Search results for: deterministic modelling

• On finite element modelling of architectural fabrics for hanging roofs

  Publication

  • A. Ambroziak
  • P. Kłosowski
  • K. Woźnica

  - MACHINE DYNAMICS PROBLEMS - Year 2006

  Artykuł dotyczy modelowania konstytutywnego i identyfikacji parametrów materiałowych dla tkanin technicznych powszechnie stosowanych w konstrukcjach membranowo-cięgnowych. Autorzy przedstawiają krótką charakterystyke modeli stosowanych w opisie zachowania sie tkanin technicznych. Opisano metodę do idetyfikacji nieliniowo-sprężystych właściwości tkanin technicznych. Dodatkowo dokonao porówania wyników z prób jednoosiowego rozciągania...

  Full text to download in external service

• Machine Learning Modelling and Feature Engineering in Seismology Experiment

  Publication

  • M. Brykov
  • I. Petryshynets
  • C. Pruncu
  • V. Efremenko
  • D. Pimenov
  • K. Giasin
  • S. Sylenko
  • S. Wojciechowski

  - SENSORS - Year 2020

  Full text to download in external service

• Modelling and analysis of medium frequency transformers for power converters

  Publication

  • P. Dworakowski

  - Year 2020

  The evolutions in power systems and electric vehicles, related to the economic opportunities and the environmental issues, bring the need of high power galvanically isolated DC-DC converter. The medium frequency transformer (MFT) is one of its key components, enabled by the increasing switching frequency of modern power semiconductors like silicon carbide transistors or diodes. The increased operating frequency offers small...

  Full text available to download

• Nonlinear control systems modelling: global vs. local

  Publication

  • A. Dzielinski
  • W. Graniszewski

  - Year 2002

  Full text to download in external service

• Modelling the set of earthworks machinery with the use of computer simulation

  Publication

  • W. Rogala
  • H. Anysz

  - Przegląd Naukowy Inżynieria i Kształtowanie Środowiska - Year 2019

  Full text to download in external service

• Port-Based Modelling of Distributed-Lumped Parameter Systems

  Publication

  • C. Orlikowski
  • R. Hein

  - Solid State Phenomena - Year 2010

  There in the paper is presented an uniform, port-based approach to modelling of both lumped and distributed parameter systems. Port-based model of the distributed system has been defined by application of bond graph methodology and distributed transfer function method (DTFM). The approach proposed combines versatility of port-based modelling and accuracy of distributed transfer function method. The concise representation of lumped-distributed...

  Full text to download in external service

• Mathematical Modelling and Computer Simulation of Activated Sludge Systems

  Publication

  • J. Mąkinia

  - Year 2010

  Przegląd systemów osadu czynnego. Rozwój modeli procesu osadu czynnego. Podstawowe definicje z zakresu modelowania matematycznego i symulacji komputerowej. Proces budowy modelu (model biokinetyczny, hydrodynamiczny, transferu tlenu, temperatury). Modelowanie procesów biochemicznych zachodzących w systemach osadu czynnego. Organizacja badań symulacyjnych. Praktyczne zastosowania modeli osadu czynnego.

• Propagation Path Loss Modelling in Container Terminal Environment

  Publication

  • S. J. Ambroziak
  • R. Katulski
  • J. Sadowski
  • J. Stefański

  - Year 2011

  Full text to download in external service

• Modelling of shear zones in granular materials within hypoplasticity.

  Publication

  • J. Tejchman

  - Year 2004

  W artykule przedstawiono wyniki numerycznej analizy ściskania w płaskim stanie odkształcenia dla materiałów granulowanych. Obliczenia przeprowadzono z modelem hipoplastycznym rozszerzonym o obroty, nielokalność i gradienty odkształceń.

• Możliwości modelowania w biomechanice = Modelling capabilities in biomechanics

  Publication

  • S. Sobieszczyk
  • E. Wittbrodt

  - Year 2005

  Omówiono mozliwości modelowania w biomechanice. Zaprezentowano główne kierunki badań biomechanicznych oraz metody modelowania, w tym najbardziej popularne oprogramowania do symulacji komputerowej modeli biomechanicznych ciała człowieka. Przedstawiono metody wykorzystania programów komputerowych CHARM, SIMM oraz AnyBody System do utworzenia biomechanicznych modeli ramienia człowieka.

• Wind Turbine Operation in Electric Power System.Advanced Modelling

  Publication

  • Z. Lubośny

  - Year 2003

  W monografii przedstawiono zagadnienia związane z pracą elektrowni wiatrowych w systemie elektroenergetycznym, a w tym przedstawiono wpływ elektrowni wiatrowych na system elektroenergetyczny (jakość energii elektrycznej). Omówiono zasady modelowania elektrowni wiatrowych różnych typów, tj. z generatorami asynchronicznymi i synchronicznymi, pracujących w systemie elektroenergetycznym. Przestawiono wybrane modele elektrowni wiatrowych...

• Modelling of vertical wall influence on the single bubble motion.

  Publication

  • D. Mikielewicz
  • J. Wajs

  - Year 2004

  W referacie zaprezentowano rezultaty badań eksperymentalnych i modelowania matematycznego siły odpychającej, działającej na model pęcherzyka przepływający wzdłuż ściany pionowej. Zaobserwowano okresowy charakter tej siły oraz stwierdzono, że zależy ona od liczby Reynoldsa. Porównanie obliczonych i zmierzonych wartości siły wykazało satysfakcjonującą zgodność.

• Modelling of flow boiling process in small diameter tubes.

  Publication

  • D. Mikielewicz
  • J. Mikielewicz

  - Year 2004

  W pracy zastosowano standardową korelację wrzenia w przepływie (wyprowadzoną dla rur o konwencjonalnych wymiarach) do przypadków wrzenia w rurach o małych średnicach. Porównanie wyników obliczeń z danymi literaturowymi wykazało nieużyteczność tej korelacji. Wykazano zatem potrzebę prowadzenia badań podstawowych celem uzyskania korelacji pozwalającej umiejętnie przewidywać warunki wymiany ciepła w kanałach o małych średnicach.

• Modelling of Vertical Wall Influence on the Single Bubble Motion

  Publication

  • D. Mikielewicz
  • J. Wajs

  - STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING - Year 2005

  W referacie pokazano rezultaty badań eksperymentalnych i modelowania matematycznego siły odpychającej, działającej na model pęcherzyka przepływający wzdłuż ściany pionowej. Zaobserwowano okresowy charakter siły oraz stwierdzono, że zależy ona od liczby Reynoldsa. Porównanie obliczonych i zmierzonych wartości siły wykazało satysfakcjonującą zgodność.

• Modelling, thermography and digital processing of energy conversion processes

  Publication

  • J. Stąsiek

  - Year 2005

  W pracy przedstawiono zagadnienia modelowania fizycznego i numerycznego procesów wymiany ciepła i konwersji energii. Do analizy wymiany ciepła w przestrzeni wypełnionej płynem zastosowano termografie krystaliczne i komputerowy system analizy otrzymanych laserowych obrazów. Wykonano również termogramy powierzchni pokrytych także ciekłokrystaliczniei jako przykład przeanalizowano rozkład temperatury na powierzchniach ciał stałych...

• Modelling of complex economic systems : toward conceptual platform

  Publication

  • E. Szczerbicki
  • M. Waszczyk

  - International Journal of Enterprise Information Systems - Year 2006

  W artykule opisano rolę modelowania opisowego w ekonomicznych systemach złożonych w kontekście trzech funkcji naukowych: opisu, wyjaśniania i przewidywania. Fazy dekompozycji i opisu jakościowego modelowanych systemów, w tym ekonomicznych, są nieodzowne w całym procesie budowania modelu.

  Full text to download in external service

• An intelligent cellular automaton scheme for modelling forest fires

  Publication

  • J. Boters Pitarch
  • M. Signes-Pont
  • J. Szymański
  • H. Mora-Mora

  - Ecological Informatics - Year 2024

  Forest fires have devastating consequences for the environment, the economy and human lives. Understanding their dynamics is therefore crucial for planning the resources allocated to combat them effectively. In a world where the incidence of such phenomena is increasing every year, the demand for efficient and accurate computational models is becoming increasingly necessary. In this study, we perform a revision of an initial proposal...

  Full text available to download

• FEM modelling of screw displacement pile interaction with subsoil

  Publication

  • P. Więcławski
  • A. Krasiński

  - Archives of Civil Engineering - Year 2023

  Predicting the-settlement characteristics of piles is an important element in the designing of pile foundations. The most reliable method in evaluating pile-soil interaction is the static load test, preferably performed with instrumentation for measuring shaft and pile base resistances. This, however, is a mostly post-implementation test. In the design phase, prediction methods are needed, in which numerical simulations play an...

  Full text available to download

• Software tool for modelling of mechatronic systems with elastic continua

  Publication

  • C. Orlikowski
  • R. Hein

  - Year 2011

  The paper presents a systematic computational package for modelling and analysis of complex systems composed of multiple lumped and distributed parameter subsystems. The constructed computer program enables the frequency domain analysis of a class of linear systems and to obtain reduced order model in the form of bond graph. Obtained modal bond graph can be directly exported into 20-Sim package to further processing including nonlinear...

• Modelling method for a class of distributed-lumped parameter systems

  Publication

  • R. Hein
  • C. Orlikowski

  - Year 2011

  The paper presents an alternative approach for modelling and order reduction of continuous system. The proposed methodology combines application of two methods: the modal decomposition method and the rigid finite element method. The given continuous structure is divided into 1D continuous substructures. For each 1D substructure modal decomposition and reduction procedure is applied. Interactions between substructures are described...

• GENERALISED HERSCHEL MODEL APPLIED TO BLOOD FLOW MODELLING

  Publication

  • K. Tesch

  - TASK Quarterly - Year 2012

  This paper introduces a new rheological model of blood as a certain generalisation of the standard Herschel-Bulkley model. This model is a rheological constitutive equation and belongs to the group of the so-called generalised Newtonian fluids. Experimental data is compared with results, obtained from the new model, to demonstrate that it allows for the best agreement together with Luo-Kuang model. The new model may be easily implemented...

  Full text available to download

• A two dimensional approach for modelling of pennate muscle behaviour

  Publication

  • W. Wojnicz
  • B. Zagrodny
  • M. Ludwicki
  • J. Awrejcewicz
  • E. Wittbrodt

  - Biocybernetics and Biomedical Engineering - Year 2017

  The purpose of this study was to elaborate a two-dimensional approach for unipennate and bipennate striated skeletal muscle modelling. Behavior of chosen flat pennate muscle is modelled as a rheological system composed of serially linked passive and active fragments having different mechanical properties. Each fragment is composed of three elements: mass element, elastic element and viscous element. Each active fragment furthermore...

  Full text to download in external service

• GIS three-dimensional Modelling with geo-informatics techniques

  Publication

  • P. Ziółkowski
  • P. Tysiąc
  • J. Szulwic
  • K. Bobkowska

  - Year 2017

  The integration issue of virtual models and geo-referenced database have a very broad spectrum of potential applications. Before the integration issue was on the cusp, it was quite problematic to combine three-dimensional models with the geo-referenced database. An integrated database contains a variety of data including such as object orientated data model and raster data. Within this paper, authors present an integration process...

  Full text to download in external service

• Analytical method of modelling the geometric system of communication route

  Publication

  • W. Koc

  - MATHEMATICAL PROBLEMS IN ENGINEERING - Year 2014

  The paper presents a new analytical approach to modelling the curvature of a communication route by making use of differential equations. The method makes it possible to identify both linear and nonlinear curvature. It enables us to join curves of the same or opposite signs of curvature. Solutions of problems for linear change of curvature and selected variants of nonlinear curvature in polynomial and trigonometric form were analyzed....

  Full text available to download

• COMPREHENSIVE MODELLING OF THE COST EFFECTIVNESS OF RAILWAY LINE ELECTRIFICATION

  Publication

  • M. Tomczyk
  • M. Pacholczyk
  • K. Karwowski

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2016

  Subject of this paper is the mathematical model estimating the Economical threshold between usage of combustion engine traction and electrical traction for new and modernized railway passenger communication lines. Currently available models do not coincide with the whole complexity of the problem. The proposed model was implemented into Matlab and then validated on “Pomorska Kolej Metropolitalna” investment time-frame and its cost...

  Full text available to download

• Path Loss Modelling in the Untypical Outdoor Propagation Environments

  Publication

  • S. J. Ambroziak
  • R. Katulski

  - Year 2014

  In the paper three ways of path loss modelling in the untypical outdoor environments are presented. The exemplary untypical outdoor environment is analyzed. The investigated environment is characterized, and the measurement campaign are shortly described. The following models have been analyzed: the COST231 Walfisch-Ikegami model, the modified COST231Walfisch-Ikegami model tuned on the basis of empirical data, and the empirical...

• Modelling a 6-dof manipulator using Matlab software

  Publication

  • A. Barylski
  • N. Piotrowski

  - Archiwum Technologii Maszyn i Automatyzacji - Year 2014

  This paper presents an alternative approach to modelling a revolute robot. The manipulator in question is Kuka KR 16-2. The main problem in robot modelling is a kinematic analysis. The revolute robot consist of six rotary joints (6-DOF) with base, shoulder, elbow and wirst. The kinematics problem is defined as a transformation from the cartesian space to the joint space. The Denavit- Hartenberg (D-H) model of representation was...

  Full text to download in external service

• Secondary arc modelling for single pole reclosing analyses

  Publication

  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński
  • S. Czapp

  - Year 2015

  The paper discusses two evaluation methods of single pole auto-reclosing process effectiveness in HV transmission lines. Secondary arc current and recovery voltage calculation results obtained by load flow calculation are compared to the results obtained by the time domain simulations. Moreover, a nonlinear secondary arc model implementation is presented. The paper presents the study results for the three types of EHV transmission...

  Full text to download in external service

• Applying Generative Modelling Tools to Explore Architectural Forms

  Publication

  • M. Helenowska-Peschke

  - The Journal of Polish Society for Geometry and Engineering Graphics - Year 2012

  The digital generative methods open up new areas for exploration of formal and tectonic features, accentuate form’s ability to emerge and perform. They allow for automatic generation of variations of solutions, and digital production of “difficult” components of architectural forms using CNC technology.The paper deals with contemporary architectural explorations of complex , curvilinear surfaces in the context of generative...

  Full text available to download

• THE MODELLING OF ACCUMULATION AND DISSIPATION OF ENERGY IN MECHANICAL DRIVE SYSTEM

  Publication

  • A. Kaczmarski

  - Journal of Polish CIMEEAC - Year 2013

  This paper presents a modelling of accumulation and dissipation energy in simple drive system. The simple drive system is presented by laboratory stand designed for calculate fatigue life of material for bending and rotation tests pieces. The laboratory stand was prepared to diagnosis of fatigue life of material by use energetic methods. This idea was submitted as utility model to Polish Patent Office. This laboratory stand gives...

  Full text available to download

• Numerical FDM modelling of wave propagation in concrete structure

  Publication

  • B. Zima
  • R. Kędra

  - Prace Studentów Politechniki Wrocławskiej. Seria : Konferencje - Year 2015

  The article presents application of finite difference method to damage detection and its size evaluation in concrete structure by elastic wave propagation method. The simulations of wave propagation in concrete structure were performed for six different damage scenarios. Damages were modelled as areas with changed material properties. Investigation focused on the influence of damage size on the energy of wave reflection. Presented...

• Centrifuge modelling of tapered wall jacked into dense sand

  Publication

  • L. Bałachowski
  • W. F. Kabeta
  • L. Thorel
  • M. Blanc
  • T. Dubreucq

  - Year 2024

  A series of static penetration tests of trapezoidal walls in dense Fontainebleau sand were performed in the geotechnical centrifuge at Gustave Eiffel University. The models of wall with three different shapes (straight profile with thickness D=16mm, 0.75 degree and 1.5 degree of taper angle) but with the same volume were used. The soil mass was instrumented with five stress cells located at two levels at 2D, 4D and 6D distance...

  Full text available to download

• Computational modelling of historic masonry railroad arch bridges

  Publication

  • B. Sobczyk
  • Ł. Pyrzowski
  • M. Miśkiewicz

  - COMPUTERS & STRUCTURES - Year 2024

  The problems encountered during the analyzes of structural response of historic masonry railroad arch bridges are described in this paper. The attention is mainly focused on the stiffness of the masonry arches, their strengths and appropriate estimation of railroad load intensity. Issues related to computational modelling of two, existing, almost 130 years old masonry arch railroad bridges are presented in this context. The main...

  Full text to download in external service

• Optimization of Bread Production Using Neuro-Fuzzy Modelling

  Publication

  • T. M. Boiński
  • J. Szymański

  - Year 2023

  Automation of food production is an actively researched domain. One of the areas, where automation is still not progressing significantly is bread making. The process still relies on expert knowledge regarding how to react to procedure changes depending on environmental conditions, quality of the ingredients, etc. In this paper, we propose an ANFIS-based model for changing the mixer speed during the kneading process. Although the...

  Full text to download in external service

• Modelling of high frequency dynamic responses of engineering structures

  Publication

  • A. Żak
  • M. Krawczuk
  • G. Redlarski
  • W. Waszkowiak

  - Year 2017

  Modelling of high frequency dynamic responses of engineering structures, especially those related to wave propagation, is a real numerical challenge. Nowadays most of numerical models, used for that purpose, are based on the application of various finite element techniques. However, finite element discrete models may also be considered as possessing certain periodic structures, which may manifest themselves in particular scenarios....

• Modelling of performance of an AUV stealth vehicle. Design for operation.

  Publication

  • M. K. Gerigk

  - Year 2018

  In the paper some results of research connected with modelling of performance and risk assessment of an AUV stealth vehicle are presented. A general approach to design of the stealth AUV autonomous underwater vehicle under consideration is introduced. The basic stealth characteristics of the AUV stealth vehicle are briefly described. The method of research is introduced. The AUV stealth vehicle concept is presented including the...

  Full text to download in external service

• Modelling the loss of time caused by traffic incidents on motorways

  Publication

  • K. Birr
  • B. Strzebrakowska

  - Year 2018

  For each road incident important factors like location, capacity reduction, traffic management, duration of road incidents and amount of traffic should be defined. All performer operations and effects of incidents affect the capacity of the road, average speed, time loss, vehicle queues and traffic jams. In the article road incidents were divided into planned and unexpected. Statistical analysis prepared using the database of traffic...

  Full text to download in external service

• Shales Leaching Modelling for Prediction of Flowback Fluid Composition

  Publication

  • A. Rogala
  • K. Kucharska
  • J. Hupka

  - ENERGIES - Year 2019

  The object of the paper is the prediction of flowback fluid composition at a laboratory scale, for which a new approach is described. The authors define leaching as a flowback fluid generation related to the shale processing. In the first step shale rock was characterized using X-ray fluorescence spectroscopy, X-ray diractometry and laboratory analysis. It was proven that shale rock samples taken from the selected sections of horizontal...

  Full text available to download

• Mechatronics design, modelling and controlling of the Stewart-Gough platform

  Publication

  • D. Owoc
  • K. Ludwiczak
  • R. Piotrowski

  - Year 2019

  This paper presents a mechatronics design of a low cost Stewart-Gough platform (SGP) with rotary actuators. The designed SGP is supposed to be applied in a ball & plate control system. The synthesis of the ball & plate control system is also within the subject of the paper. A mechatronics design process of the SGP was conducted with computer-aided design (CAD) software. Unique analytical solutions of an inverse kinematics problem...

  Full text to download in external service

• Strength parameters of masonry walls in modelling historic constructions

  Publication

  • M. Gołębiewski
  • I. Lubowiecka
  • M. Kujawa

  - Civil and Environmental Engineering Reports - Year 2015

  The paper presents the determination of the basic material properties of a historic brickwork. Experimental studies were used to identify the basic material properties of bricks. The mechanical properties of the masonry, as an orthotropic homogenized material, were calculated. Then, numerical simulations using the Finite Element Method (FEM) were performed to verify the experimental outcomes. Macromodels with element sizes of 40,...

  Full text available to download

• Hysteresis modelling of a medium frequency single-phase transformer

  Publication

  • P. Dworakowski
  • A. Wilk
  • B. Lefebvre

  - Year 2017

  The article describes a feedback Preisach hysteresis model equivalent circuit implementation of a medium frequency single-phase transformer being a part of a high power and high efficiency DC-DC converter. The macroscopic models of magnetic hysteresis are introduced and the feedback Preisach model is selected for further analysis. The hysteresis model is developed for a prototype transformer and the hysteresis loops are compared...

  Full text available to download

• Selected problems of decision making modelling in power engineering

  Publication

  • W. Kamrat

  - Sustainable Energy Technologies and Assessments - Year 2021

  The paper presents the selected problems of decision making modelling in power engineering specially investment risk evaluation methods. The proposed model can be used in the range programming the development and investing process in power engineering. Decision making problems in power engineering and the evaluation of investment effectiveness in particular are closely related to modelling which relatively accurately reflects...

  Full text available to download

• Modelling of Abdominal Wall Under Uncertainty of Material Properties

  Publication

  • K. Szepietowska
  • I. Lubowiecka
  • B. Magnain
  • E. Florentin

  - Year 2020

  The paper concerns abdominal wall modelling. The accurate prediction and simulation of abdominal wall mechanics are important in the context of optimization of ventral hernia repair. The shell Finite Element model is considered, as the one which can be used in patient-specific approach due to relatively easy geometry generation. However, there are uncertainties in this issue, e.g. related to mechanical properties since the properties...

  Full text available to download

• Modelling of heat and mass transfer through wooden buildings

  Publication

  • R. Méchi
  • E. Miszewska
  • K. Slimi
  • R. Jankowski

  - Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics - Year 2020

  The aim of this review paper is to examine the most recent available studies dealing with theoretical, numerical and experimental aspects related to modelling of heat and mass transfer through wooden buildings. The main thermophysical, mechanical and hygrometric properties of wood are firstly discussed. Then, the basic governing equations of heat and mass transfer phenomena are presented. A detailed description of the physical...

  Full text to download in external service

• Modelling of dielectric properties of BiNbO4-based microwave ceramics

  Publication

  • D. Czekaj
  • A. Lisińska-Czekaj
  • B. Garbarz-Glos
  • W. Bąk

  - ARCHIVES OF METALLURGY AND MATERIALS - Year 2020

  In the present paper results of the studies devoted to computer simulations of dielectric response of electroceramics in a frequency domain as well as analysis of the experimental data are given. As an object of investigations BiNbO4-based microwave ceramics was taken. Simulations of the hypothetical impedance response of the ceramic system were performed under assumption of the brick-layer model. A strategy for analysis and modelling...

  Full text available to download

• Advances in Modelling and Analysis of Strength of Corroded Ship Structures

  Publication

  • K. Wołoszyk
  • Y. Garbatov

  - Journal of Marine Science and Engineering - Year 2022

  The present study reviews the recent advances in modelling and analyses the strength of corroded ship structures. Firstly, the time-variant methodologies that consider only the mean structural element thickness loss due to corrosion degradation are identified. Corrosion degradation is regarded as the phenomenon that causes uneven thinning of specimens. This has been captured by various researchers as the loss of mechanical properties...

  Full text available to download

• Modelling of concrete behaviour in uniaxial compression and tension with DEM.

  Publication

  • M. Nitka
  • J. Tejchman

  - GRANULAR MATTER - Year 2015

  W artykule omowiono wyniki modelowania betonu podczas jednoosiowego sciskania i rozciagania stosujac metode elementów dyskretnych. Beton zostal opisany jako material 3-fazowy (kruszywo, zaprawa cementowa i strefy kontaktu). Szczegolna uwage zwrocono na zjawiska mikro-strukturalne na poziomie kruszywa (lancuchy sil, wiry, obroty ziaren). Wyniki numeryczne zostaly porownano z wynikami badan doswiadczalnych.

  Full text available to download

• Modelling of concrete using lattice and discrete element method

  Publication

  • J. Tejchman

  - Year 2012

  Modelowanie betonu przy zastosowaniu metody siatkowej i metody elementów dyskretnych.

• Central European Journal of Economic Modelling and Econometrics

  Journals

  ISSN: 2080-0886 , eISSN: 2080-119X

• International Journal of Engineering Systems Modelling and SImulation

  Journals

  ISSN: 1755-9758 , eISSN: 1755-9766