Search results for: MODELLING

• 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...

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• 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...

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• 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.

• 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...

• 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...

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• 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,...

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• Propagation Path Loss Modelling in Container Terminal Environment

  Publication

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

  - Year 2011

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• 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...

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• 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...

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• 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.

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• Modelling of concrete using lattice and discrete element method

  Publication

  • J. Tejchman

  - Year 2012

  Modelowanie betonu przy zastosowaniu metody siatkowej i metody elementów dyskretnych.

• A comprehensive approach to SBR modelling for monitoring and control system design

  Publication

  • T. Ujazdowski
  • T. Zubowicz
  • R. Piotrowski

  - Journal of Water Process Engineering - Year 2023

  The aim of this research is to provide a comprehensive description of the Sequencing Batch Reactor (SBR) modelling for monitoring, control, and plant operational optimisation validation. The paper provides a detailed modelling of the SBR, its components and constituent processes. For this purpose, the mass balance principle and continuity equations were provided with a reactive term implemented using Activated Sludge Model (ASM)....

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• Dielectric Spectroscopy Studies and Modelling of Piezoelectric Properties of Multiferroic Ceramics

  Publication

  • A. Lisińska-Czekaj
  • D. Czekaj
  • B. Garbarz-Glos
  • W. Bąk
  • T. Tadeyos Zate
  • J. Jeon

  - Applied Sciences-Basel - Year 2023

  Compounds and solid solutions of bismuth ferrite (BiFeO3)—barium titanate (BaTiO3) system are of great scientific and engineering interest as multiferroic and potential high-temperature lead-free piezoelectric materials. In the present paper, the results of research on the synthesis and characterisation of 0.67Bi1.02FeO3–0.33BaTiO3 (67BFBT) ceramics in terms of crystal structure and dielectric and piezoelectric properties are reported....

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• Modelling of power electronic compensators for the analysis of power system operation

  Publication

  • R. Kowalak

  - Acta Energetica - Year 2013

  The article presents selected methods of modelling power electronic compensators in order to analyze their operation in the power systems. Advantages and disadvantages of models have been shown with an indication of their usefulness for modelling specific phenomena.

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• Mathematical modelling and computer simulation of activated sludge systems.Second edition

  Publication

  • J. Mąkinia
  • E. Zaborowska

  - Year 2020

  Mathematical Modelling and Computer Simulation of Activated Sludge Systems – Second Edition, provides, from the process engineering perspective, a comprehensive and up-to-date overview regarding various aspects of the mechanistic (“white box”) modelling and simulation of advanced activated sludge systems performing biological nutrient removal. In the new edition of the book, a special focus is given to nitrogen removal and an overview...

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• Numerical modelling of 3D printout using line (1D) elements

  Publication

  • K. Bobrowski
  • W. Wojnicz
  • K. Lipiński

  - Year 2017

  A proposition of some numerical modelling of the 3D printout is presented in the paper. The proposed model is composed of some 1D elements. The resulting numerical model of the infill consist of beam, spring and rigid elements. Obtained results confirm correctness of the proposed modelling method. Two methods of estimation of the spring parameters are proposed in the paper. In the first method, mechanical properties of the connecting...

• Modelling and analysis of beam/bar structure by application of bond graphs

  Publication

  • C. Orlikowski
  • R. Hein

  - Journal of Theoretical and Applied Mechanics - Year 2011

  The paper presents an uniform, port-based approach to modelling of beam/bar systems (trusses). Port-based model of such distributed parameter system has been defined by application of the bond graph methodology and the distributed transfer function method (DTFM). The proposed method of modelling enables to formulate input data for computer analysis by application of the DTFM. The constructed computational package enables the frequency...

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• Chapter 2: Modelling and analysis of rotor with magnetic bearing system

  Publication

  • C. Orlikowski
  • R. Hein

  - Year 2008

  The paper is concerned with rotor magnetic bearing system modelling. Such system is a relatively complex electromechanical system and can be considered as typical mechatronic one. The port-based modelling of physical systems has been used to obtain discrete-continuous model of considered system. Proposed approach enables to obtain reduced low-order lumped parameter representation of the system including gyroscopic interactions....

• Mathematical modelling of implant in an operated hernia for estimation of the repair persistence

  Publication

  • I. Lubowiecka

  - COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING - Year 2015

  This paper presents mathematical modelling of an implanted surgical mesh used in the repair process of the abdominal hernia. The synthetic implant is simulated by a membrane structure. The author provides a material modelling of the implant based on the dense net model appropriate for technical fabrics. The accuracy of the proposed solution is evaluated by comparing the simulations of the dynamic behaviour of the system with the...

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• Respiratory system modelling and simulation basing on the forced oscilation technique

  Publication

  • R. Kalicka
  • W. Słomiński
  • K. Kuziemski

  - Year 2007

  Conventional methods of testing lung functioning demand a specific respiratory action of the patient. In contrast, the forced oscillation technique (fot) provides measurements obtained with a minimal cooperation of the subject. The aim of this study is to verify the usefulness of the forced oscillation technique modelling in respiratory system diagnosing. in order to do it two models of fot measurements have been considered: the...

• Using FreeFEM open software for modelling the vibrations of piezoelectric devices

  Publication

  • M. Moszyński

  - Vibrations in Physical Systems - Year 2021

  Modelling vibrations of piezoelectric transducers has been a topic discussed in the literature for many decades. The first models - so-called one-dimensional - describe the vibrations only near operating frequency and near its harmonics. Attempts to introduce two-dimensional models were related to the possibility of one transducer working at several frequencies, including both thickness vibrations and those resulting from the transducer...

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• On various modelling approaches to real-time visualisation of blood flow

  Publication

  • K. Tesch
  • K. Kaczorowska-Ditrich

  - Year 2015

  This paper reviews various modelling approaches to real-time visualisation of blood flow. These include classic, macroscale approach based on the momentum conservation equation together with a proper constitutive equation. Moreover, modern micro- and mesoscale approaches, such as molecular dynamics and dissipative particle dynamics, are discussed. Advantages and disadvantages of the discussed methods are highlighted with particular...

• Some developments in constitutive modelling of soft clays, Keynote lecture

  Publication

  • S. Wheeler
  • M. Cudny
  • H. Neher
  • C. Wiltafsky

  - Year 2003

  Przedstawiono przegląd najczęściej stosowanych modeli konstytutywnych dla naturalnych gruntów słabonośnych, takich jak: gliny, namuły lub torfy. Skupiono się przede wszystkim na takich elementach charakterystyki mechanicznej gruntów słabonośnych jak: anizotropia, zjawisko pełzania i relaksacji oraz destrukturyzacja. Artykuł jest podsumowaniem 4-letniego projektu badawczego finansowanego w ramach 5 ramowego projektu Unii Europejskiej:...

• Experimentation, material modelling and simulation of bonded joints with a flexible adhesive

  Publication

  • I. Lubowiecka
  • M. RODRíGUEZ
  • E. RODRíGUEZ
  • D. MARTíNEZ

  - INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES - Year 2012

  The paper deals with material parameters identification of a flexible adhesive and the numerical simulation of its behaviour in a single lap bonded joint. The material modelling was based on the simple shear and tensile-shear laboratory tests of the bonded joints made of thin aluminium and polyurethane plates with the flexible adhesive Terostat MS 9360 manufactured by Henkel AG & Co. The adhesive was considered as a hyperelastic...

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• Some aspects of the constitutive modelling of natural fine grained soils

  Publication

  • M. Cudny

  - Year 2013

  The monograph deals with selected problems of the constitutive modelling of natural fine grained soils commonly known as clays. The main idea is not to propose a unified model which is capable of describing all known features of mechanical behaviour of fine grained soils. Instead, separate models are proposed describing the mechanical behaviour of heavily overconsolidated, lightly overconsolidated and normally consolidated clays....

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• Urban Freight Transport Demand Modelling and Data Availability Constraints

  Publication

  • D. Kaszubowski

  - Year 2018

  The paper provides a review of urban freight transport demand modelling approaches confronted with constrains regarding adequate data provision from a perspective of the local authorities. Demand estimation models has been selected as a reference because they are the most representative in terms of inclusion of urban freight indicators which can be transformed into a decision-support tool for evaluation of freight measures. The...

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• Modelling of the Heat Flux Density Distribution for Laser Beam Welding

  Publication

  • A. Marmołowski
  • W. Kiełczyński

  - Solid State Phenomena - Year 2011

  Great interest of the laser beam welding in industry is a new theoretical task, making planning the welding procedure specification and the quality control of welded joints easier. Estimating and calculating the dimensions of a weld pool and temperature distribution near weld mainly concern heat source modelling. In the presented work calculations of welding pool shape and thermal field for cylindrical-powered-normally model of...

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• The Dynamics of Trade Relations between Ukraine and Romania: Modelling and Forecasting

  Publication

  • O. Melnychenko
  • V. Matskul
  • T. Osadcha

  - Virtual Economics - Year 2022

  The article examines the monthly dynamics of exports, imports and balance of trade between Ukraine and Romania in the period from 2005 to 2021. Time series from 2015 to 2021 were used for modelling and forecasting (since the date the European Union–Ukraine Association Agreement took effect). Adequate models of the dynamics series of the Box-Jenkins methodology were built: additive models with seasonal component ARIMA (Autoregressive...

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• Numerical Modelling of Connections Between Stones in Foundations of Historical Buildings

  Publication

  • J. Przewłócki
  • M. Zielińska
  • K. Grębowski

  - IOP Conference Series: Earth and Environmental Science - Year 2017

  The aim of this paper is to analyse the behaviour of old building foundations composed of stones (the main load-bearing elements) and mortar, based on numerical analysis. Some basic aspects of historical foundations are briefly discussed, with an emphasis on their development, techniques, and material. The behaviour of a foundation subjected to the loads transmitted from the upper parts of the structure is described...

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• Problems with modelling the strength properties of sailing vessels rigging ropes

  Publication

  • J. Kozak
  • A. Czaja

  - Prace Wydziału Nawigacyjnego Akademii Morskiej w Gdyni - Year 2017

  This article presents the basic parameters of soft ropes: natural fibre ropes, soft wire ropes and synthetic fibre ropes used for running rigging. There are only several materials still used for the production of natural fibre ropes, including cotton, jute, hemp, sisal and manila hemp. The most commonly used soft wire ropes are twisted pair ropes; for smaller diameters there is a 6x19M - FC rope and for larger diameters – 6x37M...

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• Modelling of Different Aeration Modes Influencing Processes in SBR Bioreactor

  Publication

  • K. Jaromin-Gleń
  • A. Piotrowicz
  • J. Drewnowski
  • G. Łagód

  - Year 2015

  Currently, computer modelling together with the simulation tools tailored for that purpose constitute a very important element in planning technological changes within wastewater treatment plant. From the point of view of the WWTP operator every modification should be introduced in order to improve the quality of treated sewage with the lowest financial outlays. These requirements can be met by using computer programmes to effectuate...

• Modelling and Analysis of the Positioning Accuracy in the Loading Systems of Mobile Cranes

  Publication

  • W. Kacalak
  • Z. Budniak
  • M. Majewski

  - Materials - Year 2022

  In this work, the authors analyse the influence of the order and range of sequential movements of a crane's working members on the accuracy of the final cargo positioning. The analysis was conducted on the basis of a specially developed method in which the authors proposed the introduction of a geometrical indicator of positioning the load in the intermediate positions (after completing each movement sequence) and in the target...

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• Marine traffic risk modelling – an innovative approach and a case study

  Publication

  • J. Montewka
  • P. Krata
  • F. Goerlandt
  • A. Mazaheri
  • P. Kujala

  - Proceedings of the Institution of Mechanical Engineers Part O-Journal of Risk and Reliability - Year 2011

  This paper presents a model to analyse the risk of two common marine accidents: collision and grounding. Attention is focused on oil tankers since they pose the highest environmental risks. A case study in selected areas of the Gulf of Finland in ice-free conditions is presented. The model utilizes a formula for risk calculation that considers both the probability of an unwanted event and its consequences. The model can be decomposed...

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• NUMERICAL MODELLING AND EXPERIMENTATION OF HISTORICAL CARPENTRY CORNER LOG JOINTS

  Publication

  • A. Pestka
  • K. Szepietowska
  • P. Kłosowski
  • M. Krajewski
  • I. Lubowiecka

  - Year 2018

  The main purpose of this research is to determine the stress distributions on the contact surfaces between the logs of the historical carpentry corner joints. The additional purpose is to compare the stress distribution for four different boundary conditions in the case of dry and wet pine wood. The paper presents the results of numerical analysis of the shortcorner dovetail connection and the saddle notch corner joint, which are...

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• Modelling of sequencing batch reactor operating at various aeration modes

  Publication

  • G. Łagód
  • A. Piotrowicz
  • P. Gleń
  • J. Drewnowski
  • F. Sabba

  - MATEC Web of Conferences - Year 2019

  The presented study involved designing a computer model of a sequencing batch reactor (SBR) at laboratory scale. The data pertaining to the technical aspects of the bioreactor and quality indicators of wastewater constituted the input for the employed simulation tool, i.e. GPS-X software package. The results of a simulation involving a 12-hour operation cycle are presented in this work; each cycle included 6 phases: filling, mixing,...

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• WAVE AND CURRENT MODELLING OVER THE BALTIC SEA AND THE GDAŃSK BAY

  Publication

  • W. Cieślikiewicz
  • A. Herman

  - Year 2003

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• Numerical modelling of thermodynamics and dynamics of sea ice in the Baltic Sea

  Publication

  • A. Herman
  • J. Jedrasik
  • M. Kowalewski
  • A. Herman
  • M. Kowalewski

  - Ocean Science - Year 2011

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• Modelling heat transfer in heterogeneous media using fractional calculus

  Publication

  • D. Sierociuk
  • A. Dzieliński
  • G. Sarwas
  • I. Petras
  • I. Podlubny
  • T. Skovranek

  - PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES - Year 2013

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• Numerical modelling of conical wave formation in multimode optical fibers

  Publication

  • S. Majchrowska
  • K. Tarnowski
  • P. Bejót
  • B. Kibler

  - Year 2021

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• Neural network modelling of the influence of channelopathies on reflex visual attention

  Publication

  • A. Gravier
  • C. Quek
  • W. Duch
  • A. Wahab
  • J. Gravier-Rymaszewska

  - Cognitive Neurodynamics - Year 2016

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• Respiratory system modelling and simulation based on the forced oscillation technique

  Publication

  • R. Kalicka
  • W. Słomiński
  • K. Kuziemski

  - SYSTEMS SCIENCE - Year 2008

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• Modelling and static analysis of thin-walled structures, problems and applications

  Publication

  • C. K. Szymczak
  • M. Kujawa
  • T. Mikulski

  - Year 2007

  W pracy przedstawiono pewne problemy związane z modelowaniem i analizą statyczną konstrukcji cienkościennych: belek, ram i rusztów zbudowanych z elementów o bisymetrycznym przekroju poprzecznym. Zachowanie elementów opisano za pomocą klasycznej teorii prętów cienkościennych o przekroju nieodkształcalnym. Uwzględniono tym samym efekty bimomentowe od skręcania belek. Niestyty brakuje koniecznych do przeprowadzenia analizy styacznej...

• Modelling of energy flow in mechatronic systems. A bond graph approach

  Publication

  • M. Ronkowski
  • S. Makowski

  - Year 2007

  W referacie przedstawiono w sposób jednoliy modelowanie systemów mechatroniki metodą grafów wiązań (GW) w aspekcie symulacji przepływu energii. Omówiono ogólne założenia modelowania w ujęciu GW. Modelowanie przepływu energii rozważano na przykładzie napędu pojazdu hybrydowego PH-MAK.

• On the tolerance modelling of heat conduction in functionally graded laminated media

  Publication

  • C. Wozniak
  • M. Wagrowska
  • O. Szlachetka

  - Journal of Applied Mechanics and Technical Physics - Year 2015

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• A Typology of Small Business Growth Modelling: A Critical Literature Review

  Publication

  • K. Wach

  - Entrepreneurial Business and Economics Review - Year 2020

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• Quantum chemical modelling of the process of lithium insertion into WO3 films

  Publication

  • E. Broclawik
  • A. Góra
  • P. Liguzinski
  • P. Petelenz
  • M. Slawik

  - CATALYSIS TODAY - Year 2005

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• Propeller Load Modelling In The Calculations Of Marine Shafting Torsional Vibrations

  Publication

  • N. Vulić
  • K. Bratić
  • B. Lalić
  • L. Stazić

  - Pedagogika-Pedagogy - Year 2021

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• Cointegration Modelling for Health and Condition Monitoring of Wind Turbines - An Overview

  Publication

  • P. Dao
  • P. B. Dao

  - Year 2022

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• Modelling of energy flow in electrical machines. A bond graph approach

  Publication

  • M. Ronkowski

  - Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały - Year 2008

  Przedstawiono w ujęcia grafów wiązań model przepływu energii/mocy w maszynach elektrycznych pracujących w hybrydowych systemach przetwarzania energii. Jako przykład do rozważań przyjęto system napędu trakcyjnego pojazdów hybrydowych.

• Computational modelling of concrete behaviour under static and dynamic conditions

  Publication

  • I. Marzec
  • J. Tejchman

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Year 2013

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