscale approach to structure damage modelling
Wieloskalowe podejście do modelowania uszkodzeń konstrukcji
Autorzy:: Paćko, P.
Uhl, T.
Powiązania:: https://bibliotekanauki.pl/articles/280897.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: multiscale damage modelling
delamination modelling
ductile damage modelling and experimental validation
Opis:: The paper deals with the problem of modelling of different types of damages in metallic and composite structures. The modelling of damage and fracture plays an important role in design and implementation of Structural Health Monitoring systems, particularly it is very important in prognosis of the rest of safe life of structures. The authors overview and analyse the existing methods and available tools of damage and fracture modelling. The application of selected models for structure damage and fracture modelling in macro and micro scale simulations is the main subject of this paper. Two groups of models are considered; the first group consists of models capable of predicting brittle fracture, second – models used for ductile damage evaluation. In the latter group, macro and multiscale models are presented. Finally, the multiscale damage model based on a representative volume element is presented. The grain structure modelling and its FE implementation are discussed in conjunction with application of ductile damage criterion for grain structures. Several numerical examples are presented.
Modelowanie uszkodzeń i pęknięć konstrukcji odgrywa bardzo istotną rolę w projektowaniu i implementacji systemów monitorowania stanu konstrukcji (SHM) oraz jest szczególnie istotne dla prognozy czasu bezawaryjnej pracy obiektów. Autorzy prezentują przegląd i analizę dostępnych metod i narzędzi pozwalających na modelowanie uszkodzeń konstrukcji metalicznych i kompozytowych. Głównym tematem pracy jest zastosowanie wybranych modeli uszkodzeń konstrukcji do symulacji uszkodzeń w skalach mikro oraz makro. Przeanalizowane zostały dwie grupy modeli; modele pozwalające na symulację zjawiska pękania kruchego oraz modele wykorzystywane do analizy uszkodzeń plastycznych. W drugiej grupie rozpatrzono modele w skali makro oraz modele wieloskalowe. W pracy zaprezentowano wieloskalowy model bazujący na elemencie objętościowym (RVE). Omówione zostało modelowanie struktur ziarnistych oraz implementacja z wykorzystaniem metody elementów skończonych w połączeniu z zastosowaniem kryteriów pękania plastycznego dla struktur ziarnistych. W pracy zaprezentowane zostały wyniki symulacji numerycznych oraz ich weryfikacja eksperymentalna.
Źródło:: Journal of Theoretical and Applied Mechanics; 2011, 49, 1; 243-264
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of unsteady forces acting on a slender cylinder
Autorzy:: Ziółkowski, P. J.
Witkowski, W.
Sobczyk, B.
Powiązania:: https://bibliotekanauki.pl/articles/175172.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: unsteady flow
FSI
CFD modelling
CSD modelling
Opis:: Developments in construction engineering (new materials, construction techniques) facilitate the design of very flexible, light structures with low damping which unfortunately results in higher susceptibility of these structures to wind action. It is therefore necessary to use more accurate scientific tools in the engineering phase of these structures. Analytical methods for considering wind effects on structures encounter difficulties with respect to mathematical formulations of aerodynamic forces. In this paper a 2D numerical model has been described which considers the fluid domain with respect to a cylindrical obstacle. This 2D model has been discretized using the finite volume method, and numerical simulations have been undertaken in order to describe the unsteady flow conditions within the analyzed domain. The simulations have been performed with boundary conditions characterizing the flow past a cylindrical obstacle. The results have been compared with the literature data from similar experiments. On the basis of the flow characteristics obtained, as well as the spatial distributions of the flow parameters, a model for further 3D analyses was selected. Next, a 3D numerical study of unsteady flow forces acting on a slender cylinder has been analyzed. Toward the end, a two-way fluid solid interaction approach has been utilized, which incorporates a computational fluid dynamics approach combined with computational solid dynamics.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2018, 140; 23-38
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Isotropic damage in viscoplastic flow conditions, FEM applications with practical examples
Autorzy:: Kłosowski, P.
Pyrzowski, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/243317.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: FEM
viscoplacticity
isotropic damage
constitutive modelling
numerical modelling
Opis:: The damage mechanics is a very important branch of solid mechanics. Although it is still developing, it has already been applied to many engineering problems. Among many various types of damage models, which are commonly used, the main subject of this paper is the isotropic continuous damage in viscoplastic flow conditions. This paper include Information about the viscoplastic type of constitutive modelling, the presentation of mechanical representation of damage by the scalar variable D, effective stress concept, equations of the chosen isotropic damage model, the Chaboche viscoplastic constitutive model including damage effects and the identification procedure of damage material parameters with practical example. The chosen constitutive model is easy to apply to the finite element analysis. Using the MSC.Marc system, which great advantage is possibility ofa user subroutine application, the geometry nonlinear finite element analysis of plate and shell structures including damage is possible. This paper includes description of the applied program and user subroutines applied: UVSCPL - viscoplastic modelling (the standard MSC.Marc system supports the Chaboche model, but not in the damage variant) and UACTIV - deactivation of finite elements. The last part of the paper includes the practical numerical example of a clamped bar of 0.3 m long and 0.1x0.01 m cross-section size. In calculations the four-node thin-shell, divided into five layers, elements were used. dynamic, geometrically nonlinear analysis using Newmark integration algorithm has been performed. As the results, screen shots of displacements with maps of damage parameter for the bar infour time moments are presented.
Źródło:: Journal of KONES; 2008, 15, 1; 127-136
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Numerical Analysis of the Structure of Liquid Flow in the Tundish with Physical Model Verification
Autorzy:: Merder, T.
Powiązania:: https://bibliotekanauki.pl/articles/352430.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: steelmaking
continuous casting
tundish
numerical modelling
physical modelling
Opis:: Detailed studies of the movement of liquid steel (hydrodynamics) on a real object are practically impossible. The solution to this problem are physical modelling carried out on water models and numerical modelling using appropriate programs. The method of numerical modelling thanks to the considerable computing power of modern computers gives the possibility of solving very complex problems. The paper presents the results of model tests of liquid flow through tundish. The examined object was model of the twonozzle tundish model. The ANSYS Fluent program was used to describe the behavior of liquid in the working area of the tundish model. Numerical simulations were carried out using two numerical methods of turbulence description: RANS (Reynolds-Averaged Navier-Stokes) – model k-ε and LES (Large Eddy Simulation). The results obtained from CFD calculations were compared with the results obtained using the water model.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 4; 1895-1901
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: System for Flexible Modelling of Production Cycles Based on Flat Rolling
Autorzy:: Rauch, L.
Madej, L.
Golab, R.
Pietrzyk, M.
Powiązania:: https://bibliotekanauki.pl/articles/971267.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: separated modelling
integrated modelling
technology design
rolling
optimization
Opis:: The paper presents design and implementation of computer system dedicated to simulation of production cycles based on the rolling processes. The main functionality of the computer system, i.e. support and facilitation of flat rolling technology design, is obtained through flexible interface combined with the modular architecture of numerical library and optimization procedures. Each production cycle (e.g. heating, rolling, cooling, coiling) is prepared to be calculated separately and finally integrated into the sophisticated production cycle. The architecture of designed software as well as models used for numerical calculations are described in details.The system was tested for various configurations of rolling mills. Three of them together with obtained results are presented in the paper: complex production cycle (roughing and finishing rolling), finishing rolling composed of seven passes and laboratory case study.
Źródło:: Journal of Machine Engineering; 2009, 9, 4; 39-48
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Modelowanie facjalne i parametryczne jako narzędzie analizy i integracji spektrum danych geologiczno-geofizycznych
Facies and property modelling as a tool of analysis and integration of geological and geophysical data
Autorzy:: Sowiżdżał, K.
Stadtmüller, M.
Słota-Valim, M.
Powiązania:: https://bibliotekanauki.pl/articles/2075116.pdf
Data publikacji:: 2014
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: modelowanie 3D
modelowanie facji
modelowanie własności
3D modelling
facies modelling
property modelling
Opis:: Workflow of 3D static reservoir modelling, with the emphasis on the different types of data integration is discussed in the paper. The example of two-stage integration of geophysical (seismic and well log), petrophysical, sedimentological and reservoir engineering data within a framework of 3D static reservoir models is given. The main goal of the first stage of data integration is to obtain consistent well profiles of reservoir parameters such as: porosity, permeability, facies, water saturation. For that purpose the example of use of the following data types were presented: well logs, lab data, sedimentological interpretation, well tests and mud logging results. The second stage includes construction of structural model, defining the geometry of analyzed geological object, facies/lithological modelling; calibration of facial and petrophysical well profiles with 3D seismic, usually represented by results of seismic inversion, seismic attributes and meta-attributes and finally, the calculation of the spatial distribution of analyzed reservoir properties.
Źródło:: Przegląd Geologiczny; 2014, 62, 12; 818--824.
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Various approaches to magnetorheological elastomers structures FE modelling
Autorzy:: Miedzińska, D.
Niezgoda, T.
Boczkowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/245985.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: magnetorheological elastomer
FE modelling
multistage modelling
microscale
macro scale
Opis:: Magnetorheological elastomers (MREs) are the materials with rheological properties which can be rapidly and reversibly changed in a continuous way by the applied magnetic field. They are the solid analogues of magnetorheological fluids (MRFs) consisting of magnetically permeable particles (such as iron) added to a viscoelastic polymeric material prior to crosslinking. In the paper different approaches to numerical modelling of the magnetorheological elastomers (MREs) structures are presented. The methods of the MRE micro- and macrostructural FE simulations are taken into consideration. The first approach is connected with the microstructural behaviour of the iron particles situated in the pure elastomer and subjected to the mechanical or magnetic load. The second approach is related to global material properties consideration and macrostructural behaviour modelling. The paper shows that there are many ways of such new materials structure behaviour modelling. All the FE analyses always need to be verified with the experiments as well as for macro- and micro scale material reactions, properties and phenomena describing.
Źródło:: Journal of KONES; 2010, 17, 1; 255-260
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: A discrete-continuous method of mechanical system modelling
Autorzy:: Hein, R.
Powiązania:: https://bibliotekanauki.pl/articles/258662.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: modelling
mechanical system
dynamic systems
vibrations
hybrid modelling methods
Opis:: The paper describes a discrete-continuous method of dynamic system modelling. The presented approach is hybrid in its nature, as it combines the advantages of spatial discretization methods with those of continuous system modelling methods. In the proposed method, a three-dimensional system is discretised in two directions only, with the third direction remaining continuous. The thus obtained discrete-continuous model is described by a set of coupled partial differential equations, derived using the rigid finite element method (RFEM). For this purpose, firstly the general differential equations are written. Then these equations are converted into difference equations. The derived equations, expressed in matrix form, allow to create a global matrix for the whole system. They are solved using the distributed transfer function method. The proposed approach is illustrated with the examples of a simple beam fixed at both ends and a simply supported plate.
Źródło:: Polish Maritime Research; 2017, S 1; 97-107
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Application of High Flow Rate Gas in the Process of Argon Blowing Trough Steel
Autorzy:: Merder, T.
Pieprzyca, J.
Warzecha, M.
Warzecha, P.
Powiązania:: https://bibliotekanauki.pl/articles/351630.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ladle
high intensity gas blowing
numerical modelling
physical modelling
Opis:: The article demonstrates results of modelling research tests concerning the analysis of possibilities of blowing gas into the metal bath at high flow rates in a steel ladle with a nominal capacity of 50 Mg. Various configurations concerning of gas introduction into the steel ladle were analysed. There were considered cases of blowing into the metal bath via one, two or three purging plugs, being installed on the bottom and via additional support for blowing the gas from the top through the lance. Results obtained from the water model of the reactor were verified with the results of numerical simulations.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2A; 905-910
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Constitutive modelling of root-reinforced granular soils - preliminary studies
Autorzy:: Switala, B.
Fern, E.J.
Powiązania:: https://bibliotekanauki.pl/articles/887535.pdf
Data publikacji:: 2018
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: soil
constitutive modelling
root reinforcement
granular soil
numerical modelling
Źródło:: Scientific Review Engineering and Environmental Sciences; 2018, 27, 2[80]
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Performance Evaluation of Machining Strategy for Engine-Block Manufacturing
Autorzy:: Tigist, A. F.
Bianchi, M. F.
Archenti, A.
Nicolescu, M.
Powiązania:: https://bibliotekanauki.pl/articles/100037.pdf
Data publikacji:: 2015
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: process modelling
machining strategies
engine-block manufacturing
dynamic modelling
Opis:: This paper will introduce a novel methodology for the performance evaluation of machining strategies of engine-block manufacturing. The manufacturing of engine components is vital to the automotive and vehicle manufacturing industries. Machining are a critical processes in the production of these parts. To survive and excel in the competitive manufacturing environment, companies need to improve as well as update their machining processes and evaluate the performance of their machining lines. Moreover, the lines and processes have to be robust in handling different sources of variation over time that include such examples as demand fluctuations, work-piece materials or even any changes in design specifications. A system dynamics modelling and simulation approach has been deployed to develop a methodology that captures how machining system parameters from the machining process are interacted with each other, how these connections drive performance and how new targets affect process and machine tool parameters through time. The developed model could provide an insight of how to select the crucial machining system parameters and to identify the effect of those parameters on the output of the system. In response to such an analysis, this paper provides (offers) a framework to examine machining strategies and has presented model that is useful as a decision support system for the evaluation and selection of machining strategies. Here a system dynamics methodology for modelling is applied to the milling operation and the model is based on an actual case study from the engine-block manufacturing industry.
Źródło:: Journal of Machine Engineering; 2015, 15, 4; 81-102
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Using the software of Navi-Trainer PRO 5000 simulator for assessment of the designed navigational infrastructure
Autorzy:: Czaplewski, K.
Zwolan, P.
Powiązania:: https://bibliotekanauki.pl/articles/320737.pdf
Data publikacji:: 2011
Wydawca:: Polskie Forum Nawigacyjne
Tematy:: navigation infrastructure
modelling
Opis:: The paper presents the possibility of using the navigational and maneuvering simulators software, for the verification of designed elements of navigational infrastructure. The article describes how to use the Navi - Trainer PRO 5000 simulator manufactured by Transas Marine to modeling sea waters. The Article is based on a scientific research project performed at the Institute of Navigation and Hydrography of Naval Academy of Gdynia. Project was aimed to check the possibility cut through the Vistula Spit and artificial connection the Gulf of Gdansk and Vistula Lagoon. The paper presents a description of creating a virtual basin with planned navigational infrastructure. There will by also presented the maneuvering tests for the assumed maximum ship model and few construction variants. Each of the project variants was tested in different hydro-meteorological conditions. The result of simulation tests are proposals that demonstrate the feasibility of the project and proposed possible changes affecting the level of safety.
Źródło:: Annual of Navigation; 2011, 18; 55-68
1640-8632
Pojawia się w:: Annual of Navigation
Dostawca treści:: Biblioteka Nauki

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